hi all im having trouble with my motor i think. i have a 1990 90hp force motor on my ski boat and it will not go any faster than 18mph with my two dogs and 4 people in boat ranging from 160-200 lbs. long story short i bought the motor not running 2 years ago, let it sit for 1.5 years. got it running this summer, i replaced the stator, trigger, and starter. i put it on my 17' fishing boat and it wouldn't go any faster than 12 mph found out it had a 21 pitch prop on it i dropped down to a 17 then a 15, getting a max speed of 18 mph no load but myself and 2 seats. so i did a carb rebuild, timed the motor, and synchronized the carbs, and fuel pump. still no gain so i bought a new boat a little 16' beach craft older ski boat put it on there and now i had a max speed of 28 mph with just me in it and with two dogs and 4 people in boat ranging from 160-200 lbs. can only get 18mph out of it i switched to a 17 pitch prop can get 36-38mph out of it with just me and is a dog out of the hole and cant carry any wait at all. when i put the motor on my first boat i cleaned all the carbs and replaced all the fuel lines and checked all the compression compression was 130-135 on all cylinders just recently i lost a coil and replaced that, the motor starts everytime usually first turn of the key and runs perfect my question is it seems like for such a small boat i have it on now it seems like it should be much faster and have allot more power than it does. does this sound right or am i just expecting to much out of this motor?
