GoodChance
Well-known member
- Joined
- Sep 20, 2010
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I know that there aren't many out there but I have a question for fellow 2801 owners, especially those running F225's or 250's.
What prop are you running?
Right now I have a pair of F225's. These are the 3.3L engines. Motors are set on an Armstrong bracket and motors are at the highest hole possible. I can see the anti-cavitation plate at cruise. Gear ratio of these motors are 2.0:1.
As you know, the boat has a 9.5ft beam, 21 degree deadrise and per Parker, the "real-world" weight is with 300 gallons of fuel is 7,650. I figure that I'm probably around 8,000 - 8,500 as tested with people and gear. Right now I'm running the Yamaha M-19 SWS prop. This in not the SWS II prop but the 2 are very similiar. Here are my current performance numbers:
At 3800 rpm = 29mph which translates to 14.5% slip
At 4,000 rpm = 31 mph translating to 14% slip
WOT - (with a 15 mph tail wind and with a 1.5kt current) 5900 rpm = 48.9 mph
WOT (against 15 mph wind and against 1.5kt current) 5500 rpm = 42.4 mph
Average of the above WOT - 5700 rpm and 45.7 mph = 11% slip
These numbers aren't too bad but I'm wondering if there is room for improvement? I'm thinking of moving to a 4 blade prop such as a Mercury Rev4 or the PowerTech OFS4 in a 17" pitch.
Plus, a point I should probably highlight (and this is probably most important) the bow likes to ride high and I'm constantly on the trim tabs to keep the bow down. Even in calm water, I must use ½ tab to keep the bow down. Several different owners of the 2801 have said the same thing to me. The boat just likes to ride "bow-proud". If it gets especially rough, I need to use a lot of tab and trim the motors down. I'm thinking that the 4-blade prop will do a better job of lifting the stern. Thoughts?
What prop are you running?
Right now I have a pair of F225's. These are the 3.3L engines. Motors are set on an Armstrong bracket and motors are at the highest hole possible. I can see the anti-cavitation plate at cruise. Gear ratio of these motors are 2.0:1.
As you know, the boat has a 9.5ft beam, 21 degree deadrise and per Parker, the "real-world" weight is with 300 gallons of fuel is 7,650. I figure that I'm probably around 8,000 - 8,500 as tested with people and gear. Right now I'm running the Yamaha M-19 SWS prop. This in not the SWS II prop but the 2 are very similiar. Here are my current performance numbers:
At 3800 rpm = 29mph which translates to 14.5% slip
At 4,000 rpm = 31 mph translating to 14% slip
WOT - (with a 15 mph tail wind and with a 1.5kt current) 5900 rpm = 48.9 mph
WOT (against 15 mph wind and against 1.5kt current) 5500 rpm = 42.4 mph
Average of the above WOT - 5700 rpm and 45.7 mph = 11% slip
These numbers aren't too bad but I'm wondering if there is room for improvement? I'm thinking of moving to a 4 blade prop such as a Mercury Rev4 or the PowerTech OFS4 in a 17" pitch.
Plus, a point I should probably highlight (and this is probably most important) the bow likes to ride high and I'm constantly on the trim tabs to keep the bow down. Even in calm water, I must use ½ tab to keep the bow down. Several different owners of the 2801 have said the same thing to me. The boat just likes to ride "bow-proud". If it gets especially rough, I need to use a lot of tab and trim the motors down. I'm thinking that the 4-blade prop will do a better job of lifting the stern. Thoughts?