Ferrarimx5
New member
This is what I have:
a 1993 Evinrude 40HP twin
on a 1993 Bass tracker TX-17
31 MPH @ 5200 RPM with 17 pitch Prop (GPS)
31 MPH @ 5800 RPM with 15" Prop (GPS)
Recommended RPM range is 4,500 to 5,500 RPM for the 40HP <-- I have the 40 hp
Here is my question:
Since this is the lowest horse power rating for the 737 CC family of Evinrude engines (40, 48, 50, 60 HP) and the rpm range of the 60 appears to top out at 6,000 rpm, am I hurting this engine by running the 15" Pitch at 5,800 WOT?
I tend to run WOT about 30 percent of the time and only about 80 percent of WOT for most other adventures. (4,500 rpm)
I fish..
But I also like to skip across the water..
I like the 15" pitch, but am worried I might possibly be over-revving.
(It is also interesting to note that I might actually be gaining 1 MPH at times with the 17" Pitch, but only occasionally and only when I have it trimmed just right). (GPS)
If the 60 HP Evinrude 737cc motor has basically the same parts (Pistons, Rings, Head) as the 40, then is it safe to figure this 40 HP motor can spin like its more powerfully tuned, same size brother?
Some have suggested that running at this higher RPM is actually easier on the 40 HP motor than running the higher pitch at 5,000rpm
Your opinions will help me greatly.
Thank you in advance...
a 1993 Evinrude 40HP twin
on a 1993 Bass tracker TX-17
31 MPH @ 5200 RPM with 17 pitch Prop (GPS)
31 MPH @ 5800 RPM with 15" Prop (GPS)
Recommended RPM range is 4,500 to 5,500 RPM for the 40HP <-- I have the 40 hp
Here is my question:
Since this is the lowest horse power rating for the 737 CC family of Evinrude engines (40, 48, 50, 60 HP) and the rpm range of the 60 appears to top out at 6,000 rpm, am I hurting this engine by running the 15" Pitch at 5,800 WOT?
I tend to run WOT about 30 percent of the time and only about 80 percent of WOT for most other adventures. (4,500 rpm)
I fish..
But I also like to skip across the water..
I like the 15" pitch, but am worried I might possibly be over-revving.
(It is also interesting to note that I might actually be gaining 1 MPH at times with the 17" Pitch, but only occasionally and only when I have it trimmed just right). (GPS)
If the 60 HP Evinrude 737cc motor has basically the same parts (Pistons, Rings, Head) as the 40, then is it safe to figure this 40 HP motor can spin like its more powerfully tuned, same size brother?
Some have suggested that running at this higher RPM is actually easier on the 40 HP motor than running the higher pitch at 5,000rpm
Your opinions will help me greatly.
Thank you in advance...
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