cabovic216
Cadet
- Joined
- Apr 26, 2011
- Messages
- 15
I replaced a 15 Hp Mercury (year 2001 long shaft) with a 2005 Yamaha (year 2005 long shaft), and it seems the Merc. was a lot faster (on a Lund 14 ft aluminum).
The Yamaha has a prop 9 1/4"x11, and unfortunately I failed to look at the prop size
of the Mercury and already sold it.
I've heard both arguments that to improve speed/performance I should go to a higher
pitch prop, and also that dropping to a lower pitch prop would raise the RPMs, thus
increasing the speed. Of course this scares me, because I could blow up the engine.
Does anyone know what the 'normal' prop size is that comes with a 15 Hp 4 Stroke
Outboard ? Any comments on whether I should move to a higher or lower pitch prop ?
How about 3 vs 4 blade ?
Thank you in advance
Rds
Cabovic
The Yamaha has a prop 9 1/4"x11, and unfortunately I failed to look at the prop size
of the Mercury and already sold it.
I've heard both arguments that to improve speed/performance I should go to a higher
pitch prop, and also that dropping to a lower pitch prop would raise the RPMs, thus
increasing the speed. Of course this scares me, because I could blow up the engine.
Does anyone know what the 'normal' prop size is that comes with a 15 Hp 4 Stroke
Outboard ? Any comments on whether I should move to a higher or lower pitch prop ?
How about 3 vs 4 blade ?
Thank you in advance
Rds
Cabovic