Is it normal on stepp hulls (Formula in particular) for the depth gauge to no read correctly when on plane? I assume this is due to the aeration induced by the step.....funny I should have realized that before I bought it......kind of dangerous to run where you have never gone before (on inland lakes) with no dependable depth gauge!!

Is there a fix? External transducer? true thru hull?

I have a new step bottom boat and my depth gauge only works at slow speeds.....I assumed it was normal?? I have a thru hull transducer

formulafastech....the transducer is glued to the inside hull starboard side of center rib about 2/3 the way back in the engine bay......there is a hole bored in the innerliner so as to make outer hull contact......glad yours works!!!

Steamin' rice- all Formula's have thru hulls, even my 97 312.......but I was questioning if the OLD stlye brass thru hulls or an external transducer would fix this problem??

AAAhhhh I see what you are talking about. If you find out a way to get your depth gauge to work at all speed let me know..

My transducer is located under the cabin step. It too has a hole bored in the inner liner so as to make outer hull contact. It seems to be accurate.

On a stepped hull the transducer has to be mounted in front of the step. For two step hull I would still think that it would have to be in front of the first step but that is a long way forward.

I am with Tinkerboat. I think that they have to be in front of the step.

Jon

Great, I see the logic for that. Unfortunately there is no posible way to get there!! That would be below the gas tank, and I'm not going to go thru that!! Any other solution?

You are going to have to get a transom/exterior mount transducer. I bought the Humminbird DF, which is re-labelled and sold as Gaffrig. It came with the transom mount unit and bracket. It is not that ugly. I do not have a stepped-hull, so I have the transducer mounted under my bilge pump plate. I know a lot of stepped-hulls have this problem.

Mine is also under the cabin stair and works fine at all speeds.