Re: Need ideas to stop porpoising?
You want to be able to hit the upper end of maximum recommended with the boat at max gross weight. Load it up with full fuel, max people, and max equipment, and you should be able to hit the upper end of max rpm range.
You should be able to hit max of max at max.
I can hit 5800 rpms with full fuel and 7 people on the boat, along with beach and camping gear in the cabin. I expect to never spin a hub from overloading, or have a shortage of low-mid-range power/torque in an emergency.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury
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