Running rough

joe65

Recruit
Joined
Nov 5, 2019
Messages
3
I have a 2010 Mercury 40 hp 4 stroke 3 cyl. The engine runs smooth in neutral and in reverse.
When I shift into foward the engine runs rough and shakes. The engine will run good after it reaches about 1100 RPM. I have replaced the plugs and fuel filter and had the injectors cleaned.
 

QBhoy

Fleet Admiral
Joined
Mar 10, 2016
Messages
8,348
I have a 2010 Mercury 40 hp 4 stroke 3 cyl. The engine runs smooth in neutral and in reverse.
When I shift into foward the engine runs rough and shakes. The engine will run good after it reaches about 1100 RPM. I have replaced the plugs and fuel filter and had the injectors cleaned.
Hi. Is the prop on right ? In good condition ?
 

joe65

Recruit
Joined
Nov 5, 2019
Messages
3
I have a new prop on it. I had the same problem with the old prop.
 
Top