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Old 07-13-2010, 07:38 AM   #8
Van
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Join Date: Apr 2002
Location: Quincy
Posts: 4,145
If a 20 footer needs trimtabs, there is something strange going on.
Gradys are a heavy boat but still should not need trim tabs.
Tabs can bring your bow up or down.

My hydfrofoil on my 21 proline with a 175 works great and can change the pitch while underway. But I'm pushing with an outboard.

You say your'e doing 40 mph but not at plane?
You may have a prop issue. Its a easy and cheaper fix.
Maybe look into that first.

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