Moderated Discussion Areas
ContinuousWave: Whaler Performance
Oil substance coming from exhaust
|Author||Topic: Oil substance coming from exhaust|
posted 02-22-2004 04:19 PM ET (US)
1987 Yamaha Pro 50. No problems until now that I've noticed a murky, brownish, oily substance coming out of the prop when in idle. Is this a piston ring issue or perhaps something not quite so traumatic?
Thanks for any (not so traumatic) news!
posted 02-23-2004 11:53 AM ET (US)
Blown rings would increase emissions, but you'd be noticin' other problems with the engine's performance, i.e. loss of power, below-spec compression. A quick, cheap check with a compression gauge will confirm the status of your rings. This sounds just like a normal 2-cycle emission to me.
posted 02-23-2004 12:23 PM ET (US)
Hooter is right.
It's just the unburned oil mixed at 50,1 when at idle only needs approx 150.1.
This happens when idling for long periods of time, like slow trolling or having to idle a long way in no wake zones.
posted 02-23-2004 01:48 PM ET (US)
Probably time to rebuild carbs being a 1987. She is probably gumed up a bit and maybe running too rich at low speeds. Better to be rich than lean.
posted 02-26-2004 05:05 PM ET (US)
If it is light in color I would check the lower unit gear lube, could have a bad seal.
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.