Engine model 917.275820

NEAL1940

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Engine pumps oil up into the fuel pump, is this a problem with reed breather/ passage (PCV ??).
 

bertsmobile1

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The float valve in the carb has failed and allowed the crank case to fill with fuel.
Remove the carb and clean the float valve & seat.
Replace the fuel filter.
have a look at what is in the float bowl if there is little bits f rubber in there, replace the fuel lines
Replace the oil, run the engine a few minutes then replace the oil & filter is there is one.
 

Scrubcadet10

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Check your oil level, and smell for gas in the oil.
EDIT: I now see what bert posted. X2 on what he said.
 
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