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Thread: fuel in oil

  1. #1
    Kiwi spanner handler
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    fuel in oil

    Just pulled a motor down that we run in an alloy jetboat (04 rxp motor) which was breathing heavily and pushing oil out the breather.
    Main thing i noticed is the oil is very diluted with fuel and the bores looked washed,otherwise pistons/rings/bearings all as good as new (engine done 20-30 hours)
    Main question is has anyone had injectors leak this badly (i will get them tested) and is there a chance the ecu is over fueling due to open cooling and low running temps? Or any chance it was never run in from the start?
    It has stock ecu/injectors/regulator and only mods are air filter ([email protected]) and waterbox cut down
    The motor was still running strong at 8150rpm and no other symptoms

    Thanks for any input I will re ring and hone it and make sure the injectors are good then run it in properly.


  2. #2
    Kiwi spanner handler
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    Bump.
    Rings arrive tomorrow so need to find cause of problem before runing it again.

  3. #3
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by jasonze View Post
    is there a chance the ecu is over fueling due to open cooling and low running temps?
    Very good chance. What is your engine operating temps? If you aren't maintaining 165-175 then there is a very good chance you are running way too rich.

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