Troll n Toll
Recruit
- Joined
- May 21, 2014
- Messages
- 3
Fist Time, Long Time... Thank you to all the starcraft renovators on here for ideas with my Holiday project!
BTW, An "Error" window keeps popping up, if I hit backspace at the same time as the window pops up it sends me back to the main forum page and I have to start my post over again. 3rd time is the charm!
I have a 2006 Yamaha 9.9hp High Thrust that I use as kicker on a Starcraft Holiday V5 22ft. WOT is 4-6mph
I use the same engine to power my duck boat, a Starcraft Jetstar 15ft. WOT is 6-8mph. (I built a transom bracket to compensate for long shaft motor). The boat is just shy of planning off at WOT.
Prop: 3 blade aluminum, large diameter high thrust model, I haven't pulled the prop to read pitch. It appears to be a very high pitch.
Questions:
#1) Is it damaging to the motor to run WOT on the small boat. Maybe there isn't enough weight resistance to keep the rpm's in check. (I don't have an rpm reading device)
#2)I think I can use one motor to meet the performance needs of both boats by having two different props. Should I decrease pitch and keep same diameter to gain speed on the smaller boat?
My goal is to have one motor for two boat uses. Just change props as need be.
There seems to be plenty of power to push the small boat, but the throttle limits the prop from spinning fast enough to get on plane. I think that decreasing pitch will push the boat faster and up onto plane.
I think a small diameter prop would have higher slip and less resistance, causing even higher rpms.
I'd rather not spend money on multiple props to find out later that it was the wrong move. It doesn't need to be a perfect match, just "good enough"
Any help is greatly appreciated.
Thanks
BTW, An "Error" window keeps popping up, if I hit backspace at the same time as the window pops up it sends me back to the main forum page and I have to start my post over again. 3rd time is the charm!
I have a 2006 Yamaha 9.9hp High Thrust that I use as kicker on a Starcraft Holiday V5 22ft. WOT is 4-6mph
I use the same engine to power my duck boat, a Starcraft Jetstar 15ft. WOT is 6-8mph. (I built a transom bracket to compensate for long shaft motor). The boat is just shy of planning off at WOT.
Prop: 3 blade aluminum, large diameter high thrust model, I haven't pulled the prop to read pitch. It appears to be a very high pitch.
Questions:
#1) Is it damaging to the motor to run WOT on the small boat. Maybe there isn't enough weight resistance to keep the rpm's in check. (I don't have an rpm reading device)
#2)I think I can use one motor to meet the performance needs of both boats by having two different props. Should I decrease pitch and keep same diameter to gain speed on the smaller boat?
My goal is to have one motor for two boat uses. Just change props as need be.
There seems to be plenty of power to push the small boat, but the throttle limits the prop from spinning fast enough to get on plane. I think that decreasing pitch will push the boat faster and up onto plane.
I think a small diameter prop would have higher slip and less resistance, causing even higher rpms.
I'd rather not spend money on multiple props to find out later that it was the wrong move. It doesn't need to be a perfect match, just "good enough"
Any help is greatly appreciated.
Thanks