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Old 20-01-2020, 20:33   #46
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Re: I've tried Everything....Yanmar with Sooty exhasut

Quote:
Originally Posted by Compass790 View Post
I often fail to read all the posts as well but check post #15
I'd actually assumed it had been done as the head had been off but thought it was worth a mention too.
Yep, missed that. "tappet clearance" = valve clearance. That wasn't the term I was searching for. Thanks.

Greg
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Old 20-01-2020, 23:04   #47
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Re: I've tried Everything....Yanmar with Sooty exhasut

Also just check your tachometer readings with a portable laser unit. I found mine was under reading by 4-500 rpm and that was giving me incorrect readings. Hence the smoke when at higher cruising rpms
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Old 20-01-2020, 23:44   #48
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Re: I've tried Everything....Yanmar with Sooty exhasut

Our previous study about 10% blend of coconut-based, lipase-catalysed ethyl ester biodiesel with diesel demonstrated a potential of reduced smoke and NOx emissions while keeping the brake power of a conventional diesel
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Old 21-01-2020, 08:51   #49
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Re: I've tried Everything....Yanmar with Sooty exhasut

I had a situation where one of the pistons in the injector pump was sticking. The engine was pumping out clouds of dry, powdery soot which was literally piling up. If I cracked one pressure pipe, it would stop, then restart as I went past a certain rev threshold. Rinse, repeat. I cured it by taking the cap off that piston and repeatedly tapping it down with a hammer and brass rod. It is more likely being cause by a constriction in the air flow though. Try running without an open inlet manifold.
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Old 21-01-2020, 13:04   #50
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Re: I've tried Everything....Yanmar with Sooty exhasut

What happens when you run with the engine compartment hatch open? It could be as simple as not having enough airflow when everything is closed up and you are running at higher power. I know that such things are supposed to be calculated by an engineer before building the boat, but things get overlooked. Or things get changed between engineering/design and construction/marketing.
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