Are you completely sure the motor is running at it's best? You didn't give
much info but I'm thinking at one time the prop you have on it may have been
correct. I agree about the size, you want something between 14 and 14.5. I
think the 15s were common on the bravos. If you want to experiment buy used
props off ebay. You can resell them for about what you paid for them.

"Josh Assing" wrote in message
...
I've never had a tach go bad -- but I'll check it out with my old analog
meter
and see what it ways...

On Sun, 13 May 2007 11:00:35 GMT, Short Wave Sportfishing

wrote:

On Sat, 12 May 2007 13:40:08 -0700, Josh Assing
wrote:

And ten percent of a 15 inch diameter prop would be what?

exactly - -it's not 3 mm


That is way to close for a number of reasons including cavitation.

that's what I thought -- the demo-prop-shop said "it will increase
performance
by directing more water aft rather than up" seemed snake-oilish to me.


What you are looking for is a 14.5/21p or thereabouts - might need a
19p - doubt if you will need a 23.
well; wrong way -- I have 19pitch now; need to go down in pitch to 17 or
16.
(wot now = 4100, need to get it to 4400-4600)

Whoops - sorry - read that wrong. My bad.

I think you are probably close on that, but you might want to consider
having the rpm checked using a meter directly off the engine. I know
when I swapped engines on the Ranger, we couldn't get 5400 top end out
of the gage on the dash, but when we looked at the EMM, it was 5400 on
the nose. It was about the same RPM range you noted.

Threw a new RPM gage in the dash - presto.

Just something to think about.