Originally Posted By: alarmguy
Originally Posted By: claluja
Originally Posted By: alarmguy
Looks good, wear metals are good, I mean that is what we want right?
I am curious, did you run the engines and oil up to full operating temperature when you took the sample for the UOA?
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Thanks for your comments. Yes, took the sample after engines had been run for 8 hours straight, so everything was very hot. Fuel dilution didn't become a problem for these engines until about 700 hours, so I'm thinking (hoping!) they just have some carbon buildup due to all the extended idling and trolling that needs to be burned off.
Ok, got it, understand.
I guess I am saying, give the engines the benefit of the doubt. You have two engines and both reporting the same results.
Even direct injection automotive engines will have fuel dilution and agree, maybe even the extended trolling...
I miss those days, until 11 years ago, spent my entire life on Long Island, NY and boating the Great South Bay, outside of Jones Inlet to Fire Island inlet,
to Blue Fishing off the Ambrose Light Tower outside of NY Harbor.
Bought my first I/O boat at the age of 17, years later worked up foot by foot from all different brands I/Os and O/[censored] then a 268 Sea Ray..
From the first 17 boat, of course carefully watching weather, the calm mornings heading out into the ocean even with the first 17 foot boat, diversity of life was something I always loved. Never did anything with big game fish, never had that type of boat or budget for one!
Even though I have a 41 mile long freshwater lake here now where I live in SC, its just not the same ... sold our boat here some years ago, between work schedule, kids growing up, to now thinking of getting something small for the lake, me and my wife.
I dont know .. just my thoughts on your engines, maybe simply because Yamahas to me, even though I never owned one, are awesome engines....
Spoke to a Yamaha master tech the other day. He said not unusual given all the idling and trolling these engines see (often 6 or 8 hours at a time). He said when this develops at high hours 95% of the time the problem is carbon buildup on the rings, and recommended running it WOT for an hour with a big dose of Ring Free in the tank to try to burn the carbon off. I did that Friday - hoping that will help.
Was able to take the kids fishing Firday and Saturday - ocean sure is addictive!