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Formula 271 Sr1 Prop

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Old 12-23-2019, 09:45 AM
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Default Formula 271 Sr1 Prop

Hi all

New to the site and looking for some info on correct prop for a 271 Im purchasing. It’s running a 21p 4 blade revolution. I have read some other threads on this but just want to open a new convo on this - any help and advice is appreciated!

Thanks,
Spence
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Old 12-23-2019, 09:59 AM
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Congrats on your new to you Bird.
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Old 12-23-2019, 10:43 AM
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What engine and rpm are you running at wot?
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Old 12-23-2019, 11:40 AM
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Boat has the 502 in it - I’m yet to drive the boat myself as we worked out a deal in November (pending water test) and it’s winter here in Ontario. The previous owner says it runs about 58mph wot depending on the load - but I’m not exactly sure on rpm - he also says it’s running 40mph around 4100 rpm.
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Old 12-23-2019, 09:03 PM
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If it's a normal 502 mpi (~415hp) that actually sounds good for cruise. Without knowing what rpm its topping out at, unfortunately we cant provide much feedback.
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