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Reasons Why Your Jet Ski Won’t Start

It’s time to update this post after answering hundreds of comments from readers and helping them with their jet ski starting problems.

I’ve added more things to try when your jet ski is refusing to start, along with many new tips. It can be frustrating when your jet ski won’t start, but with this new updated guide, it will help you figure out why.

Why Your Jet Ski Won’t Start

A jet ski not starting is most often a dead or weak battery. A bad starter relay can also be another reason for a jet ski not starting.

Usually, when you hear multiple clicks from your jet ski, it’s a bad battery and if it’s one click it’s a bad starter relay.

A bad battery and starter relay are the most common reasons for a jet ski to not start, but here is a list of other things that can cause starting problems that we’ll go over in this post.

  1. Bad or weak battery.
  2. Bad starter relay.
  3. Bad spark plugs.
  4. Bad or wrong key or Locked.
  5. Sucked something up.
  6. Bad starter button.
  7. Bad fuel injectors.
  8. Blown fuses.
  9. Bad ground connections.
  10. Bad gas.
  11. Bad fuel lines if it’s a 2-stroke.
  12. Bad starter motor.
  13. Bad fuel pump.
  14. Hydrolocked.
  15. Broken safety lanyard or not attached.
  16. Fuel selector is not on, 2-strokes only.
  17. TOPS switch is bad.
  18. ECU or ECM is bad.
  19. Overheating/cooling issues.
  20. Throttle position sensor bad.
  21. Blown engine.
  22. Damaged gauge.

1. Bad Or Weak Battery Can Keep A Jet Ski From Starting

The most common reason for a jet ski to not start is a bad or weak battery.

You can tell it’s a bad battery if you press the start button and all you get is multiple clicks coming from the engine compartment. That multiple clicks are the starter relay clicking because the battery doesn’t have enough power to turn the engine over.

If you put the key on and the gauges do not come on, it is another clue that the battery is dead. A completely dead jet ski battery won’t have enough power to turn on the display or make any noises.

Even if the battery seems fine or is brand new, it still can be a bad battery.

The only way to test if a battery is good is to use a load tester. Testing the voltage doesn’t mean anything, you need to test the amps, and only a load tester can do that. You can take the battery to any autoparts store and have them load test it, or buy a load tester (Amazon Link Ad) to keep in your home.

The best jet ski battery and the correct size to get can be found in our “The Best Jet Ski Battery + What Size You Need” post.

A battery being bad at the start of the season is quite common. Batteries go flat if they’re not used for months, so it’s important you keep a battery charger on your jet ski battery in the off-season. The best battery charger and other questions relating to your jet ski batteries is covered in this post.

2. A Bad Starter Relay

The next most common reason why a jet ski won’t start is that the starter relay(solenoid) is bad.

You can tell the starter relay is bad if you only get one click or thud from the engine compartment when you press the start button. The gauges will come on when you try to start, but all you get from the jet ski is one click, that is a sign of a bad starter relay.

The starter relay is a component that takes the lower power coming from the start button and has it control a high-power wire coming from the battery. The high-power side goes directly to the starter motor to turn the engine over.

It’s not uncommon that you need to replace your starter relay for your jet ski at least 2 to 3 times within its lifetime. You can’t predict when your jet ski’s starter solenoid will fail, it’s random, but it will always give a solid thud when it does fail.

Starter relays are not hard to replace for most jet skis, it’s often two mounting bolts, plus two terminal nuts and disconnecting the low power side wires. It can be dangerous replacing the starter relay, so be sure to disconnect the battery fully before doing anything.

3. Bad Spark Plugs

If the jet ski engine turns over but refuses to fire up or sputters a bit, then that is often a sign of bad spark plugs.

The jet ski may even fire up, but won’t stay running or runs very rough.

Ideally, you should change the spark plugs in your jet ski every year, at the start of the season is the best time. Here is a list of maintenance items you need to do for your jet ski.

4. Bad key, wrong key or Locked

Customers putting on the wrong key is more common than people realize.

