Posts: 3514
Location: Elk River, Minnesota | Hiya,
There is no doubt in my mind Alumacraft was very conservative when they put their hp ratings on the navigator 165....especially in the tiller model.
One issue I had with mine back when I first purchased it was that same porpoising issue. I had a 90hp yamaha on it (smallest 2 stroke 90hp made) and it was porpoising really bad. Took it back to St. Peter where I took it for a spin with one of the builders. The first thing he did was feel the edge between the back of the transom and the bottom of the hull. Found that the seam was hammered up a little much behind the rivet line, causing my hull to porpoise. You wouldn't think a little 1/2" wide section of a hull would cause so much issue...but it can.
What he did to my boat is he first asked me if I wanted to watch or not (some people don't like watching their boat take a little work that might not be so "professional looking". After I said I wanted to see what they do in case I need to do a little more or not, he took a 4" wide mason's chisel and a hammer and with a few hits along the back edge behind the rivet line, he wedged the seam open a little more, which settled the bow down tremendously. Problem solved. All I did after they wedged it is filled the seam with silver silicone which matched the boat perfectly...couldn't even tell they did anything.
Pretty cool thing if you ask me...to be able to tweak the hull to match the need without damaging it. Saved me from getting one of those hydrofoils on that motor.
Steve
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