Whose got an I/O?

[PlumBum]

Prop size, burn rates, speed at WOT, cruise?
Just wonderin how many there are round these parts. I know most people on the board have clip-on's but there have to be a few sterndrives in these waters...

Ill start.
1988 2520 mod-v, 04 Mercruiser 2bbl 5.7(250hp) mated to a Bravo II, no trim tabs.
Prop is 18.25 x 19p 3 blade AL
Top speed is 34 kts @ an unconfirmed 4700rpm
Cruise is 23-26 @ 3300-3500 rpm
Burns around 2.3mpg at cruise speeds.
This is with 3/4 of a tank and 3 people on board (roughly 550lbs)

Just considering a different prop and wondering who's running what....

 

[dcunniff]

96 2530 Volvo 5.7 L fuel injected with DuoProp. Fewer prop choices with Volvo. Tried original B3 and B2. Still on B3 props. That vintage outdrive is aluminum props.

Cruise 3600 rpm 27 mph. About 1.9 mpg.

Trim tabs. 150 gal fuel tank.

Dana

 

[PlumBum]

I knew there were some I/O folks around here. Thanks for the info, I hear the DP is the way to go with a sterndrive or even a Bravo III.
I am digging the Bravo II though, the only problem being prop selection is very limited and REALLY $$$$$. Even an AL prop will set you back $500 or so...

 

[dcunniff]

My set of DuoProp aluminum props is $600-$700. Have gone through a good amount of sets over the years.

In fresh water now, will last longer.