Hi all! Last week on a fishing trip, i noticed something strange with my boat. I have a 14.5 ft northwood 1467 with a 1999 merc 25 hp 2 stroke. with 3 people in the boat and all our gear, the boat takes off good cold, planes out as it should and buzzes across the lake, for a half mile or so and then it starts to slow down. if i bring it back to idle, then take off again, it will not plane at all. feels like someone knocked off 10 hp. Trying a little on lake diagnostics, i checked the fuel tank vent, ok. fuel filter, ok. compression good. Heres the kicker, if i take the engine cover off when its acting up, problem solved
it goes as it should again. I have tried to check for any internal exhaust leaks inside the engine to no avail. it even seems to have more power than ever with the cover off. This problem isnt so apparent with less weight in the boat. I can't seem to find any fresh air holes for the carb, should there be any? i'm kinda stumped
it goes as it should again. I have tried to check for any internal exhaust leaks inside the engine to no avail. it even seems to have more power than ever with the cover off. This problem isnt so apparent with less weight in the boat. I can't seem to find any fresh air holes for the carb, should there be any? i'm kinda stumped