2000 Suzuki DF40 has gas in the oil

pschiel

Cadet
Joined
Jul 31, 2017
Messages
6
Hi! I have changed the oil 3 times in the last week and it smells like gas when it's drained. What would cause this? I've let the oil set, it's definitely gas not water because it doesn't separate and smells like gas. It has a new lower pressure fuel
pump and clean fuel injectors. Please help
 

ondarvr

Supreme Mariner
Joined
Apr 6, 2005
Messages
11,527
Probably a bad thermostat, if it never warms up the rings won't seal correctly and it won't get hot enough to evaporate the gas out of the crankcase.

​It's worse if you idle around for long periods of time.
 

pschiel

Cadet
Joined
Jul 31, 2017
Messages
6
We had an issue with it getting fuel and it was the low pressure fuel pump. We changed that. It fixed the problem but now the gas in the oil. People have told us fuel injectors but I don't think that. Is the thermostat easy to change? Where is it located?
 
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