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Posts: 46
| You need to determine what your peak RPM range is. Consider trying a BRP Viper prop at the pitch that gets you to the very top of that range with a light load. The Viper performs well on my 681 (had a 15p viper on a 115 fast strike and now a 17p viper on a 135 etec HO and tried many others on both engines) but every boat is different. Mark's Performance Props has a three blade razor that is also outstanding, if not a hair better than the Viper. The Tempest runs a bit faster top end but doesn't hold the bow of the 681 up well enough to prevent porpoising at anything less than WOT. Four blades, including the trophy, lagged the overall performance viper and 3 blade razor for me. But again, every boat is different. | |
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