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    A lot of people use primer plunger kits. And I...

    A lot of people use primer plunger kits. And I think there is a reason why primer bulbs are not recommended for PWCs but that info escapes me at the moment.
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    A Ď98 does not have power valves. Itís a different 1200 engine.
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    Thatís about right where they are supposed to be with from the factory with a 1.2 NS.
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    Try resetting the Security code. That always...

    Try resetting the Security code. That always worked for me.

    wires on a gp1200 are behind the front bucket,down low..
    as per the gp shop manual...code re enter sequence

    1. split the blue 1...
  5. Do a compression test first. Then maybe try...

    Do a compression test first. Then maybe try pressure testing the engine. You may have an air leak from the crank seal.
    If all of that checks out, you may need to rebuild the carbs.
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    It might be. Iíve posted my carb settings in several posts. If you canít find it by searching around, Iíll look when I get some time. I canít remember all the details off the top of my head at this...
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    I never bothered with reading piston wash or...

    I never bothered with reading piston wash or spark plugs myself. I just used a tried and true carb setup recipe I found on this site and it always runs perfectly.
    I also cured my porpoising problem...
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    I donít know if weak spark is your issue. Thatís not a common thing we see on these.
    The Thumb-o-meter compression gauge isnít good enough. Do a real compression test and post the results.
    FWIW,...
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    Most waterproof boat fuel gauges are something...

    Most waterproof boat fuel gauges are something like 33 full-240 empty ohms. I believe Yamaha waverunner gauges are 9-800 ohms.
    So youíll be buying a fuel level sensor (and customizing it into the...
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    A scoop style intake grate on the jet pump will...

    A scoop style intake grate on the jet pump will probably solve your porpoising issues.
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    Exactly. Just worry about getting new hoses and...

    Exactly. Just worry about getting new hoses and very secure clamps. The preferred clamps are oetiker clamps. Someone can chime in on hose size, I canít remember. Itís metric, but most people use a...
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    The finger throttle just clamps onto the...

    The finger throttle just clamps onto the handlebar. So you should be able to loosen it and adjust it around to a comfortable position. And you probably could figure out a way to convert it to a thumb...
  13. I think that rubber grommet around those wires...

    I think that rubber grommet around those wires pops out of the box and stays with the wiring.
  14. Not a leak down test. You need to do a crankcase...

    Not a leak down test. You need to do a crankcase leak test.
    You need to somewhat reassemble the engine, seal off the intake and exhaust, and put air pressure into the crankcase. Spray soapy water...
  15. My feeling is air leak lean meltdown. So now...

    My feeling is air leak lean meltdown.
    So now you can try to put it together, air leak test it, and try to find a leak. Or you can rebuild it and completely reseal it...then air leak test it.
    I...
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    Hereís what kills a 2 stroke Jetski engine: lack of oil and lean air/fuel mixture.
    Oil: keep the oil injection system in tip-top shape. The hoses are the weak point. They get hard and fall off the...
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    #3 is the rear/PTO side

    #3 is the rear/PTO side
  18. It could be lean because of the cold weather.

    It could be lean because of the cold weather.
  19. The choke cable is attached to the carburetor so...

    The choke cable is attached to the carburetor so Iíd look there to see if itís broken or disconnected.
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    I had the whole exhaust apart when I did my...

    I had the whole exhaust apart when I did my engine. I cleaned out a little bit of sand and small pebbles. And I made sure water flowed everywhere it was supposed to.
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    I could see an Outboard primer bulb potentially...

    I could see an Outboard primer bulb potentially causing fuel pump damage. But thatís a different story compared to the primer kits made for PWCs.
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    Check your impeller clearance and repair as...

    Check your impeller clearance and repair as necessary.
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    I just cut up an tire inner tube to make block...

    I just cut up an tire inner tube to make block off gaskets and pumped air in through a pulse fitting.
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    The ski is 22 years old. The rubber crank seals...

    The ski is 22 years old. The rubber crank seals and paper case gaskets are possibly old a brittle and leaking. If you can do a pressure test on the crankcase and it passes then you are good to go....
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    Itís not so much that the fuel pump gets damaged from a primer pump, itís more of a problem to damage the engine. A primer pump installed on the fuel supply line to the carbs could introduce air in...
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