The other day after picking up the anchor
we noticed that at certain RPMs the engine
would shake uncontrollably (shakes the whole boat). The RPM
at which the shaking happens changes after we have idled the boat
for a while, or been in reverse. In reverse the engine
has always shaken, now it is worse.
If we put the engine in neutral and rev up the RPMs the engine is quiet (very in comparisson to in Forward or reverse). Since we have an outdrive it can't be a bent prop shaft and I'm doubting missalignement given it is inconsitent about which RPM
it hapens at.
Anybody have any ideas as to what is going on? We suspect it is the transmission
, but I'm at a loss to explain it. We have a Yanmar
3GM(D) with a Kanzaki
As a side note: ever since we bought the boat
when engaging in forward we hear a good "clunk" from the engine. Is this related ?
SV Geru - Prout Snowgoose 37' Catamaran