Tunnel hull outboard height

[Rinochasr]

Hey, I’m in the process of mounting an outboard onto a tunnel hull and am unsure of the proper mounting height. Is there a generally accepted rule of thumb regarding outboard height or does it vary with each build?

-thanks, Mike

[HTVboats]

If you center the prop shaft with the line across the bottom of the sponsons you will be fine. From there go up and down 1/8th inch vertically with each prop and find the spot that works best.
Mic

[JestDanny]

I set mine so the adjustment is centerline prop shaft, 75% above sponson bottom an 25% below sponson bottom. My 3 tunnels all run with the centerline slightly above sponson bottom.

[Rinochasr]

Thank you gentlemen, very much appreciated!