Prop for a JAE .21GT

[Bill Gibson]

Whats a good prop to start with for this boat? The engine is a Nova Rossi 7 port .21......stock!

 

[shoboat]

Bill,

I would suggest a 1815 or 1817 to start with.
The 1815 will break-in the motor perfectly, and then the 1817
will let it really run. If you shorten your pipe after break-in
the 1815 is still a fast propeller with plenty of rpm in that motor.
The motor likes a Irwin S-pipe at 8” or less. Just a few suggestions.

Thanks For Reading,

Mark Sholund

 

[Bill Gibson]

Bill,

I would suggest a 1815 or 1817 to start with.
The 1815 will break-in the motor perfectly, and then the 1817
will let it really run. If you shorten your pipe after break-in
the 1815 is still a fast propeller with plenty of rpm in that motor.
The motor likes a Irwin S-pipe at 8” or less. Just a few suggestions.

Thanks For Reading,

Mark Sholund

Thanks so much Mark! I was hoping you would chime in! If you ever hear of or come up with a good prop for a UL 19, I will gladly get one from you! That being said, the stock one that comes with the boat does seem to work well.

 

[shoboat]

Bill,

Is the stock propeller close to a 1715? or 1716?
43 mm with a 1.5 or 1.6 pitch ratio?

Thanks,

Mark Sholund