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oldchevyguy
Join Date: Feb 2009
Posts: 11 Foster R.I.
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2009-03-14          161063


My father has a toro tractor with a Koeler engine.Afew monthes ago he complained to me that the tractor was smoking terribly.Apon inspection I found there to be gasoline in the crankcase oil,a lot of it.We changed the oil and inspected the carberator for a bad needle and seat or stuck float but found nothing and considerd it to be a fluke. Today again the tractor was smoking excesivly and was found to have a lot of gas in the oil.If the fuel pump was faulty{there is a mechanical fuel pump bolted to the motor,driven by the cam shaft}and the diaframe was leaking could the gas leak into the crankcase? Has anyone ever had or heard of a simular problem? Thanks Frank



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greg_g
Join Date: Jan 2004
Posts: 1816 Western Kentucky
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2009-03-14          161066


Sure. Used to be quite common on the old mechanical (lever style) fuel pumps. Only solution I ever knew of was simply to replace the failed pump and gasket.

//greg// ....


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kwschumm
Join Date: Feb 2003
Posts: 5764 NW Oregon
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2009-03-15          161067


What Greg says has been my experience too. The only thing keeping fuel from the crankcase on most mechanical pumps is a diaphragm. When that ruptures it leaks right in. ....


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earthwrks
Join Date: Dec 2003
Posts: 3853 Home Office in Flat Rock, Michigan
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2009-03-15          161068


I can remember just 25 years ago driving cars and trucks with that type of fuel pump--and yep, they went too.

In fact my current gasser dump truck has one. ....


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oldchevyguy
Join Date: Feb 2009
Posts: 11 Foster R.I.
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-15          161075


Thanks for the quick replys. I was thinking that could be the problem,I seem to remember cars doing that to.I'm gonna take it off today and check it out and order a new one tomorrow ,thanks again. ....


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ajp2927
Join Date: Feb 2007
Posts: 17 Ponchatoula Louisiana
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2009-07-19          164195


own Sabre lawn tracror did same thing, dealer said he could replace float on carb...but would be cheaper to put shut off valve in fuel line...did that about 6 years ago

ajp ....


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