Ive got a 79 merc 500 50hp that max speed is 6 mph. It used to run awesome 30+mph. Then last year i was out on the lake all day fishing and the motor just basically died on the way to the boat ramp. As i managed to get it there. Cleaned the carbs, new gas, new plugs, new fuel filter, bulb is staying primed. ran good for about 5 min on the lake the next time then did it again. THen i had a mechanic rebuild the carbs. ran good in the tank. runs great as long as its not under a load. wont go over 6 mph. took it back to the mechanic, they wanna charge me again to fix it so i decided to try here first see if anyone can help.
Thanks
Luke
Thanks
Luke