It’s not uncommon for a jet ski owner to get two jet skis and the keys not be programmed alike. The keys look the same, but if you have a Sea-Doo and put the wrong key on the jet ski it won’t start as each key is programmed to each machine. If you own multiple Sea-Doo’s ask your dealership about getting all your keys programmed alike to keep this from happening.

If it’s the right key, there is a chance the key or post could be bad. While rare, I’ve seen a few number of Sea-Doo keys go bad and the only fix is to get a new key. The post where the key plugs into can go bad too, one way to test that is to put a strong magnet up to it and if the Sea-Doo doesn’t beep the wrong key sound then the post is mostly likely bad.

Yamaha waverunners have some models that have key fobs, and you can lock the jet ski like you do your car. If your Yamaha has the key fob or a PIN code access, make sure it’s unlocked before trying to start it.

Yamaha Waverunner Key Fob To Lock and Unlock Jet Ski

Kawasaki has keys similar to Sea-Doo that go in the glove box, so make sure they’re inserted before attempting to start.

Kawasaki Keys In Glove Box

5. Sucked Something Up Into Jet Ski Pump

It’s a good idea to check your jet pump for anything inside it like ropes, rocks, sticks or any large item that’s not supposed to be there.

Jet skis are direct drive, this means the jet pump is connected to the engine, there is no transmission. So when you go to start the jet ski, the jet pump will also spin and if something is stuck in the pump, it will keep the engine from starting.

One of the first things you should check when you get the jet ski out of the water for a non-starting problem is the pump. Look from the rear and also safely crawl under the jet ski to look into the pump to make sure nothing is blocking the pump blades from moving.

If you need to remove something from the pump, I have a post here to show you how.

6. Bad Starter Button

A bad starter button can keep a jet ski from starting and was a common problem for 2-stroke jet skis.

The rubber of the start button can wear out and cause it to not work. The plastic start buttons didn’t give much trouble, but the rubber ones do wear out quicker.

If the button is torn, you have to press really hard with your nail, or the button is super faded, then replacing the start button is a good idea.

Do note, the start button of a jet ski is not the same as your car. You must hold the start button down on your jet ski until it’s fully started. Pressing the start button once on a jet ski will not start it, it needs to be held down until the engine gets going.

7. Bad Gas

If the jet ski turns over but won’t fire up or runs rough, and you replaced the spark plugs, then it’s most likely bad gas.

Gas goes bad when you let it sit without adding fuel stabilizer to it. It’s getting even worse with more ethanol is added to gas.

If your jet ski has been sitting for a while, then it’s a good chance the gas is bad and keeping your jet ski from firing up. Safely remove the old gas and add fresh premium gas to your jet ski.

This is why I like to store my jet ski near empty (1 or 2 bars of gas) in the off-season and when the season starts I fill it up with fresh 93 octane gas. Along with new spark plugs, you’ll be starting the season off right.

8. Blown Fuses And Relays

If you get nothing out of your jet ski when you put the key on or press the start button once, then it could be fuses or relays located in the fuse boxes that have gone bad.

Locate the fuse box, often near the battery, and check every fuse. If a fuse is blown you need to replace it.

Don’t forget to check the fuses that may not be in the fuse box, there are often fuses inline coming out the fuse box or near the battery wrapped in a rubber sleeve.

It’s not uncommon for me to see a jet ski blow a fuse because someone hooked the battery up backwards. Other times fuses blow just because, there is no good reason except the fuse was not good. If a fuse keeps blowing, you need to figure out what is blowing it.

There are also small relays, look like a small black box with multiple terminals, that go into the fuse box area. These smaller relays are used to power on the low-power items and get the jet ski into turning on mode. There is no good way to test these relays unless you have an ohm meter, but if you’ve gotten to the point of testing them, it’s just easier to replace them. These little relays are less likely to fail than the main starter relay, but they can fail.

Sea-Doo Fuse Box – OMRON black box is the small relays I’m talking about

9. Bad Ground Connections

If a jet ski is older, corroded ground connections are quite a common problem for starting issues and many other problems.

