I have a 2005 yamaha 250 four stroke with 315 hours. All service has been done properly to date.
I was fishing a few days ago and on our second day on the way, I started running WOT. I rarely do this but we were pushing getting in by dark.
After running WOT for about a minute, the engine started to run a little rough, I looked back and noticed it was blowing smoke. I could see two different places within 200yds that it has blown some white smoke. When I came to idle, it was running pretty rough and smoking. I shut it off and removed the cowling.
All looked normal, I checked the oil after a few minutes and all looked fine...i.e.. it was not dark and it was Full.
After a couple more minutes, I cranked her up and idled for a little while then decided to run on in at cruise speed.
I had no more issues of smoking or running rough.
3 days later once back from trip, I removed the cover again to look around and noticed a minimal amount of oil in a few different places in the bottom of the engine and scattered around some of the gaskets on the hoses in the motor.
I have tried several things including running engine with cowling off to see if I could find a leak... also, have tried trimming it up and down.
I cant find a leak anywhere. I cleaned up all the oil and am gonna check again tomorrow to see if it has dripped again.
Any ideas as to what could be going on?
Btw, when I crank her up now, she sounds just as perfect as ever.
Thanks.
Joe
I was fishing a few days ago and on our second day on the way, I started running WOT. I rarely do this but we were pushing getting in by dark.
After running WOT for about a minute, the engine started to run a little rough, I looked back and noticed it was blowing smoke. I could see two different places within 200yds that it has blown some white smoke. When I came to idle, it was running pretty rough and smoking. I shut it off and removed the cowling.
All looked normal, I checked the oil after a few minutes and all looked fine...i.e.. it was not dark and it was Full.
After a couple more minutes, I cranked her up and idled for a little while then decided to run on in at cruise speed.
I had no more issues of smoking or running rough.
3 days later once back from trip, I removed the cover again to look around and noticed a minimal amount of oil in a few different places in the bottom of the engine and scattered around some of the gaskets on the hoses in the motor.
I have tried several things including running engine with cowling off to see if I could find a leak... also, have tried trimming it up and down.
I cant find a leak anywhere. I cleaned up all the oil and am gonna check again tomorrow to see if it has dripped again.
Any ideas as to what could be going on?
Btw, when I crank her up now, she sounds just as perfect as ever.
Thanks.
Joe