prop size
 

have a 5 hp merc would a lesser pitch give more torqe on an Aquarius 23?

prop size
 

chris wrote:
have a 5 hp merc would a lesser pitch give more torqe on an Aquarius 23?

less pitch will give more torque on any engine, and slower speed.

joe

prop size
 

chris wrote:
have a 5 hp merc would a lesser pitch give more torqe on an Aquarius 23?


Not exactly. The amount of torque developed by the engine
isn't going to change. What will happen is that the lesser
pitched prop will move water more slowly, although more of it.

The real question is, will it drive the boat better? To
answer that you should have a good idea of how fast the boat
is moving at the engine's peak RPM. Does the engine fail to
get up near redline, with the boat scooting along and making
a large stern wave? If yes, then less pitch is exactly what
you need. Or if the prop stream is a lot of froth & bubbles
and the boat is not really being driven (this is less likely
IMHO).

If the engine is getting up near it's top end, and the boat
isn't going as fast as you'd like, what you need is a bigger
diameter prop (and possibly less pitch) which may or may not
fit on your Merc drive leg.

Hope this helps

Fresh Breezes- Doug King

prop size
 

"DSK" wrote in message
...
chris wrote:
have a 5 hp merc would a lesser pitch give more torqe on an Aquarius 23?

Not exactly. The amount of torque developed by the engine isn't going to
change. What will happen is that the lesser pitched prop will move water
more slowly, although more of it.

The real question is, will it drive the boat better? To answer that you
should have a good idea of how fast the boat is moving at the engine's
peak RPM. Does the engine fail to get up near redline, with the boat
scooting along and making a large stern wave? If yes, then less pitch is
exactly what you need. Or if the prop stream is a lot of froth & bubbles
and the boat is not really being driven (this is less likely IMHO).

If the engine is getting up near it's top end, and the boat isn't going as
fast as you'd like, what you need is a bigger diameter prop (and possibly
less pitch) which may or may not fit on your Merc drive leg.

Hope this helps

Fresh Breezes- Doug King


It must be of lesser pitch AND larger diameter. There's a limit to prop size
on the merc 5.

prop size
 

Bob Crantz wrote:
It must be of lesser pitch AND larger diameter.

To do what?

... There's a limit to prop size
on the merc 5.


Exactly. Didn't I say that? Sometimes I can't tell ;)

DSK

prop size
 

"DSK" wrote in message
. ..
Bob Crantz wrote:
It must be of lesser pitch AND larger diameter.

To do what?

Increase thrust for the same turns.


... There's a limit to prop size on the merc 5.


Exactly. Didn't I say that? Sometimes I can't tell ;)

Well then, I said it too.


DSK

prop size
 

Exactly. Didn't I say that? Sometimes I can't tell ;)


Bob Crantz wrote:
Well then, I said it too.


Yeah, but does anybody listen to us? No, of course not,
they're all too darn smart for that... and look where tehy
end up.

DSK