too much oil (gas in oil)

[nsullivan]

2000 100hp Yamaha 4 stroke. Less than 40 hrs.<br />oil level too high, strong smell of gas in oil. Dealer repaired, said it was thermostat, running too cool. Less than 5 hours since repair and oil is 1" over full on dipstick. When it was in shop another Mercury owner was in for same problem. Merc 4 stroke & Yamaha made by same company?? Anyone else experiencing?

 

[cobra 3.0]

Re: too much oil (gas in oil)

If your oil level is too high correct it. It is very bad to run an engine that has too much oil.

 

[shakespear]

Re: too much oil (gas in oil)

also bad to run engine on diluted oil does not lubricate<br />is fuel pump leaking into sump?

 

[SlowlySinking]

Re: too much oil (gas in oil)

Hi nsullivan, common problem with faulty thermostat, engine runs too cool and choke never fully releases, this puts excess gas in the cylinders which wipes the oil off the rings and the extra gas blows by into the crankcase which is why it checks overfull. Given that two sources pointed out the thermostat it gets easy to diagnose. On cars that tend to be used around town on many short trips the same thing happens, then you check the oil before a long trip, it looks full and it is, but it's oil and gas, you hit the highway, the hot engine burns off the gas from the oil and the engine runs low on oil and self destructs. Moral, always have an operational thermostat.

 

[flashback]

Re: too much oil (gas in oil)

is this an outboard? you may want to post it in the outboard forum............

 

[Spidybot]

Re: too much oil (gas in oil)

SlowlySinking got it.<br /><br />Get it fixed and replace the oil.

 

[JB]

Re: too much oil (gas in oil)

Moving to Yamaha Troubles.