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Old 10-12-2008, 12:52 PM
peterb peterb is offline
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Join Date: Dec 2004
Location: Montclair, Sandy Hook & Highbar Harbor, NJ
Posts: 1,148
Default Prop's performance & trim tabs - need help

Ok all, here is the lay of the land.

I have a 23' 1972 SeaCraft w/twin Yamaha 200 HP OX66's. The motors are on a full flotation bracket. Also, I have Bennet 12 x 12 trim tabs.

The boat is definately stern heavy.

I have two sets of Yamaha SWS series props (21 x 14.75 and 19 x 15.25)

The engines are mounted at the mid level on the bracket (I have had them at the top level and bottom level as well)

I have two problems.

First, the boat rides (particularly into a head sea) ass heavy. I used to have another 23 SeaCraft w/twin Yamaha 150's (no bracket) and it was a better riding boat into a head sea. That setp had 17" SWS props.

Second, the prop's definately kick up some water when the boat is on plane.

Using the 21" props I get better WOT speed (up to mid 50's) and slightly better fuel economy. The 19" props probably give me a slightly better ride in snotty condition (because they enable me to plane at a slightly slower speed).

Any ideas?

I have been thinking about the following

Purchase and install the drop fin verion of the Bennet trim tabs.

Looking for another set of props (4 blade) that raise the stern a little.

Any specific feedback would be greatly appreciated.

Thanks,

Peter
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