Don,
  I had the exact same problem with my Yanmar 3QM30 engine. Over time
the problem continually got worse. I pulled the tranny and many of the
plates inside were worn. Another contributing factor was a very
clogged internal brass filter. I am currently cruising and had the
tranny rebuilt on Borneo for $600 US dollars. It works like a charm
now.
Hope this helps,

Bill Wiggins
S/v Jipz Rose
Baba 35

--- Don Van Valkenburg <valkenburg@verizon.net> wrote:

> I had a strange experience when I was motoring on Lake Washington
> last
> weekend. Situation; no wind, engine about half power and I pushed
> forward the throttle. Boat started accelerating at first, then the
> feeling of total loss of power(boat slowing) with the sound of an
> increase of engine rpm at the same time. If I was in a car, I would
> say
> the clutch is slipping. I backed off the power and went back into my
>
> slip without further incident. What could have been slipping? I
> have
> noticed the F-N-R lever is sluggish and it is sometimes difficult
> finding neutral.
>
> Any ideas?
> Thanks in advance,
> Don
> La Gitana - Baba 30
>
>
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Received on Fri Apr 20 05:07:37 2007