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Can you please tell me the appropriate propeller size to run…

Hi Jason. Can you please...
Hi Jason. Can you please tell me the appropriate propeller size to run my boat at 6200 ft above sea level. Engine serial number D821957 mercruiser alpha one
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Answered in 34 minutes by:
6/29/2018
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 18,240
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
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Hello. Jason here again. Is this the Captiva cuddy cabin or the Captiva bow rider, they made both in 1992.

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Customer reply replied 1 month ago
Bow rider 1993

Got it. At 6200 feet the calculator software says to start with a 15X15 prop. If there was anything else feel free to ask. If not, please do not forget to select a 5 star rating for my help. Thanks again! -Jason

Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 18,240
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
Verified
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Customer reply replied 1 month ago
Hi Jason. Just following up on your answer. I’ll start with the 15x15 prop as you auggeast. Am I correct to assume if I don’t get the performance then go to a 15 x 14 prop?

So the way the pitch works is for every inch of pitch you go up, engine RPMS will come down by 200. For every inch of pitch you go down, engine RPMS come up by the 200. So you would start with the 15X15 and go run the boat to top speed, and see what the top speed RPMS are. Your engines RPMS should be 4200 to 4600 at full throttle. As long as your engine RPMS are within that window then you are okay.

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Customer reply replied 1 month ago
Got it thank you
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