If you have corrosion around the battery terminal cables, then it’s mostly likely your problem. Corroding battery cables also mean the ground wires that connect to the engine block are corroding too.

You will need to clean all the ground connections, including where they connect to the engine block.

10. Bad Starter Motor

A starter motor going bad is more likely on 2-stroke jet skis than 4-stroke, but it can happen to both.

One way to tell it’s the starter motor that is bad is if all this below is true.

  1. Battery is good.
  2. Starter relay is good.
  3. Nothing is in the pump.
  4. Engine is not hydrolocked.

If the above is true, then it’s most likely a bad starter motor.

If you have a 12-volt test light probe (Amazon Link Ad), you can see if the starter motor is getting power to it. Clamp the negative to the battery or ground and put the probe light on the positive connection of the starter and press the start button. If the probe light turns on when you press start, then you’re getting power to the starter, and the next thing you need to do is remove the starter and bench test it. If you get no light from the probe, then the problem is before the starter.

To bench test a starter motor, you have to remove it from the engine and put it in a bench vice clamp and hook it directly to a battery. Starter motors are very jumpy, so you need to make sure it’s secured tight in the vice clamp before connecting it to a battery.

11. Carburetor Issues Or Bad Fuel Lines (2-Strokes Only)

If you have a 2-stroke jet ski that has a carburetor, then a super common starting problem is a clogged carburetor or old fuel lines.

If you have a 4-stroke jet ski, then this section is not for you, as all 4-stroke jet skis are fuel injected. You’ll know you’ll have a carbureted jet ski engine if you have a choke cable.

With the rise of ethanol in gas, it’s been doing a number on 2-strokes carburetors and fuel lines.

The solution is to clean the carburetors and replace the fuel lines, and then avoid ethanol gas as much as you can.

12. Bad Fuel Injectors

Not super common, but bad fuel injectors can keep a jet ski from starting.

Bad fuel injectors can also cause “ghost” problems when it comes to starting. If the jet ski will start but not start again after sitting or is rough to get going, it could be the fuel injectors.

I’ve had a jet ski that would start but if you let it sit for a bit it would refuse to start back up. One of the fuel injectors was leaking and dumping gas in, causing the engine to be flooded and refuse to get running.

Messing with fuel injectors is a dangerous repair and should only be done at the dealership.

13. Hydrolocked Jet Ski Engine

A jet ski that is hydrolocked means there is water in the engine, which is not a good thing.

You can get water in the jet ski engine from it sinking, drain plugs left in and flooded by rain water, broken cooling components and more.

A hydrolocked jet ski engine will refuse to start, and trying to start a hydrolocked jet ski can bend piston rods and do further damage. If you flipped your jet ski, follow these steps.

An easy way to test if there is water in your engine is to take the dipstick out and see the color and consistency of the oil. If the oil is runny and looks like chocolate milk, then that is bad. You want the oil to look amber or black and should not be runny.

Another way to see if water is in the engine is to remove the spark plugs and turn the engine over. If you get a geyser of water shooting out the spark plug holes, then there is water in the engine.

Hydrolocked engine is best fixed at the dealership or repair shop, especially if it’s a 4-stroke jet ski. You’re going to need several oil changes and the intake taken off to get all the water out.

14. Bad Fuel Pump

A fuel pump that is bad can keep a jet ski from starting, but fuel pumps going bad are not common and more of a fluke failure.

If the jet ski turns over, you’re getting spark, but the jet ski does not prime or no gas is coming out the fuel injectors it’s mostly a bad fuel pump.

Another way to tell it’s a bad fuel pump is if the gas gauge is not working, as that is a part of the fuel pump.

The fuel pump is located in the gas tank and is a dangerous repair and should only be done at the dealership.

15. Broken Safety Lanyard Or Not Attached

All jet skis have a kill switch called a safety lanyard that attaches to you and the jet ski. So if you fall off the jet ski, the engine will shut off.

