What causes Porpoising
Ran my new to me 20 today for the first time. It is powered by a 150 ETEC. The engine only turns up 5000 rpm and seems to porpoise too much. I had to trim the motor down and run with the trim tabs down to get the boat to run smooth.
What causes this? Could the problem with the porpoising and the motor not turning up be due to the height of the motor?
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