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86 formula 272 prop help ?

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Old 10-23-2007, 01:25 PM
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86 formula 272 prop help ?

Is there any 272 owners that can help not sure what prop i should buy . my boat has twin merc 350's 260 hp stock with alapha drives it runs toped out 49 mph at 3900 is this right or what should i do they are also not ss props thanks.
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Old 10-23-2007, 08:13 PM
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My 85 272 would run 60 at 4800 RPM with cleavers. You have too much prop or your motors are tired. Also Formula had a performance option that had a higher than normal X height. The early 83-84 models had a fairly big rocker in the hull. Check on the Formula forum.
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Old 10-24-2007, 04:08 PM
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My 85 272 would run 60 at 4800 RPM with cleavers. You have too much prop or your motors are tired. Also Formula had a performance option that had a higher than normal X height. The early 83-84 models had a fairly big rocker in the hull. Check on the Formula forum.
do you remember what size dia the props were and what pitch? thanks
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Old 10-24-2007, 04:26 PM
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Like F311 said.
Run cleavers. I have them on my 85 Formula 272 LS. 60 MPH.
23" pitch.
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Old 10-24-2007, 08:53 PM
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Like F311 said.
Run cleavers. I have them on my 85 Formula 272 LS. 60 MPH.
23" pitch.
I would also try A pair of 21 Mirages Or 23 Mirage. My 87 272 would spin the 21's 5000 but i lost 4 mph I ran the 23's Spun them 4500 @59.99999 my cruse was 40 at 3200.
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Old 10-24-2007, 08:56 PM
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My cleavers were 21 pitch. The bravos need to be 3 blade.
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Old 10-25-2007, 08:18 PM
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is there only on dia for these alpha drives or what dia should i use with 23 pich clevers

Last edited by tom call; 10-25-2007 at 08:19 PM. Reason: mistake
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Old 10-25-2007, 08:45 PM
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23 is too much pitch. You need 21 pitch. Contact Julie at Throttle Up. They advertize on here.
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