1996 tigershatk 770 Monte Carlo where to start?
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  1. #1
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    1996 tigershatk 770 Monte Carlo where to start?

    Hello all! I'm new here to the forum, and want to thank everyone in advance for your help! I have never owned a pwc before, but have had dirtbikes and snowmobiles my whole life and always done my own wrenching.

    I just recently picked up a 96 tigershark with trailer for $400. They said they got it and it wasn't running, put a new battery in it, got it running, and it died on the water.

    It turns over and has plenty of spark. I dumped fuel in the carbs and it fired right up. My first thoughts are to drain the existing gas from the tank, and clean the carbs. When I investigated the machine, everything looks good, but the drain plug was loose. My minimal experience suggests that they had it on the water, it took on water, so much to the point that it wouldn't run. I'm open to any suggestions as to where to start. Also, this has twin carbs. Dobi have to worry about syncing them or anything if I were to pull them off and clean them?

    Don't be afraid to ask me any questions.


    "The only stupid question is the question that doesn't get asked."

  2. #2
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    Re: 1996 tigershatk 770 Monte Carlo where to start?

    You just bought a 23 year old boat, likely 13+ years past the design life, and who knows who did what to it over the years. Are you riding solo or with friends? I ask because who's gonna tow you home?

    If it ran as you said, there's at least some compression in it. I would suggest going over the whole fuel system, from tank pick up tube, back to return line. Use only genuine Mikuni kits and parts or you'll do it twice. The basic carb kit does not include needle and seat, and the fuel pump parts are separate as well. Fuel selector valves can leak air in, pick up tubes can fracture in the tank.

    I avoided the twin carb thing by buying a single equipped model. The 770 is a tough little engine.
    Last edited by rdjeep; 09-10-2019 at 09:14 PM.

  3. #3
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: 1996 tigershatk 770 Monte Carlo where to start?

    Do all the simple stuff first.

    Quote Originally Posted by Wkbrdnaked View Post
    I dumped fuel in the carbs and it fired right up.
    If it doesn't start without a prime, that is a good starting point.


    Bill M.
    Horsepower == Speed, RPM != Speed



  4. #4
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    Re: 1996 tigershatk 770 Monte Carlo where to start?

    Bill, what do you suggest I do? My thoughts are to go through the fuel system, but I'm still learning these machines. Are you suggesting fuel pump?

  5. #5
    I dream skis
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    Re: 1996 tigershatk 770 Monte Carlo where to start?

    If it is still using the oil injection, run it with some premix until you are SURE the oil system is still working.

    When I got mine the fuel selector valves were stuck. Adding premix freed them up, but one failed a year or so later.

    I replaced the fuel lines with clear so you can see what it happening in the lines. Don't have to replace it all but if you put clear between the filter and the fuel pump inlet and between the return and the check valve you can see whats is happening in the fuel lines.

    Then see if you can get it running using premix in a squirt can, and watch the fuel lines to see if you have good flow.

    You may need to work on the carbs.
    2, 1998 TS 770 L, restored and running great as of July 2019 (NO THANKS to the person at SBT, who put the WRONG crankshaft bearing into the rebuilt engine I got from them)

  6. #6
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: 1996 tigershatk 770 Monte Carlo where to start?

    Quote Originally Posted by wmazz View Post
    If it doesn't start without a prime, that is a good starting point.
    Quote Originally Posted by Wkbrdnaked View Post
    I'm still learning these machines. Are you suggesting fuel pump?
    If our watercraft had a regular float bowl style carb, a fuel pump would
    be a good starting point. But the diaphragm carbs watercraft use have
    a complicated way of opening the needle and seat. So what many people
    think is a fuel pump problem (on watercraft), is often a vacuum leak or
    a problem with the engine producing manifold vacuum.

    It is far more common that a vacuum leak (on the carb base or reed
    gaskets) or leaking main seals to cause a hard starting problem. Of
    course there are other possibilities.

    I try to help people recognize a problem when they stumble across one.
    So keep an eye on the gaskets; have they been reused, are they wet.
    These are signs of a gasket that is leaking (if wet) or the potential to
    leak (if used).

    When you disassemble the carb look for water or rust. Inspect the float
    diaphragm, it should be soft and flexible. Look at the lever position (should
    be level with the casting). Inspect the spring, but don't replace it, unless
    someone installed the wrong spring. Inspect the fuel filter. If it is packed
    with gue, it may have come from the fuel lines. Inspect the fuel pump check
    valves and fuel pump gaskets or diaphragm. Some times they get reused
    and damaged.

    If you find any rust or water, blow out the lines drain the tank and mop it
    dry. Gue in the fuel filter may be from the fuel lines, and it may also be in
    the pet****.

    Pay more for less headaches and purchase oem Mikuni parts! Replace gaskets
    instead of reusing them. If you cant find them, make some with thick gasket
    material from napa.


    Bill M.

    Make a pop--off tester, then test the needle and seat, wet with wd-40. Test
    pop-off inside a clear plastic bag (like a gallon size zip-loc) to prevent wd-40
    from spraying in your face.

    Then test the pop-off (wet) and with the carb fully assembled, to test your
    lever height.
    Last edited by wmazz; 09-14-2019 at 01:10 AM.
    Horsepower == Speed, RPM != Speed



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