- Joined
- Apr 1, 2002
- Messages
- 4,133
Greetings,
Just returned from running the OS Max RG 21 OB Conversion by done by Tim Fulton at Precision Boats.
Some observations:
1. It takes a few runs to get the motor broken in.
2. The Octura X438 worked better than the X460 cut to 37 mm diameter that runs with my CMB Green Head.
3 The motor pushed my WOF 30 as fast as either the CMB Green Head and MAC 21 that had previously been run on the hull.
4. Due to the onset of windy conditions, the opportunity to test more props was lost.
Some specifics:
1. Exhaust header for PB and Silver Bullit 3.5 tune pipe with film can muffler were used.
2 Wild Cat 65% fuel with castor added for fuel.
3 LawLess lower unit on PB motor mount.
4. C/L of prop 3/16" above bottom of sponson.
5. Prop thrust angle basically neutral.
6. X438 allowed the motor to unwind. X440 might also be a good choice.
Some comments:
O.S. RG is a quality unit. Tim's machine work is excellent. Performance wise, the motor is equal to my CMB Green Head. I never really got the MAC 21 to perform, so cannot make a performace judgement on that.
JD
Just returned from running the OS Max RG 21 OB Conversion by done by Tim Fulton at Precision Boats.
Some observations:
1. It takes a few runs to get the motor broken in.
2. The Octura X438 worked better than the X460 cut to 37 mm diameter that runs with my CMB Green Head.
3 The motor pushed my WOF 30 as fast as either the CMB Green Head and MAC 21 that had previously been run on the hull.
4. Due to the onset of windy conditions, the opportunity to test more props was lost.
Some specifics:
1. Exhaust header for PB and Silver Bullit 3.5 tune pipe with film can muffler were used.
2 Wild Cat 65% fuel with castor added for fuel.
3 LawLess lower unit on PB motor mount.
4. C/L of prop 3/16" above bottom of sponson.
5. Prop thrust angle basically neutral.
6. X438 allowed the motor to unwind. X440 might also be a good choice.
Some comments:
O.S. RG is a quality unit. Tim's machine work is excellent. Performance wise, the motor is equal to my CMB Green Head. I never really got the MAC 21 to perform, so cannot make a performace judgement on that.
JD
