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I have a 90 yamaha square nose superjet . It starts up fine outta water but once I put it in water it's kinda hard to start and when It does start if I put any weight in the tray it blog / stalls out and has a really hard time starting up again! I replaced all the fuel lines and filters and it still does it ! Tryed a hole new tank of gas and still doing it ! It ran fine last summer besides the start stop switch breaking which I just replaced ! Don't know what else it could be any body out there know what's wrong and how to fix ?

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  • Cars & Trucks Master
  • 45,365 Answers

I take that the vehicle is a jet ski. They work by the engine driving a centrifical pump to expel water at pressure at the out let. If it runs well out of water there is no load on the engine I would be checking things like spark plugs, timing exhaust blockages Corrosion in water jackets in exhaust as when it is water there would be water cooled exhaust.

Posted on Apr 20, 2013

  • Dusty cole Apr 20, 2013

    I've checked the spark plugs got plenty of spark checked the coils and there good too ill check the Exhaust next thx

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Posted on Jan 02, 2017

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  • 195 Answers

SOURCE: fuel line freezing

If you got freezing and all these problems persist. And you did all that you said you did, then I must say first of all, You got one H*** of an engine. But, No choice, You have to drain your Fuel Tank. I think you already knew that. Just hope you don't keep it topped off. Good Luck.

Posted on Dec 12, 2008

  • 1114 Answers

SOURCE: car will turn over but not start

engine check light on? if so OBD 2 scan for faults code

Posted on Dec 27, 2008

  • 95 Answers

SOURCE: 99 Grand Prix GTP,Changed fuel filter, will idle now, still won't

exactly right, theres trash in the tank. keep changing or cleaning the filter and get the gas out of it. replace with good gas and pick up something at the auto to dry up the water in tank. auto guy should be able to help pick something. hope it helps

Posted on Mar 21, 2009

motor1258
  • 6674 Answers

SOURCE: 1995 jaguar xj6 stalls once you stop at the stop signs

Look for an IAC sensor (motor) Idle Air Control.
Usually located on side & front of throttle body. Not 100% sure which type you'll have but if you have pintle type (pointed end) Remove it, spray it well with throttle body cleaner as well as port it came from, and retry. If it cures it temporarily & starts to do it again, replace it.

Posted on Aug 21, 2009

  • 78 Answers

SOURCE: my 95 s10 blazer w/4.3 vortex wont start again...

it could also be the fuel pressure regulator or fuel filter that is in line or mabey the fuel injection relay i no it will not start if that blows well i hope this help please give a good rating that you

Posted on Jul 08, 2011

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Forget the sea foam
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