"i have a 4.3 mercruser alpha
"i have a 4.3 mercruser alpha one,runs perfect for the first 30,40 mins up at 5000rpm then it will drop in power and only sit at about 1500rpm to 2000rpm ?it will backfire if i try and give it some.if i turn it off and let it sit for 20,30 mins its ok and its the same all over again.no overheating,my guess is something to do with fuel ?any ideas please"
"i have a 4.3 mercruser alpha one,runs perfect for the first 30,40 mins up at 5000rpm then it will drop in power and only sit at about 1500rpm to 2000rpm ?it will backfire if i try and give it some.if i turn it off and let it sit for 20,30 mins its ok and its the same all over again.no overheating,my guess is something to do with fuel ?any ideas please"