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Volvo Penta prop selection

Old 09-19-2017, 08:07 AM
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Location: Colorado
My Boats: '99 Cobalt 252, '95 FW H240
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Default Volvo Penta prop selection

Recently built a 500hp 509. The original motor was a 300hp volvo penta vortec 7.4l. The original F6 props are too small. With an extra 200hp should I get the F7 props or possibly the F8 props?
Currently @ 5200rpms with the F6's w/ 1.95 gearing. GPS is 55.4 @ 4300' elevation but the jetting isn't dialed in yet.
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Old 09-27-2017, 12:33 PM
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It all depends on the rpm you desire at WOT. And that depends on a dyno sheet.
5200 sounds fine for the 509 at 500HP.

Brett Anderson / BBLADES Professional Propellers
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