jim18611865
Regular Contributor
Yesterday was day one of season 4 for this setup.
A month ago I got the tach in finally.
4600 RPMs was the highest we got it to. (25 mph with gps unit)
This was after shifting passengers to the back.
4200 RPMs with two people up front, and two in the driver area. (22 mph)
Boat specs.
1968 Tri hull. 1200 lbs.
Rated for 110 HP and 2000 lbs total.
There were 4 people aboard 600 lbs total.
14 gallons of fuel approx 110 lbs
Everything else approx 200 lbs.
Total load was less than 1000 lbs.
We ran out about 8 of those gallons, as the objective was to get rid of the winterized fuel.
Prop is a 13 3/4 X 15 that is not perfect.
I had previously tested a 13 1/4 X 17 which I beleive was the original size.
Original's hub was bad so I did test a new 13 1/4 X 17. RPMs and speed were both lower.
Sold the prop.
I'm not looking for more speed I just don't want to hurt anything.
My questions are;
1 Will running at 4600 hurt anything? (5000 to 5500 is preferred according to the manual)
2 Any other suggestions for prop?
3 Is this just too much boat for this engine?
I'm am open to other suggestions as well.
I will try to test with just myself in the boat at some point.
A month ago I got the tach in finally.
4600 RPMs was the highest we got it to. (25 mph with gps unit)
This was after shifting passengers to the back.
4200 RPMs with two people up front, and two in the driver area. (22 mph)
Boat specs.
1968 Tri hull. 1200 lbs.
Rated for 110 HP and 2000 lbs total.
There were 4 people aboard 600 lbs total.
14 gallons of fuel approx 110 lbs
Everything else approx 200 lbs.
Total load was less than 1000 lbs.
We ran out about 8 of those gallons, as the objective was to get rid of the winterized fuel.
Prop is a 13 3/4 X 15 that is not perfect.
I had previously tested a 13 1/4 X 17 which I beleive was the original size.
Original's hub was bad so I did test a new 13 1/4 X 17. RPMs and speed were both lower.
Sold the prop.
I'm not looking for more speed I just don't want to hurt anything.
My questions are;
1 Will running at 4600 hurt anything? (5000 to 5500 is preferred according to the manual)
2 Any other suggestions for prop?
3 Is this just too much boat for this engine?
I'm am open to other suggestions as well.
I will try to test with just myself in the boat at some point.