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Old 17-03-2007, 06:35   #1
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Oh no! find/size prop?

Just a simple answer, I've researched, read David Gerr and I know less than I knew before. Are all propellors custom or modified?

Hull speed, around six knots.

Working boat displacement 5000# fin keel/spade rudder, propulsion 1GM10, KM2P transmission 3400rpm max continuous, around 2800rpm cruising, transmission reduction 2.21- output at prop max 1540 rpm. I'm looking for a fixed two blade 12" diameter bronze prop for a 3/4" shaft. I don't race and the propellor isn't shielded by the keel.
If I've got all that info can someone give me the second two numbers (blade area and pitch)? And where to buy one for a reasonable price.

disregard the first declarative......

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Old 17-03-2007, 06:42   #2
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I'd look for 12x10

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Old 17-03-2007, 12:52   #3
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Old 17-03-2007, 12:57   #4
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Aloha Heron,
There are some tables on another thread that you might be able to use. "Proper Prop size" is a good thing to do a search on this forum.
I think Never Monday is right but you might do a little more searching to confirm it.
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Old 17-03-2007, 15:26   #5
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This one has a good reputation.
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