Logo

1987 Mercruiser 50 Alpha One

whaltiwanger

New member
"I have a 1987 Galaxy 2100 Sho

"I have a 1987 Galaxy 2100 Shooting Star Cuddy cabin boat, with a newer year engine/outdrive.
Mercruiser 5.0 engine, carbureated, with Alpha one outdrive. Not sure of ratio, but probably standard.
My boat at 5200RPM runs about 42MPH, swinging a 13" 3/4 prop, 21 pitch. What other props can I go to to help fuel mileage and overall handling and possibly increasing top speed?
I have been told that I can go to a larger diameter prop, but I am not sure.
Thanks for your help!"
 
"definatley could and should g

"definatley could and should go to a larger prop, maybe even try a 4 blade, say 14.5 x 22p, your WOT should be in the 4200-4800 range, 4800 tops with yourself and a half tank of fuel. I know someone that has a 5.0 2bbl carb and tops 52mph on GPS with a 4 blade 24p Prop by Piranha.. Great on fuel to.. 4 blade 22p 50mph ( but that's on a 20' glastron GX ) with a Volvo Penta, dont remember the gear ratio. They also have a lifetime warranty on the hub, and a great exachange policy on the blades.

The following pic was with a 4 blade 22p Piranha Propeller 5.0L 2bbl Carb 2008 Glastron 20' GX

294456.jpg
rooster
 
Back
Top