MrGiggles
Well-known member
I repowered my 1448 Alumacraft F7 with an 83 Johnson 25hp.
I took it out for the first time today and it's plenty fast, but porpoises pretty badly above 25mph.
I had the trim pin in the middle hole and moved it one hole toward the transom to see if it would help but it did not.
It's fairly heavy in the front, there's a group 29 battery, bow mount TM, and a small casting deck. Over 100lbs. The gas tank, myself, and the motor are all that's in the stern. The bow stays down once I get on plane.
It's a short shaft motor and the cavitation plate is level with the ribs on the bottom of the hull, about 1" lower than the flat part of the hull.
I do not plan on traveling much faster than 25, but what is the best way to alleviate the bouncing?
I took it out for the first time today and it's plenty fast, but porpoises pretty badly above 25mph.
I had the trim pin in the middle hole and moved it one hole toward the transom to see if it would help but it did not.
It's fairly heavy in the front, there's a group 29 battery, bow mount TM, and a small casting deck. Over 100lbs. The gas tank, myself, and the motor are all that's in the stern. The bow stays down once I get on plane.
It's a short shaft motor and the cavitation plate is level with the ribs on the bottom of the hull, about 1" lower than the flat part of the hull.
I do not plan on traveling much faster than 25, but what is the best way to alleviate the bouncing?