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  1. #1

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    2nd Burnt PTO Piston

    Anybody got a good read on why this PTO piston that burnt in less then 10 hours of running?
    Mag Cen PTO...PTO is very clean
    Click image for larger version. 

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  2. #2
    johnsonmtz's Avatar
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    You are lean on all 3 cylinders. The PTO is simply the worst and that's why it burned a hole.

    KJ

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Most likely because you never fixed the cause of the first piston failure.

  4. #4

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    Quote Originally Posted by CaptKAK View Post
    Anybody got a good read on why this PTO piston that burnt in less then 10 hours of running?
    Mag Cen PTO...PTO is very clean
    Click image for larger version. 

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Views:	76 
Size:	150.0 KB 
ID:	244566Click image for larger version. 

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Size:	76.4 KB 
ID:	244568Click image for larger version. 

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ID:	244567
    2nd piston same hole? You need to first check crank index, check for an air leak (pressure test the engine, check and rebuild the carbs setting your pop off pressure and ad the new aftermarket fuel pump.

    Just to start with.

  5. #5
    Did you bleed the oil pump

  6. #6
    johnsonmtz's Avatar
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    Quote Originally Posted by crustbuster View Post
    Did you bleed the oil pump
    Bleeding the oil pump is definitely a must if the oil lines are removed/replaced. However, the pictures above are most definitely the result of a lean condition not of oil starvation. If the engine lacked for oil there would be severely scarred walls, pistons, and probably shrapnel on the piston dome from crank bearings disintegrating.

    The OP needs to do a complete fuel system maintenance routine to find and correct his fuel delivery problem. If this isn't corrected, the next piston will do the exact same thing.

    KJ

  7. #7

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    Thanks all for the advise...think I will start over with a new top end after checking out the crank index and pressure. I just had the triple pump installed with the top end...but this time around I think I will do it myself

  8. #8
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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