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  1. #1

    My piston wash...with pics

    Here it is. I have about 4-5 hours on them with premixing 50-1 and oil injection.





  2. #2

  3. #3
    785 Pro Mick's Avatar
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    I am no expert, but i that running a little lean??

  4. #4
    THe center i think is lean, the front and rear are OK, but mayb a tad on the lean side. Any suggestions on adjusting?

  5. #5
    Was this at WOT? ( i know it wasn't at wot for 4 hours, but right before you took it apart) or just normal driving? Definately enough oil, but I suppose premix and a pump will do that on a fresh motor.

  6. #6
    Quote Originally Posted by CumminsAholic View Post
    Was this at WOT? ( i know it wasn't at wot for 4 hours, but right before you took it apart) or just normal driving? Definately enough oil, but I suppose premix and a pump will do that on a fresh motor.
    no, this was a soid 10 minutes of ideling through a creek to the launch before the pics were taken.

  7. #7
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    The front and rear are a little rich,the middle looks real rich to me. Others will jump in.You should have about a fingernail size of WASH at the ports,Totally washed (no carbon build up means the fuel is washing the top of the pistons clean= rich).

  8. #8

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    i say rich, rich and rich which is good for now that way your keeping it safe

  9. #9
    PolarisNut's Avatar
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    Quote Originally Posted by ryanbgb22 View Post
    no, this was a soid 10 minutes of ideling through a creek to the launch before the pics were taken.
    Idling for that long will change the wash. It will make it appear more rich than it really is, because there isn't much heat in the piston during idle. The fuel starts to wash the carbon right off. You really need to run the boat at the throttle position you are trying to check, and then shut it down right away, and take a look.

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