Hey Guys,

After having a longtail for a couple years I got tired of going 18mph and sold my rig. The mud motor 25 hp limit in WMA's helped speed up the decision to sell my 27 . Now I have decided to go with a outboard tunnel hull rig so i can go faster and still get through pretty shallow stuff.

I decided to go with tiller steer to keep the boat open, and know I want to go with a 90-115hp engine, currently leaning toward an ETEC 90 because its the lightest of the bunch. I also know I want to go with a custom built heavy/mud hull. The problem I am running into is there is NOT a lot of information on tunnel hulls and it seems everyone does theirs a little different.

Does anyone know how to figure the dimensions on a tunnel so to avoid cavitation and blow out problems? There is also a lot of difference of opinion on venting the tunnel...

I got the itch to have this boat built asap, i just want to make sure i get it done right!

Call prodigy. They have built some nice tunnels

Save your time and money on the tunnel. They are slow and very hard to set up. Build you a long flat bottom boat with a hydraulic Jackplate. Take it from someone who has been there and Thank me later.