Dennis wrote:

Hi Roger and everyone who replied!

Thanks so much for the constructive feedback!

Couple of points to clarify:
- I forgot to mention, the gear ratio is about 1:2.06 (can't read the

I think your gear ratio should be closer to at least 3.0. Your transmission

sounds like it is configured for a planing power boat.

Sherwin D.


label on the gearbox)
- I recently had the bottom done completely - it is as smooth as it
gets.
- I also had the propeller checked by the manufacturer and they
confirmed that the pitch is what it has been manufactured at.
- I have a brand new shaft and coupler and these are properly
connected.

So, I guess my best bet is to check the transmission. Now, how do I do
that?
- Can I check the clutch/transmission without disassembling everything?
Any ideas?
- Can I check and repair the transmission without hauling the boat out
of the water?
- I also notice that there is a very high pitch noise from the engine
after about 3700rpm until the max. rpm. Could that also indicate a
toasted transmission?

Thanks again!
Dennis

"sherwindu" wrote

I think your gear ratio should be closer to at least 3.0. Your
transmission

sounds like it is configured for a planing power boat.

No, that's a fairly typical reduction for a sailboat. The greater the
reduction, the larger the prop. Sailboats usually compromise
effeciency under power with smaller reduction ratios and props in
order to reduce drag under sail.

--

Roger Long

The analogy with an outboard may not carry over to an inboard, but on my
sailboat
there is a distinctive improvement in performance using a 'pusher' type engine
gearing. Most outboards that do specify their use on sailboats usually have
gear
ratios 3.0 or higher. The best pusher I ever used was my British Seagull 6
bladed
prop with a gear ratio of about 4:1, and I saw pictures of this engine pushing
huge
heavy barges.

Roger Long wrote:

"sherwindu" wrote

I think your gear ratio should be closer to at least 3.0. Your
transmission

sounds like it is configured for a planing power boat.

No, that's a fairly typical reduction for a sailboat. The greater the
reduction, the larger the prop. Sailboats usually compromise
effeciency under power with smaller reduction ratios and props in
order to reduce drag under sail.

--

Roger Long