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Craig
 Post subject: Strange engine happening
PostPosted: Sun May 23, 2010 8:10 pm 
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Joined: Sat Oct 10, 2009 10:44 pm
Posts: 12
While motoring today, may engine twice made an odd noise, slowed markedly and let out white smoke, then spontaneously recovered. I checked the Racor to see if there was a lot of water, but no hint of trouble. Any thoughts? P.S. engine is yanmar 3GM
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CrazyRU
 Post subject: Re: Strange engine happening
PostPosted: Sun May 23, 2010 9:33 pm 
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Joined: Fri Feb 06, 2009 3:58 pm
Posts: 44
It looks like engine misfiring. One or two cylinders stopped. White smoke is unburnt fuel, most likely.
There are many reasons for such behavior.
Dirty fuel - some particles got through filters and plugged injector temporarily. or
Injectors are getting old or
High pressure fuel pump is acting funny or
Engine is running cold (thermostat isn't working)
I'd wait until the problem become more permanent.

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CR
s/v "NEMO" - Freedom 28 Cat Ketch centerboard

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THATBOATGUY
 Post subject: Re: Strange engine happening
PostPosted: Tue Jun 01, 2010 8:13 pm 
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Joined: Thu Dec 04, 2008 8:50 am
Posts: 443
Location: F40 CC CK Maryland
You may have picked a piece of line on the prop shaft, temporarily overloading the engine.

George

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RonBarr
 Post subject: Re: Strange engine happening
PostPosted: Sun Jul 04, 2010 11:00 am 
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Joined: Sun May 17, 2009 3:50 pm
Posts: 15
worth changing your injector nozzles, cheaper than rebuild/cleaning and doing it every 3-5 yesrd depending on engine usage seems like a good idea to me

Ron
F32 Newport RI
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JimD
 Post subject: Re: Strange engine happening
PostPosted: Sun Jul 11, 2010 6:04 am 
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Joined: Mon Dec 15, 2008 12:38 pm
Posts: 21
Sounds like a clogged fuel filter.

Jim Demerest
F36/38 Lady of Remes
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