5 Potential Jet Ski Repair Solutions for Engine Problems

Looking for jet ski repair near you? Read more for maintenance tips & tricks. Water riding vehicles provide tremendous enjoyment for owners and renters alike. However, jet ski sales reps would bring great benefit to their customers by sharing the proper maintenance guidelines for watercraft units purchased by those seeking the feel of speed on the lakes.  Jet ski parts will eventually wear out and cause problems for the owner if these strong, but delicate items are not properly cared for. Jet ski repair shops may charge hefty prices for ongoing engine failures due to ignorance and/or neglect of engine care from jet ski owners. Proper repairs, along with preventive maintenance, such as a winterize procedure for the water vehicle, are a must for the owner to enjoy a long life of his or her water ride.

With jet ski repairs being potentially expensive, many watercraft owners will investigate DIY blogs and videos in an attempt to fix any of the jet ski parts found on their lake or ocean jet units. A jet ski owner may think that watercraft repairs cannot be more difficult than the automobile repairs the car owner handles with the assistance of blogs and internet videos. Although jet ski parts have some similarities to automobile parts, there tend to be some complexities with jet ski repairs that the average handyman may be surprised to find when rebuilding that jet ski engine which looked so easy in the beginning. The smaller jet ski engine size can be deceiving when comparing the unit to an automobile engine. Below are 5 potential solutions for jet ski repairs that the novice or experienced owner may need to address in the lifetime of their watercraft.

Replacing Jet Ski Parts

1. Replacing the Fuel Lines:

These particular jet ski parts may be overlooked in the initial diagnosis of engine failure. Deteriorated fuel lines can leave debris that may clog up the carburetor which enables a slow, inefficient jet ski engine performance. Some minor homework is in order when replacing fuel lines. Various jet ski models will require a variety of fuel line sizes. There is no one-size-fits-all for lake or ocean jet ski items. For improved throttle response, fuel line return restrictors can be installed between the carburetor and the fuel tank. Using a fuel stabilizer to help continuously keep your fuel system operating at peak performance can prevent costly repairs to the fuel system in the future.

2. Replacing the Jet Pump:

Learn more about jet ski parts and repairs.

This device is located on the bottom of lake jets. Pumps contain an impeller which is the vital part of accelerating water pressure before it discharges through the rear nozzle of jet ski units. This leads to increased engine control, therefore increasing performance. Some symptoms of a worn jet pump may include vibrating while the watercraft unit is in idle mode. Some owners include the rebuilding of the jet pump every 4 to 5 years as part of their jet ski repair/maintenance procedures. Also included in the pump system are wear rings. The impeller is encased in the wear ring. Constant debris that continues to chip away at these vital parts of the jet pump may have negative effects on engine performance. Maintenance of the jet pump system is one procedure that jet ski owners and even jet ski sales shops recommend as part of a winterize procedure for the vehicle during cold off-season days.

3. Replacing the Crankshaft:

Jet ski engine problems may be instigated by rusted crankshafts. Users involved in jet ski rebuilds seem to slightly favor welded based crankshafts. The welds help hold the pins in place. The pins are the key elements that hold the flywheel in place, which is the counterweight of the crankshaft. Some owners believe that crankshafts welded to the cylinders will prevent twisting of the unit. The opinion varies among owners and jet ski repair shop merchants about the superiority of welded crankshafts.

4. Changing the Battery:

The battery is often overlooked as a potential source of problems on many vehicles. Car owners often do not investigate the battery unless the car engine refuses to turn over and start. Engine diagnosis on jet skis often run into the same situations of having the battery overlooked as a potential source of problems. A battery may lose its charge over time if it is left out in the cold over a long period of time. Removing the battery is often recommended as one way to help winterize the watercraft. Batteries should be stored in a garage or other environments that protect it from harsh cold and winds. “Smart” chargers help batteries maintain proper usage levels during the offseason. For extra protection, covering of the battery terminals with rubber or even cardboard will prevent arcing as well as help the unit to maintain its consistency over months of non-use. A battery charger will ensure the unit is ready to go when it’s time to pull the vehicle out of the garage for summertime rides on the water.

5. Proper Sealing:

Seals are vital for engine performance. Seals are another group of items that jet ski owners are not aware of when the purchase was made from the smiling jet ski sales associate. The associate may not mention that worn out seals throughout the engine may allow an overflow of oil in undesired areas. Gaskets are the most common forms of seals for jet skis. Because engine parts are often not perfectly matched, proper gasket materials such as forms of treated paper, or metal will provide the filler for joints that need matching. Metal gaskets, although more expensive, are recommended in many cases as metal is able to withstand outside pressure better than its paper counterpart. Checking for proper seals can be included in the water vehicle’s winterize procedure. Some jet ski parts that require gaskets are crankshaft ends, exhausts, flywheel covers and oil pumps. No matter which parts need connecting, proper seals are a must for the jet ski engine to run to its full potential and lifespan.

