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Old 04-14-2009
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I have 4,400 hours on my nine year old Yanmar. I think dis-use can be more harmful than use.
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Old 04-14-2009
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Find out what model Yanmar you have, (ie 2GM,2GMF, 2GM20, #GM, etc), then someone here can tell you what the max recommended rpm is, and what the max continuous rated rpm is. Off the top of my head 4000 seems a bit high - my 1982 2GM has a max of 3600.

What speed were you going when it smoked? You likely were near / at hull speed and will not go faster, even if you had a bigger engine!! I think you were pushing the engine a bit too far, and trying to get more speed than it will do continuously.

Engine should be good for years to come. Great that its starts easily!!

As others have said, get a manual, or download one - get familiar with the engine for troubleshootingm, fuel filter changes (and necessary priming), etc.
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Old 04-14-2009
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Originally Posted by NoDestination View Post
What is the mixing elbow? and how do i clean it?
it is an evil and devious part of the exhaust/cooling system that tricked me in to spending 1000s of dollars replacing just about every other part of the engine. Then one day I went to the boat with a flathead screwdriver, used it to remove the hose clamp, and then janmmed said device in to the elbow. Some carbon fell out, put hose and clamp back on... Engine fired up first shot.

I later talked to Yanmar and the do recommend inspect/replace every 3 years (dont quote me on the interval)

good luck with the new boat!
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Old 04-15-2009
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I believe Yanmar recommends replacing the exhaust elbow every 500 hrs. though it is probably not necessary ( just a good cleaning) but I do carry a spare.
3GMD/ 22 hp. and 25 yrs. old still purring!
You start sailing with a bag full of luck and an empty bag of experience. The idea is to fill the bag of experience before you empty the bag of luck.

Last edited by billangiep; 04-15-2009 at 07:23 AM.
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