Mercury 150hp high speed misfire

[Larry2186]

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]

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?

 

[jlh3rd]

I'd start with filters first as stated. Mercs have the in-line main filter. There is a fuel rail filter also on some/ most bigger Mercs. , like my 2021 115 CT. But it is cumbersome to get to and not prone to clogging. Do you have a fuel/water separator?
That in-line filter doesn't hurt to be changed every year.