Gas in oil

Phantom59 · 01-26-2013, 01:34 PM

Has anyone had a problem with the 20hp Honda and gas in the oil? I pulled the carb cleaned and checked everything but didn't find anything. Is it possible for the pulse fuel pump to leak fuel into the vacuum tube?

fstg21 · 01-26-2013, 01:39 PM

Check the carb float pin, it's probably worn.

Phantom59 · 01-26-2013, 01:43 PM

Pulled it all out last night and everything looked good

sho305 · 01-27-2013, 02:15 PM

Gas in oil from leaking carb or leaking pulse pump to the crankcase....usually one of those.

Phantom59 · 01-27-2013, 03:48 PM

Thanks I thought it might be the pump but a local shop said it couldn't get through there to the oil

sho305 · 01-27-2013, 04:09 PM

It can if the diaphragm in there goes bad, and usually they are not expensive, if that is the problem and its not the carb.

Phantom59 · 01-27-2013, 04:17 PM

is the pump rebuildable or do I need to buy a whole pump

Phantom59 · 01-30-2013, 02:00 PM

Found a OEM Honda fuel pump for $20 so hopefully that solves the problem and I don't have any damage from the contaminated oil.

Phantom59 · 02-21-2013, 06:12 PM

Replaced the fuel pump and changed oil two times. Took carb back off and double checked parts for wear and seal also set float a bit lower. Have about 1/2 hour run time on new oil and the oil appears to be contaminated again. The engine starts and runs good I can't imagine that much fuel going through the carb and not flooding the engine. I did take the old pump apart and found both sides of the diaphragm wet but couldn't find a hole.

01-26-2013, 01:34 PM	#1
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109	Gas in oil Has anyone had a problem with the 20hp Honda and gas in the oil? I pulled the carb cleaned and checked everything but didn't find anything. Is it possible for the pulse fuel pump to leak fuel into the vacuum tube?
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109

01-26-2013, 01:39 PM	#2
fstg21 Gone Wild Join Date: Sep 2011 Location: ARIZONA Posts: 476	Re: Gas in oil Check the carb float pin, it's probably worn.

01-26-2013, 01:43 PM	#3
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109	Re: Gas in oil Pulled it all out last night and everything looked good
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109

01-27-2013, 02:15 PM	#4
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,445	Re: Gas in oil Gas in oil from leaking carb or leaking pulse pump to the crankcase....usually one of those.

01-27-2013, 03:48 PM	#5
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109	Re: Gas in oil Thanks I thought it might be the pump but a local shop said it couldn't get through there to the oil
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109

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01-27-2013, 04:09 PM	#6
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,445	Re: Gas in oil It can if the diaphragm in there goes bad, and usually they are not expensive, if that is the problem and its not the carb.

01-27-2013, 04:17 PM	#7
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109	Re: Gas in oil is the pump rebuildable or do I need to buy a whole pump
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109

01-30-2013, 02:00 PM	#8
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109	Re: Gas in oil Found a OEM Honda fuel pump for $20 so hopefully that solves the problem and I don't have any damage from the contaminated oil.
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109

02-21-2013, 06:12 PM	#9
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109	Re: Gas in oil Replaced the fuel pump and changed oil two times. Took carb back off and double checked parts for wear and seal also set float a bit lower. Have about 1/2 hour run time on new oil and the oil appears to be contaminated again. The engine starts and runs good I can't imagine that much fuel going through the carb and not flooding the engine. I did take the old pump apart and found both sides of the diaphragm wet but couldn't find a hole.
Phantom59 Getting Wild Join Date: Sep 2007 Posts: 109