Looking for prop suggestions. (1) I'd like the boat to go as fast as possible given my typical load. Here's my current setup:
2) Prop: Suzuki, stock, aluminum
3) blades/diameter/pitch: 3 x 10 1/4 x 10
4) Wide open throttle RPM and speed with an average load (very helpful) - see below
5) Motor: Suzuki DF 25, 2009, 25 hp V-twin, 2.09 gear ratio
6) Boat: Saturn Inflatable SF470, 2009, 15' (inflatable keel, aluminum floor). Boat weighs 245 lbs, plus 6 gal gas, 152 lbs for motor, about 15 lbs for empty cooler and 10 lbs for anchor for total of about 460 lbs.
With me and my wife, plus the cooler partly filled, It jumps onto plane immediately. It gets to top speed (21 mph GPS) within seconds and hits the red line quickly.
With the same above plus two dive tanks, dive gear for two, and two more people (275 lbs of people), it still jumps onto plane quickly and tops out at 18 mph and hits redline (5500 rpms) which it still gets to quickly.
The engine has a red line range of 4500-5500. I'm not using a whale tail or tabs. My thoughts are I need a higher pitch prop. Suzuki has available pitches of 9 through 15. Which should I go for for max speed when lighter and without bogging down on the above heavy load plus maybe even 200 more pounds?
2) Prop: Suzuki, stock, aluminum
3) blades/diameter/pitch: 3 x 10 1/4 x 10
4) Wide open throttle RPM and speed with an average load (very helpful) - see below
5) Motor: Suzuki DF 25, 2009, 25 hp V-twin, 2.09 gear ratio
6) Boat: Saturn Inflatable SF470, 2009, 15' (inflatable keel, aluminum floor). Boat weighs 245 lbs, plus 6 gal gas, 152 lbs for motor, about 15 lbs for empty cooler and 10 lbs for anchor for total of about 460 lbs.
With me and my wife, plus the cooler partly filled, It jumps onto plane immediately. It gets to top speed (21 mph GPS) within seconds and hits the red line quickly.
With the same above plus two dive tanks, dive gear for two, and two more people (275 lbs of people), it still jumps onto plane quickly and tops out at 18 mph and hits redline (5500 rpms) which it still gets to quickly.
The engine has a red line range of 4500-5500. I'm not using a whale tail or tabs. My thoughts are I need a higher pitch prop. Suzuki has available pitches of 9 through 15. Which should I go for for max speed when lighter and without bogging down on the above heavy load plus maybe even 200 more pounds?
