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Building it....
https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=4&t=71505
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Author:  FNG [ Fri Nov 03, 2017 7:50 am ]
Post subject:  Building it....

I searched like a demon for the specific answers so please y'all; don't blast me...
I'm building a short shaft mud motor, 18hp, belt drive, on probably a 12' flat bottom. I know that with long tails, transom height and shaft length relationship is very important, but on the short shaft I can make my belt housing whatever height I need so I'm not sweating that part. I'm needing two specific pieces of info:
1) is there a standard /better length for the prop shaft on a short tail setup and
2) when the engine is fully at rest and trim is bottomed out, what should the downward angle of the shaft be?

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