Buying a Jet Ski for the First Time

When a jet ski newbie is looking online for jet ski sales shops, the investigation should be just as intense at looking at the care and maintenance of jet skis. Maintenance is often overlooked by many until the later stages on most motorized items we own. Thoughts of fixing or repairs don’t enter in until funny noises and/or loss of high-end performance begins. If a used jet ski model is an option, a thorough education and investigation of the jet ski parts is a must. The jet ski sales rep should be able to tell the potential buyer about proper care for various jet ski models. If the sales rep is not knowledgeable about technical repairs, he or she should have someone close at hand to give the customer proper repair guidance when requested.

One important tip for those who use their jet ski in salt water is to thoroughly clean the jet ski after each and every trip in salt water. This will help to clean out the motor and pumps since salt water is highly corrosive and will damage the motor quicker than just running it in fresh water.

The 5 items listed above are not inclusive of all jet ski repairs, but they are pretty common to problems encountered with the vehicles. The five repair solutions, as well as the recommended procedures to winterize, will ensure a longer life of the water units so more time can be spent in the summer riding on the currents and less time and money spent in the garage fixing jet skis.

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  • I have some questions and need some help with my wave runners

    • Hi Colby, please contact us at producttechsupport@goldeagle.com and we can help you.

    • I have a 2007 Vx cruiser when I take off the reverse lever raise it up to half mast. What can I do about this, or is it supposed to do that. I am new with this ski

  • I have a 2016 FXSVHO I was writing it this weekend under full power There’s nothing in the impeller. I can only run 42 miles an hour 5600 RPM any suggestions?

    Thanks Wally

    • Hi Wally, It may be difficult to ascertain what the issue could be without being presently there. However, if replacing the fuel with higher octane, fresh fuel, or/and adding a performance additive such as STA-BIL 360 Marine, doesn’t help, perhaps the best option is to have it serviced by a professional mechanic.

  • Hi I have a Kawasaki ts 30yrs old it starts and runs fine out of water but the minute it’s in the water it won’t even start?

    • Hi Simon, since we are not able to assess your car in person we would suggest taking it to a trusted professional mechanic.

    • Bad head gasket leaking water into cylinder

  • I turned the water on before starting and left water run 5 mins. but did not start it and then read book that said I probably got water in my motor. how do I get it out or check to be sure water is in there

    • Hello! If you suspect water is in the fuel tank then we recommend Iso-HEET® Water Remover & Premium Fuel Line Antifreeze + Injector Cleaner. This will help to remove water from the fuel system. If you have any other questions please contact consumer support at producttechsupport@goldeagle.com.

  • i have a 2006 kawasaki jet ski when first starting ( cold ) i use the choke when it starts uo i release the choke but smokes comes out the back and their is a film of either gas or oil on the water

    • Hello! It is very difficult to assess and diagnose these type of problems without a proper inspection. In this particular situation, perhaps it would be helpful seeking a second opinion from a different professional technician. If you have any other questions please contact consumer support at producttechsupport@goldeagle.com

  • Hello , I have a 2013 Kawasaki ultra 300 lx not supercharger,with about 45 hrs on it , it always ran fine and I took it to the Florida Keys from Massachusetts hit some seaweed witch is a common problem and now it overheats there is still some stuck way back in the impeller could this cause overheating,already checked hoses and oil.thank you,Brian

    • Hello! In this particular situation, perhaps it would be helpful seeking a second opinion from a different professional technician. If you have any other questions please contact consumer support at producttechsupport@goldeagle.com

  • I put the battery cables on backwards. Now my ski won’t do anything,,,What can I do to fix the problem??

    • Hi Kevin, In this particular situation, perhaps it would be helpful seeking a second opinion from a different professional technician. IF you still have questions please contact consumer support at producttechsupport@goldeagle.com.

    • Replace starter solenoid fuse

  • Where can I buy the parts to change my 1997 1100 STX from oil injection to mixed fuel use?

  • Runs great for about a half hour then shuts down, restarts but barely idles, leave it alone, half hour later runs great again,

    • Did you get a answer? I have the same thing happing

      • Had a similar problem with 97 1100stx. Ski would run great for 20 min and then start missing severely. Let it sit for a day or two and it would run fine…for 20 min. Ended up being the stator cover was cracked and filling up with water. Replacing cover fixed it.

  • i have a 1995 Polaris 750 SLT jetski that will not turn over .does anyone in the metro Detroit area work on Polaris jetski’s?