Sea-Doo’s safety lanyard is the key, while Yamaha and Kawasaki have dedicated lanyards on the handlebars that wrap around your wrist.

You need to make sure the lanyard is attached to you and connected to the switch on your jet ski, or else it won’t start.

The switches for the safety lanyard can fail, especially if water gets near the contacts.

It’s recommended you let the dealership repair these lanyard switches, as it’s meant to save lives and needs to be done properly. Make sure your waverunner doesn’t have a recall on the kill switches either.

Tip: If your safety lanyard cable is stretched, damage, or broke, you have to replace it. They do not sell the cable/string separately, so you must replace the whole thing, which means for Sea-Doo you need to get a new key.

16. Fuel Selector Is Not On Or Broken (2-Strokes Only)

If you have a 2-stroke with a carburetor, you’ll most likely have a fuel selector.

The fuel selector can be moved to off, which shuts off all gas to the engine and can keep it from starting.

Make sure the fuel selector is in the “ON” or “Reserve” position when trying to start your jet ski.

An interesting way to know if your fuel lines are going bad is if the jet ski runs fine in reserve but not while in the “ON” position. People don’t use the reserve much, so the lines don’t wear out as quickly.

17. T.O.P.S Switch Triggered

The T.O.P.S Switch (Tip Over Protection Switch) is a switch that is used to determine if your jet ski is upside down. If the switch thinks you’re upside down it shuts the engine off.

The T.O.P.S Switch is used to protect your engine if you flip it and to protect you from the spinning impeller blades.

The old T.O.P.S Switches were simple mercury switches, and they could get confused about what’s up and wants down. The newer T.O.P.S Switches are more reliable, but can still fail.

If you feel like you’ve tried everything else, this is a good one to try. The only good way to tell if a T.O.P.S Switch is bad is to hook it up to the diagnostic computer, as it will throw a fault code.

A bad T.O.P.S Switch will keep a jet ski from starting, and it’s one of those things you’ll try last because it’s not common for it to fail, especially for newer jet skis.

18. ECU or ECM Is Bad

A bad or damaged ECU or ECM can keep a jet ski from starting.

The ECU (Engine Control Unit) and ECM (Engine Control Module) are the “brains” of your jet ski.

If you tried everything else and the jet ski won’t start or won’t run right, then the last thing to check is the ECU or ECM.

Unless you got the proper testing equipment from the manufacturer, it’s hard to know if the ECU or ECM are bad. Most dealerships don’t even get the testers out and just replace it with a known good computer to see if they’re bad or not.

ECU and ECM’s each cost about $1,000 to replace and will require a dealership to program them to your jet ski.

19. Overheating And Cooling Problems

If a jet ski overheats for too long, the computer will kill the engine to protect itself.

An overheated engine can refuse to start until it’s cooled back down.

If the jet ski is refusing to start back up after riding, you may have overheating problems. If you do have overheating problems, alarms should be going off to warn you.

Make sure you don’t run your jet ski out of the water for no more than 15 seconds.

20. Throttle Position Sensor Is Bad

Not super common, but a bad throttle position sensor can keep your jet ski from starting.

Fuel injected jet skis, which all 4-stroke are, will have a sensor to determine the throttle positions. If the jet ski throttle is in too much, the jet ski will refuse to start as it’s in drown mode.

Sea-Doo mostly, if you hold the throttle all the way in it goes in a drown mode which kills the fuel injectors. This mode is for testing things like compression and to make sure the engine spins without firing it up.

If the throttle sensor is not set right or confused, this could be why your jet ski won’t start. To reset this, you’ll need to hook the jet ski up to the diagnostics computer to reset the TPS.

Also, make sure you’re not touching the throttle when trying to start your jet ski. I know a few dirt bike and motorcycle guys that are in the habit to give a little gas to start them, but this is not something you do for a jet ski.

21. Blown Engine

A blown jet ski engine can refuse to start or not run well.

You can tell if a jet ski engine is blown by checking its compression with a compression gauge. You want the PSI to be over 100PSI and each cylinder to be within 15% of each other.

