I have just recently purchased a new 1652 lowe tunnel hull. When I try to trim up the motor the boat starts to porpoise. I have to keep the motor trimed all the way down. I put more weight in the front but it hasn’t helped any. If anyone knows a solution please let me know.
Thanks
Greg
My 15′ glass boat does exactly the same thing. The sort of strange thing was that with a higher pitch prop, I could trim it out more and get a little more speed (but the motor overheated – bad news)!
The basic principles at work are the prop thrust and the trim angle need to work together with the hull design to steady the boat in the water. In my case, lower pitch prop = less thrust = less possible trim angle.
Weight distribution will affect it some, but for me, the 100lbs or so that I’m shuffling around really is a small percentage of the total weight of the rig when it’s in the water.
I’ve considered adding a fin/hydrofoil, but have heard mixed reviews and don’t want to throw money at something that’s not going to help. I’ll be interested to see if anyone else has a fix for this.
Is you motor mounted in the lowest position. If not lower you motor. Tunnel boats are picky and need to be set up just right. If it is in the lowest hole you can play around with different props but your best bet is to buy a manual jackplate and adjust from there.
Good Luck,
Troy Patterson
You must be logged in to reply to this topic.
