We have recently replaced the 40hp evinrude with a new 50hp Merc 2 stroke with power trim and tilt. Approaching full throttle the boat pulls left and rolls to the right. Adjusting the trim tab on the motor helped a bit but it still rolls. Is this what they call "chine walking"? Is the boat overpowered? Any suggestions?
Tom and Kit
1953 16' "chine walk" problem??
Moderators: a j r, TDockside, Miles, Moderators
The boat is a 1953 16' Thompson Sea Coaster. It did not behave this way with the last motor. This 50hp Merc is significantly heavier and more powerful than the Evinrude 40hp Lark. As I have adjusted the anode trim tab below the cavitation plate, the problem has significantly lessened. I just cannot quite get to wide open. The ride begins to get a little scary!a j r wrote:What kind of boat? Make, model, year?
Did it do this with the previous motor?
Could you have a hogged bottom?
Andreas
After inspection, I do not think the bottom is distorted (hogged). Would a whale tail help to stabalize the hook and roll? The handling of the boat seems to improve as I trim the bow upward. Is this typical of Thompson boats with a flat style bottom at the stern?
Tomandkit
There are thousands of Thomspon boats that perform just fine.
The 1953 brochure from Thompson Bros. Boat Mfg. Co. lists maximum HP rating for the Sea Coaster as 50 HP. That was in 1953 HP ratings, which are differnt than on modern motors.
I cannot tell you if trim tabs or whale tails will help.
Andreas
The 1953 brochure from Thompson Bros. Boat Mfg. Co. lists maximum HP rating for the Sea Coaster as 50 HP. That was in 1953 HP ratings, which are differnt than on modern motors.
I cannot tell you if trim tabs or whale tails will help.
Andreas
