Mercury 150hp high speed misfire

Larry2186

Recruit
Joined
May 11, 2026
Messages
1
I have a 2018 Mercury 150 hp , it will run strong up to about 3000 rpm and then it starts cutting out. If I back off a little and then try to speed back up and do it slow I can get it up to 4000rpm before it starts missing. I first thought it was the fuel but It 's not the fuel as I hooked up a five gallon can with fresh gas and had the same problem .
Does anyone have any thoughts what to check. Engine has less than 300 hours on it.
 

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
14,241
Welcome to iboats
Perhaps the Problem, which sounds like Fuel, could be something other than the Tank.
How long have you owned this motor?
Dirt/Gum/Varnish/Water in the System could be the Problem.
Plugged Filter?
 
Top