Join Date: Jun 2008
Location: Fort Lauderdale, Florida
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Yanmar 3GM30F low RPM in forward
Hey friends - have a puzzle I'm trying to solve and would like some help......my engine starts up easily and runs great in neutral - smooth and quiet and will rev to 3,000 RPM easily; in reverse runs smooth and will rev to about 2,800 RPM; in forward, however, will only rev to a little under 2,000 RPM.....generates some white / grey smoke at that point but not excessive.
Transmission is Kanzaki KM2P, fluid is topped up and clean. All filters are new.
The problem has developed over the last 6 months or so.....first noticed it when coming in at the end of the day when the engine felt like it was losing some power in forward. Has gotten progressively worse since then.
Any thoughts on cause or things to check out?
S/V Everlasting Moon
1981 Endeavour 32
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Last edited by bigdogandy; 02-05-2017 at 05:09 PM.
Reason: changed "neutral" to "reverse"....thanks hellosailor!