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ContinuousWave: Whaler Performance
Changing from Stainless to Aluminum
|Author||Topic: Changing from Stainless to Aluminum|
posted 02-26-2003 07:08 PM ET (US)
I have a stainless prop on my 13 with Johnson 40. I have a chance to buy an aluminum prop of the same pitch and diameter. Will I be able to tell a difference in performance and if so, what will the difference be in reference to additional or less maximum r.p.m.'s ? I read somewhere that you should go up or down on pitch when going from one to the other for them to perform the same.
posted 02-26-2003 07:11 PM ET (US)
Typically, the aluminum prop has thicker blades and a bit more drag. That should bring your WOT rpm down a bit, but I couldn't guess how much.
Red sky at night. . .
posted 02-27-2003 02:20 AM ET (US)
Why are you changing from stainless to aluminium? Is the stainless one damaged? Most people do the opposite and change from aluminum to stainless.
posted 02-27-2003 07:42 AM ET (US)
It's just an extra prop that I can buy for $15. Hard to pass up a bargain, since it looks new.
posted 02-27-2003 08:06 AM ET (US)
Just buy it and try it! For a spare (get home prop) it really doesn't matter much...
posted 02-27-2003 03:02 PM ET (US)
Jiles & Perry -
It would make a good backup prop, and after observing the internal damage caused in all probability by stainless prop hitting a rock reef, I'd recommend that when running in an area that is mostly rock opposed to sand/clay/mud, use the aluminum.
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