Posted by Robert Ribley on 04/28/13 - 6:36 PM
#1
1981 15.3 Whaler.
Approximate total loaded weight 1200 lbs
Engine - 1981 Evinrude 70 hp, strong motor.
#1 cylinder- 144 lbs
#2 cylinder - 143 lbs
#3 cylinder - 143 lbs
Cobra planing fin
C & M 6" setback jack plate
Engine mounting height: anticavitation plate 3 1/4" above keel
Current prop: Solas, aluminum 15 x 13 3/4
Engine over revs and prop blows out on corner
Objectives:
To get WOT between 5000 - 6000 rpm
Good hole shot to get skier up.
Lower planing speed
To produce as flat a wake as possible between 28 - 32 mph
To avoid blow out on turns
Prop that I thought might work well for my objectives
Stilleto Advantage 1 15 (that would probably run like a 17?)
This Whaler is new to me but what I've read is the 15 likes air time which also would mean a flatter wake
Any help or recommendations are appreciated - especially Tom C's.
Robert
Edited by Joe Kriz on 04/28/13 - 6:38 PM
Posted by Tom W Clark on 04/29/13 - 7:00 AM
#2
A 1981 Evinrude 70 has 5500 RPM redline and a 2.42:1 gear ratio. It will probably not be able to make us of a 13-1/4" x 15" Stiletto Advantage AND full throttle.
You'll want the 13-1/4"x 17" Advantage instead.
Posted by Robert Ribley on 04/29/13 - 8:44 PM
#3
Thanks for the advice, Tom. I'll look into that.
Robert