    • was wondering if you ever found anyone to work on your Polaris? I have one myself and have been trying to find someone.

  • In have a 1997 Yamaha wave runner in great condition. However, when I put it up on the dock for an engine flush, the engine races out of control, forcing me to pull the emergency stop cord be use stop button won’t work. What is going on?

    • Hi, Todd. This is an unusual situation. Perhaps asking a professional technician may be the best step. If you have any other questions please contact consumer support at producttechsupport@goldeagle.com

  • I left my carburetted 2000 sea doo gtx in water for 4 weeks….it started and everything was good but I ran it for cpl hrs and all I could reach were 5900 rpm and 48mph….it was going 6700rpm and 60 mph prior to that…..any ideas of possible issues.? and no I will never leave it in water for that long ever again…..it was a freshwater lake

    • Hello! This could be due to having water in the fuel. We would recommend using ISO-HEET to see if that helps. If the issue continues or gets worse, perhaps the next step is to have it serviced.

  • I have a Kawasaki STX 12F that runs great and is garage kept. However, when sitting overnight of long periods of storage, I have to crank it over 15 or 20 seconds to get it to start. seems like the fuel system loses pressure. Is there a check valve in it somewhere?

  • Hello, is there a way to check the start button on a 1997 Yamaha Wave Runner? I have a new battery. Wave runner will not crank. How can I check the starter?

  • Good info . So I have a 95 model 700s Yamaha WR PWC and under power the reverse and forward gear is difficult to transfer ( fearing I might snap the cable ) when it sits on the trailer it goes into F/ R easy . You have probably heard this before . So “ FRUSTRATING “

  • I just bought a 1997 Sea Doo Gtx bombardier a month ago. It was running good and then this guy changed our fuel lines for us. Also the motor didn’t seem to be bolted back right but it is now. But when I go to start it, it is making a loud metal noise inside the seat where motor is. Could it be that my starter is bad or what else could it be for it to be making a loud metal clacking noise?

    • Hi, Becky. It is difficult to diagnose the issue without physically inspecting the mower. If any of these tips do not work, perhaps consulting a small engine mechanic may be the best option. Thanks for stopping by!

  • 2004 Polaris MSX 150 turbo so I really need to know why light red flush and say check engine flush so I don’t have scan for my jet ski thank u

    • Hi, Shane. It is difficult to diagnose the issue without physically inspecting the jet ski. If any of these tips do not work, perhaps consulting a mechanic may be the best option.

  • I ran up on some sand and my jet ski will not go over 5 mph

    • Hi, Joanne. It is difficult to diagnose the issue without physically inspecting the jet ski. If any of these tips do not work, perhaps consulting a mechanic may be the best option. Thanks for stopping by!

  • hi GOD BLESSYOU I have a ’87 Yamaha wave runner 500 and I did big mistake I forgot to connect back one sparkplug and i was running the jet sky for about ten minutes (it was running so bad) when I remember I connected the wire back after all it was running good for about 15 minutes then it stop I checked the spark plug and I don have any spark and I checked the spark plug cable and no spark can you help me please

    • You killed the coil running on one cylinder

  • Morning is it easy to remove the impeller or pump on a 1996 Gti have a bad crack in half carbon piece on the shaft near the rubber boot.

  • My JetSki runs good for about three minutes and then it runs very bad and won’t go over speeds of 2 mph can someone please help me I have already put a new carburetor on it I don’t know what it is

  • Hello I have a 2009 Yamaha VX crusier. Recently the speedometer started not working. While a short test drive the other day it would show speed briefly but most of the time read 0. Other days it just says 0. I have made sure the speedometer paddle wheel moves freely and had some one see if the speed changed as i spun it. (nothing) Not sure where to go from here.

  • I have a 2010 waverunner and it had some oil leaks(which were fixed) and after i put the battery back in(fully charged) it started for a second. I shut it off because i was just testing to see it it was fixed. I tried to turn it on again but it did not turn over. Not only did i hear the starter relay but this vibrating sound of what could have been the starter. It wont run all you can hear is a vibrating noise. If anyone could help please reply back. Thanks

  • I have a 1995 wet jet duo 300 it runs and sounds good but is topping out around 10 mph and not breaking the water any information that could be given would be great

  • Thanks for letting me know that it’s advisable to get the jet pump rebuilt every few years in order to keep it in good condition. As a new watercraft owner, I’ll have to keep that in mind. I really loved using our jet ski last summer and want to make sure it lasts a long time. I’ll have to remember to get regular watercraft repair to make sure it’s all properly maintained and in good shape whenever I use it during our annual vacation.