Re: 1989 18' with an 1988 Merc 115?
That 115 inline 6 is a great motor. The boat should perform well with even 4 people on board. I run a 20' SeaCraft with a 90 hp Mercury. Cruise at 25-26, WOT at 33-34, and 5 mpg.
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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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