Boat: 1977 C&C 34
Engine: Yanmar 3GM30 (F)
Prop: 3 Blade Max Prop
Recently I noticed that when engaged in forward-drive, at low RPM, it almost
feels like something is banging against the bottom of the hull, like a piece of
kelp or rope tangled in the prop. Once the RPMs get above 1400 or so the
roughness goes away completely and everything feels very smooth.
Additional info:
+ Looking at the propshaft and listening for knocks coming from the engine
doesn’t reveal anything obvious.
+ We ran aground recently, but just the keel in soft sand. Bottom was painted
between now and then and yard didn’t report anything amiss.
+ In reverse at the same RPMs everything feels pretty smooth.
I’m waiting for the next 80° day to dive under the boat and see what I can see,
but was wondering if that’s even where I should be looking. Does this sound
familiar to anybody else?
Andrew
--
Andrew Means
S.V. Safari - 1977 C&C 34 Mk I
Seattle, WA
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