An engine that was hydrolocked and not taken care of properly can also blow the engine.

Running improper fuel and air mixture can lead the engine to blow too.

Running the engine to where it overheats and damages it can also blow the engine.

There are many things that cause a jet ski engine to blow, but it’s usually something major that happened to lead to such events. While a jet ski engine blowing can cause it to not start or run right, it’s not always the case and is one of the more rare reasons.

22. Damaged Gauges

A damage gauge could keep the jet ski from starting or confuse you into thinking the battery is bad. A damage gauge could keep from lighting up and ringing the buzzers too.

The main communications you have with your jet ski is the gauge and the buzzer, so if both don’t come on, it could keep you from getting your jet ski started or knowing what’s wrong.

Jet Ski Won’t Start In Water

If your jet ski will start when out of the water but won’t start when in the water, then the most likely problem is the battery or starter motor.

Jet skis are a direct drive system, so if the engine is spinning, so is the impeller. When the jet ski is put in the water, the starter motor and battery need to now work against the water, so if either one is bad or weak the jet ski won’t start.

221 thoughts on “Reasons Why Your Jet Ski Won’t Start”

  1. Hey Steve just a quick question , I have a 1994 Polaris Sl 900, It has been sitting for about 3yrs and has not been started since then. It worked just fine before but I recently tried to start it ,but will not turn over , I tried turning the shaft by hand but it seems like the motor is locked, could this happen? or maybe battery ?

    Reply
    • Yea, if the engine sits for years and was not fogged then rust can form and lock the engine. It’s best to do storage procedure before storing a jet ski for a long time. To get it fix might require a teardown, but I would drop it off at a local repair shop to see what they say.

      Reply
  2. hey i have a 1997 kawasaki 750 zxi i know the battery is bad but i got this jet ski from a family member that could not get it to run and i dont want to sink a lot of money in it so what im asking will it get enough power thru jumping it off with my truck to make it start it cranks great but no fire to plugs no lights on the panel btu the fuel gauge works and it has plenty of oil i just want to hear it start before i replace the battery

    Reply
    • Never jump a jet ski battery with a car or truck, you’ll fry the electronics. The only options you have is let the battery try to charge or buy a new battery. It’s best to let a repair shop look at it since you may have electrical issues if no lights come on.

      Reply
  3. 1999 yamaha 3 cylinder charged for couple hours and go to start I get the word start on dash and it makes a weird buzzing noise when I hit start. Battery bad? Please help thanks

    Reply
    • Buzzing could be a messed up relay, either starter or a smaller one in the electronics box. It’s best to let a repair shop look at it.

      Reply
  4. I have a 1998 seadoo gts jet ski. It will not start. I replaced the battery due to it being junk. Then replaced spark plugs. Still would not start but would crank. If you put starting fluid or gas in carb it will run. So I blew threw all glass lines and vacuum hoses. And checked all hoses for leaks. I Found no file going to carb due to lack of vacuum. So I rebuilt the carb. And it ran for about 30 seconds then stopped. So I tried to start it again with starting fluid and it started up but died any ideas?

    Reply
  5. Hi Steve. I have 2003 sea doo 4 Tec. Got it used. The guy I bought it from said the starter relay was going bad, so I changed it. It ran great all morning, then after sitting on the beach for a couple of hours, I turned the battery on to go home and it tried to start itself. After wiggling the wires around, it started normally. Then when i started going and bouncing, it would cut out again. After about 10 min of idling, I had to get back to the dock, it ran perfectly again. I cannot find any loose wires. Have you ever seen this?

    Reply
    • You said you turn the battery on, this must mean you have a battery switch. Jet skis don’t come with battery switches and it’s not the best to have them because they create an unneeded load between the battery and the starter. This could be your issue as you have too much going on between the battery – starter relay – start motor because of a battery switch. But if someone put a battery switch on a jet ski then it must mean it was draining the battery and you could have an ECM problem. Don’t forget to check the obvious stuff like the battery’s condition and if the connections are tight. If anything it would be best to let a dealership look at it.

