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  1. #1

    Join Date
    Jul 2008
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    cleveland
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    GP 1300 Broken Crank scorched #3 piston Help

    Just purchased a 2003 gp1300-b 70hrs not running for a winter project. Had oil all over the inside of the hull. Pulled the engine last night noticed the oil pump case cracked hence the oil everywhere. Further inspection the #3 piston had just started to wear the cylinder wall lightly scorched. Took the flywheel cover off and wtf the crankshaft is broken at the end. Looks as if the crank broke then pushed the flywheel into the oil pump.
    My question is what would you do now?
    Block off the oil or new pump?
    Rebuild or replace the crank?
    Hone the #3 cyl and new rings or ?
    Best place to obtain parts?

    I'm thinking about getting it going for this season now instead of the winter project so not to many mods yet.


  2. #2
    JKR1300's Avatar
    Join Date
    Jan 2006
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    St Louis & 6mm LotO
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    497
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    Get new crank, may need new flywheel & stator - inspect closely,
    definately ditch the oil injection & go premix, post pics of the cyclinder - may need to get nicasel redone. Cheapest place for parts is boats.net

  3. #3

    Join Date
    Apr 2006
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    panama city beach 'fl
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    Cool

    crankworks maybe able to fix crank (new snout) allso while there you can have it trued & welded

    later cd

  4. #4

    Join Date
    Jul 2008
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    cleveland
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    11
    Thanks guys for the quick response.. I called Riva for a oil block off plate the tech didnt want to fully recomend the conversion to mix saying they get mixed reviews. As for the pictures will get them up soon.
    What about the Hot Rod Crankshaft Assembly would that be a better replacement? Should I do the power valve as ive read they sometimes cause piston failure since the motor is apart? Sorry new to waverunners..

  5. #5

    Join Date
    Apr 2006
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    panama city beach 'fl
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    Cool

    I was always split between oil inj. or premix-I'm now premix as are many other

    the hot rod crank seem fair (I'm not really big on the crank bearings but have used there rods kits for years with good luck

    there was lots of power valve failing so going to billet one a smart move + change over too different power valve shaft linkage

  6. #6
    WE DONT DIAL 911 RDH's Avatar
    Join Date
    Jan 2007
    Location
    LAKE TRAVIS
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    1,862
    go premix,,, dont worry about what the tech at the desk says...

    send the crank to crankworks, they'll fix that one up ......

    it depends on how bad the marks are whether or not you gotta replace the jug....

    get waveeater clips for the powervalves, thats the cheapest way to fix the problem....

    usually since the 03 has the 2" extension this doesnt happen very often,,,normally its a 1200 crank that breaks,, but you could get a front crank snout support,, even if you dont go bigbore... its good insurance.... http://www.greenhulk.net/forums/showthread.php?t=34375
    Last edited by RDH; 07-28-2008 at 12:37 PM.

  7. #7

    Join Date
    Jul 2008
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    cleveland
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    11

    #3 cylinder


  8. #8

    Join Date
    Jan 2007
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    Milwaukee, Wisconsin, United States
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    773
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    i svr s good core crank it just blew rod bearing , I had gotten a used oem short block that is why I have it.

    Cycl are sold but I have crank and cased if you want to buy em. Id give em to ya but ai need to pay back the creditcard that i used to get my 05 running.

  9. #9

    Join Date
    Jan 2007
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    Milwaukee, Wisconsin, United States
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    isnt crankworks in Wisconsin? I live in wisconsin so I can ship it up to him and than he can ship to you once done. His turn around with crank in hand is about 10 days,

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