Smoking GX444 with good compression and correct amount of oil

Marathon · 10-22-2012, 07:27 PM

I have a 1991 Marathon with a 295, I just bought. It smokes pretty bad. I have done a compression test 165 p.s.i. each cylinder and have perfromed and leakdown test. I am between 5% leakage, which is well with-in the limit. The cart is lifted, I have drained and measured 1.5 quarts of oil. I have oil in the air box coming up through the crankcase breather, which indicates bad rings, yet my Snap-on leakdown tester says there fine. Valves are adjusted to .004" What's the deal?

tradermark · 10-22-2012, 09:08 PM

I'm no expert with these robin engines but I do know that with most other engines it is possible to have good compression rings but damaged or broken oil control rings. I've seen it happen with gas and diesel engines. Just a thought.

Mark

Marathon · 10-23-2012, 04:46 AM

That's a good thought, that's definetly something to look for if I have to tear it down. I am looking for a service manual for this model, I can't find one on this site for my specific model, anyone know where to find one?

10-22-2012, 07:27 PM	#1
Marathon Not Yet Wild Join Date: Oct 2012 Posts: 3	Smoking GX444 with good compression and correct amount of oil I have a 1991 Marathon with a 295, I just bought. It smokes pretty bad. I have done a compression test 165 p.s.i. each cylinder and have perfromed and leakdown test. I am between 5% leakage, which is well with-in the limit. The cart is lifted, I have drained and measured 1.5 quarts of oil. I have oil in the air box coming up through the crankcase breather, which indicates bad rings, yet my Snap-on leakdown tester says there fine. Valves are adjusted to .004" What's the deal?
Marathon Not Yet Wild Join Date: Oct 2012 Posts: 3

10-22-2012, 09:08 PM	#2
tradermark Not Yet Wild Join Date: Aug 2012 Location: Southeast Georgia Posts: 35	Re: Smoking GX444 with good compression and correct amount of oil I'm no expert with these robin engines but I do know that with most other engines it is possible to have good compression rings but damaged or broken oil control rings. I've seen it happen with gas and diesel engines. Just a thought. Mark

10-23-2012, 04:46 AM	#3
Marathon Not Yet Wild Join Date: Oct 2012 Posts: 3	Re: Smoking GX444 with good compression and correct amount of oil That's a good thought, that's definetly something to look for if I have to tear it down. I am looking for a service manual for this model, I can't find one on this site for my specific model, anyone know where to find one?
Marathon Not Yet Wild Join Date: Oct 2012 Posts: 3

Similar Threads
Thread	Forum
88 Ezgo 2 cycle, no power good compression	Gas EZGO
G1 compression testing, correct way?	Gas Yamaha
yamaha g1 79-83 whats correct compression	Gas Yamaha
1984 ez-go gas starts great good compression, no power	Gas EZGO
G9 smoking but has good compression	Gas Yamaha

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum