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Old 18-04-2023, 16:23   #16
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Re: Nassau, Yanmar Diesel Service?

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Originally Posted by Rastarea View Post
Hi, I just arrive in Nassau today. When I left this morning the engine could not give me more than 2000rpm and anyware above 1700 the exhaust water is BLACK, unburned diesel I belive. Look like an engine overload according to the shop manual (air filter is OK).

I would like to find a reliable Nassau Yanmar service diesel mechanic if you know any??? (so I can sail down to the Exumas!!!)

Sylvain
Hello, I discovered this all thread by you, and I am having exactly the same problem. I would greatly appreciate it. If you would let me know how the problem was resolved. I’m also in the Bahamas right now, and I am at a loss about what to do.
Thank you very much!
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Old 18-04-2023, 16:37   #17
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Re: Nassau, Yanmar Diesel Service?

Check posts #14 and #15, just above your post.
In this case, the exhaust elbow was removed, had it cleaned and the problem was solved.
Hope your problem is as simple to solve.
They also talk about other things to check earlier in the thread.
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Old 18-04-2023, 16:38   #18
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Re: Nassau, Yanmar Diesel Service?

Thank you very very much!
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Old 18-04-2023, 16:41   #19
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Re: Nassau, Yanmar Diesel Service?

I just got a notification on my smart-phone (that barely existed at the time I wrote this message LOL), somebody answered my message !! This was, what, 13 years ago!


That condition is the result of engine overload. First check that nothing is twisted around the propeller, like a rope.


In my case the problem was a clogged exhaust elbow, it made restriction to the engine. It is a 90deg elbow between the engine and the flexible exhaust hose. It has an inlet for water, like 3/4 inch hose. I removed it, and cleaned it with a long flat screwdriver and a steel brush. Clogged by hard carbon deposit. Later, back in USA, I bought a new one.


Hope this help, good luck.
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Old 18-04-2023, 17:44   #20
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Re: Nassau, Yanmar Diesel Service?

Thank you very very much!
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Old 18-04-2023, 17:58   #21
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Re: Nassau, Yanmar Diesel Service?

Google "yanmar exhaust mixing elbow cut open" then click "images" and have a look at what you will be dealing with. Been there, done that, I now carry a complete spare and gasket.
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Old 18-04-2023, 18:31   #22
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Re: Nassau, Yanmar Diesel Service?

Thank you!
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