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  1. #1

    rave valves/rotarty valve

    are these the same and if there not whats the difference between them and does a 1993 xp have them?


  2. #2
    Jug Inspector
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    The first engine to have gas exhaust valves from Sea Doo was the 95 787 found in the race XP. Your 93 does not have RAVE valves.

    Your ski does have a rotary valve. It runs off the crankshaft via the rotary shaft (big surprise) and spins to open and close the intake ports. It takes the place of reeds on other machines, or port timing on Piston Port engines.

    Bryan

  3. #3
    ...thanks....could the rotary valve make my 93 xp hard to start and then start to bog?

  4. #4
    Jug Inspector
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    Maybe. Did you take it off? Is there a ton of hours on it?

    Start with the basics -

    Fuel system:
    Lines, filters, carbs, pickups, etc. If all that is new/clean/rebuilt then we'll get into the rotary.

    Bryan

  5. #5
    .....it doesnt really have a ton of hours on it so i dont think that the rotary valve could be the problem (as i talked to my friend) but when i took the carbs apart i noticed that on the fuel pump side the o-ring type piece of rubber, (the rubber piece on the side of the carb opposite from the diaphram)
    had expanded and did not fit into the groove in the carb anymore..... and when i was talking to my friend he said to double check all the gaskets and diaphrams and i was wondering on the fuel pump on the front of the carb does it go: metal piece; gasket; diaphram; metal piece; diaphram; carb?
    and on the metal piece that is sandwhiched between the carb and fuel pump cover how should those little rubber plugs go that hold on the plastic disks and could it make a differance if i got those mixed up?

  6. #6
    Jug Inspector
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    Buy a carb rebuild kit. That ski has a BN - a full rebuild kit is like $35. Get a new needle and seat ($15), re-set your popoff, clean the carb and we'll go from there.

    Bryan

  7. #7
    could a low pop off make it bogg?

  8. #8
    Jug Inspector
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    Yes

  9. #9
    I'm kind of a big deal SeanCucf's Avatar
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    change out those grey Tempo fuel lines too, if you have them. they break down and clog up the carbs....don't remember when they started using them though

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