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Roman1958

propeller size & pitch

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Does anyone know what diameter and pitch is best for a 1997 Chaparral  1935 SS. 19 ft. and has 5.7 liter Merc engine with Alpha one outdrive. Running at sea level altitude (Cape Cod). Just dropped in new motor but had no prop when I bought it.

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On 6/3/2018 at 8:12 PM, Roman1958 said:

Does anyone know what diameter and pitch is best for a 1997 Chaparral  1935 SS. 19 ft. and has 5.7 liter Merc engine with Alpha one outdrive. Running at sea level altitude (Cape Cod). Just dropped in new motor but had no prop when I bought it.

I am running a 14.5x17 aluminum on my 1995 2335 5.7 4 barrel  alpha one generation 2. I reach WOT 4400-4600 at about 42 miles a hour.  My boat is a little bigger and heavier. That 14.5  makes a big difference from a 15x17 on my boat.  Just a guess maybe a 14.5 x 19 for you? I would continue to look around and get some other input. I would think a boat that size with a 5.7 fuel injections should make 50+ mph with the correct prop. Maybe you can borrow a few to see what works best. Let us know what works

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