      Reply
  6. Hello Steve. My daughter and her boyfriend were riding my 2016 Yamaha V1 sport this past weekend. The ski was running great when all the sudden it beeped 4 times, the warning light came on, then it went completely dead. I had to tow them in with my pontoon. I took the ski out of the water and it will not do anything. The gauges do not light up and it doesn’t click when you turn it over. I charged the battery but it still doesn’t do a thing. Got any idea what would make a jet ski completely shut down. It’s a 4 stroke with 12 hours on it. Any help would be appreciated.

    Reply
    • That is very odd. Since it so new I would take to the dealership and see what is going before messing with it just in case it’s a warranty item. The only thing I would maybe check is to see if the battery connections are tight. I’ve seen loose battery terminals stop a jet ski and throw odd codes before.

      Reply
  7. Any idea where the rectifier is located and the best test method in checking it? There are any marine shops near me or I would take it in for diagnosis. Thank you again!

    Reply
    • The easiest way to test if the rectifier is bad is with a volt meter. I don’t recommend doing this unless you have some experience with a volt meter and working on engines before. With the jet ski out of the water turn it on and measure the voltage of the battery while it runs. After firing up the battery should be charging around 14 volts. If the battery is at 12 volts or lower then this tells us something is wrong the charging system, it could be rectifier or stator or wiring or electronics. Remember you can only run the jet ski out of the water for about 30 seconds.

      Reply
  8. I have a 1996 Tiger Shark 900 Monte Carlo that hasn’t been started in several years. With a hot battery it will not crank over at all. Only makes one single click. Changed starter solenoid and got the same results. The engine rolls over when I turn the drive shaft so it is not seized. Could it be the starter relay and if so where is it located? Any help would be greatly appreciated.

    Reply
    • It’s not often that someone talks about a Tiger Shark. I think it might be your starter motor that is bad if the engine moves freely, the clicking could be the starter motor just giving up. Make sure the wiring going to the starter motor is good and tight and not corroded, the jet ski is 21 years old so there could be other issues too.

      Reply
  9. Thanks for all the time you put into helping others. This thread is great. Bought a pair of 2013 Kawasaki STX-15Fs last summer. Love them, BUT, one keeps losing charge. Replaced the mis-sized small battery with correct size and it made it 3 weekends, but now, when I go to start, I get one click, then several smaller ‘clicks, but nothing else. Display does not show the battery low, as in previous instances. 3rd time with this happening, and on the first two, I towed back to trailer with 2nd ski and got water in motor(question/topic for a different day). Any ideas? Starter Relay? Rectifier? Other? Thanks again!!!

    Reply
    • This is a tough one, I recommend letting a dealership look at it. But if I had to guess I would say the rectifier is bad and draining the battery when it runs?

      Reply
  10. Have a 2011 gti. When you turn off engine something keeps running. Sometimes when you attach the key and start then turn off it quits. Other times need to disconnect the battery. Sometimes it won’t start at all and you have to disconnect and reconnect the battery then it will start.

    Reply
    • That is odd, never heard of this one. It would be best to take it to the dealership and let them look at it. I can only guess that maybe it’s the fuel pump still running which is not good at all.

      Reply
  11. Hello sir, from reading you page and your replies i’m certain all i need is a starter relay, however i figured i’d still ask. Last week ski would try to start over, sounded like starter was hitting, PTO would rock back and forth, charged the battery a bit and she fired right of. This week launched the ski and went to start, nothing, not a sound, not a click, nadda. Brought it home boosted battery, now when i plug the safety switch in, i can hear the fuel pump prime, but when i press start, she gives me one solid hard click from the relay. Then she’ll do it again and again all while depressing the start button. But she will not fire off. Before reading this i was preparing myself for a starter replacement. Thoughts?

    Reply
    • I would start with the starter relay first and then replace the battery. If that doesn’t fix it then you need to take it to a repair shop to let them look at it.

