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How far should the center of the prop shaft be below the bottom on a single engine?

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How far should the center of the prop shaft be below the bottom on a single engine?

Old 04-24-2012, 09:59 AM
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Default How far should the center of the prop shaft be below the bottom on a single engine?

I feel as if my boat needs a -2 or -3" lower unit. I am currently running a std length imco lower, with a 5 blade P5X. What is the best way to tell if the shortie is the way to go?
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Old 04-25-2012, 01:34 AM
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Really depends on the bow lifting characteristics of the boat. on my boat, a single step, pad bottom I am at 3.25" below the hull, and would like to try another inch up. Some other boats need the bow lift that a deeper prop provides.

What makes you think you need to go shorter? how deep is your prop shaft currently?
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Old 04-25-2012, 12:09 PM
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3-5" below the bottom is the norm.
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