Yam G8 gas, blowing oil through crankcase vent

Kenlhlp · 09-15-2018, 11:27 AM

Guys,

I have a G8 blowing oil out of the crankcase vent hose at high rpm. No smoke from the exhaust. Any ideas what's causing this.

Thanks,

ken

cgtech · 09-15-2018, 11:29 AM

Which hose?

sho305 · 09-16-2018, 07:49 PM

Does it only have 1 qt of oil in it? Never fill according to the stick, only put 1 qt that is full. Too much oil the airbox hose from the rocker cover is first place it will go.

Kenlhlp · 10-01-2018, 09:44 AM

It is blowing oil from the air box hose. The oil level is right at the full mark on the dip stick.

CP241 · 10-01-2018, 11:22 AM

is it lifted? If so then full on the dip stick is WAY overfull.

Drain the oil, and put in exactly 1 quart. Then mark the dipstick where the oil line is with 1 quart of oil. This is your "real" full mark. anything above that is overfilled

Kenlhlp · 10-02-2018, 09:57 AM

The cart is not lifted.

Thanks,
Ken

Kenlhlp · 10-05-2018, 11:27 AM

Drained the oil and added just one quart. I am able to drive around now with no oil blow. The engine will not run at full throttle. Acts like blow back through the carburetor at full throttle. Checked compression it is 150psi. Carb new. governor set correct.

09-15-2018, 11:27 AM	#1
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77	Yam G8 gas, blowing oil through crankcase vent Guys, I have a G8 blowing oil out of the crankcase vent hose at high rpm. No smoke from the exhaust. Any ideas what's causing this. Thanks, ken
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77

09-15-2018, 11:29 AM	#2
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Yam G8 gas, blowing oil through crankcase vent Which hose?

09-16-2018, 07:49 PM	#3
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,443	Re: Yam G8 gas, blowing oil through crankcase vent Does it only have 1 qt of oil in it? Never fill according to the stick, only put 1 qt that is full. Too much oil the airbox hose from the rocker cover is first place it will go.

10-01-2018, 09:44 AM	#4
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77	Re: Yam G8 gas, blowing oil through crankcase vent It is blowing oil from the air box hose. The oil level is right at the full mark on the dip stick.
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77

10-01-2018, 11:22 AM	#5
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: Yam G8 gas, blowing oil through crankcase vent is it lifted? If so then full on the dip stick is WAY overfull. Drain the oil, and put in exactly 1 quart. Then mark the dipstick where the oil line is with 1 quart of oil. This is your "real" full mark. anything above that is overfilled

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10-02-2018, 09:57 AM	#6
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77	Re: Yam G8 gas, blowing oil through crankcase vent The cart is not lifted. Thanks, Ken
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77

10-05-2018, 11:27 AM	#7
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77	Re: Yam G8 gas, blowing oil through crankcase vent Drained the oil and added just one quart. I am able to drive around now with no oil blow. The engine will not run at full throttle. Acts like blow back through the carburetor at full throttle. Checked compression it is 150psi. Carb new. governor set correct.
Kenlhlp Getting Wild Join Date: Nov 2015 Posts: 77

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