      Reply
  12. Steve, i have 2004 SeaDoo RXP. These past two days, it starts, runs great for about 90 minutes or so then dies, like you pulled the lanyard. There are no beeps that would indicate the key is in place.. try and try and try no power. I tow it back in, get it back home an hour or two later, put the key on and she will start like nothing happened… This has happened back to back days. Any suggestions.

    Reply
    • It would be best to take it to a dealership to let them look at it. Sounds like a bad key or DESS post or ECM but it could also be many things.

      Reply
  13. I have a 1996 seadoo gti new motor ,new battery ,new starter relay . Press start buttons gauge lights up the four red lights come on for the battery ,temp,gas and oil then go off no beep .low gas stays on I have 2 gallons in the machine . Plug my dess key in still no beeps seadoo won’t start ?

    Reply
    • Your ski has a lot going on. To be fair it is over 20 years old and things not working will be common. So many things to try, but maybe it’s the DESS post that is bad? Just hard to tell on a ski this old, it would be best to take it to a shop that still works on 2 strokes.

      Reply
  14. I have 2015 GTX is limited 260 and when I push starter button nothing happens. Dash won’t light up. When u attach key… same thing. Battery has been tested and shows it’s ok.

    Reply
    • I would try a new battery, I’ve had batteries “test fine” but actually was bad. On that model, you should be able to press the start button first and the gauges power up and then put the key on. If that doesn’t happen and you put a new battery in it then the next step is to take it to the shop. I would take it to the shop anyways, the battery in that model is hard to get out.

      Reply
  15. Hi Steve I have a seadoo gtx 4-tec that won’t start properly it turns over and try’s to fire revs to about 350rpm but then cuts off. Reading all your other comments sounds to me like it could be the starter relay just wondering if you had any other thoughts? Many thanks great site

    Reply
    • If it’s turning over then it’s not the starter relay. The way you tell if it’s a bad starter relay is if it doesn’t turn over at all or just make one click. If it’s turning over then it would either be a bad battery or starter motor. It could be even a bad ECM not telling it to fire off. The best thing to do is take it to a repair shop and let them look at it.

      Reply
  16. I have an rxt xrs 2014 Yesterday he first started beeping and it says low voltage it ran 3 or 4times after that and now he wont start the engine Light is on when i hit the start button it jus makes 2 clicks and wont start? I would apricate any help

    Reply
  17. I have a 2008 STX 15f. I replaced the battery so it’s not a battery issue. When I click the green start button, I hear a click but the starter doesn’t turn the engine over. I tried jumping the 2 terminals with large red wires at the rear of the ski – is that the starter relay or something. Anyway doing that didn’t do anything. It didn’t even make the click like you do when you press the green button. Any ideas? Thanks!

    Reply
    • Yes, those two big terminals with red wires is the high power side of the starter relay, avoid jumping those two points as its dangerous. Even if it’s a new battery I would still check that by taking it to an auto parts store and let them do a load test on it. I’ve seen new batteries go bad out of the box before. If that’s not it then it’s either the starter motor or something keeping the engine from spinning over like it’s hydro-lock, blown, or something is in the pump. It would be best to take it to a repair shop to have them look at it.

      Reply
  18. Hey steve i just bought a 2010 yamaha wave runner vx110 and i changed the oil and spark plugs and i ran water through it using a hose, while it was running i kept reving it and after 5 min of doing that white smoke came from the back than i cut it off and when i tried to start it, it wouldnt evn turn and i doubt its the battery because i was using a booster box to jump them. Any thoughts of what the problem could be?

    Reply
    • From you saying you ran it on the hose makes me think you hydro-locked it. There are special procedures to follow when running a jet ski on a hose that you must follow or the engine get’s hydro-locked. It’s best to take it to a dealer or a repair shop to have them look at it.

      Reply
  19. Hi!! I have a Polaris JetSki We just replaced the battery.. and when we go to start it it sounds like it wants to start but won’t.. but when we hook it up to a battery charger it starts right up and will run until we shut it down.. then we have to repeat with the battery charger…any ideas?

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