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Armstrong Brackets


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There are very few 20' boats that can handle an Armstrong bracket, and the ones that can are designed for it from the start. The problem is weight distribution and center of gravity. For every foot you move the engine back you are in effect doubling the weight, due to a longer lever arm. Most brackets will set the engine back in the neighborhood of 3 feet which will cause a huge difference in boat trim. Larger boats offset this by moving consoles, tanks and batteries forward, but on a 20' factory boat you will be stuck with the present location of those heavy parts unless you do a total re-design and rebuild.

If you want to get the engine off the transom then I'd recommend a manual jackplate with a setback of less than 12". You'll have some serious issues if you go back any farther than that.

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There are very few 20' boats that can handle an Armstrong bracket, and the ones that can are designed for it from the start. The problem is weight distribution and center of gravity. For every foot you move the engine back you are in effect doubling the weight, due to a longer lever arm. Most brackets will set the engine back in the neighborhood of 3 feet which will cause a huge difference in boat trim. Larger boats offset this by moving consoles, tanks and batteries forward, but on a 20' factory boat you will be stuck with the present location of those heavy parts unless you do a total re-design and rebuild.

If you want to get the engine off the transom then I'd recommend a manual jackplate with a setback of less than 12". You'll have some serious issues if you go back any farther than that.

Thanks Cracker Larry, I am looking at other options

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