40hp Mercury- 1998. This motor has the 60hp carburetors on it and the air intake baffles were off. Ran like a scalded cat. However, it was loud and idle was fast.
This week, I put the air intake baffle/plenum back on. Idle is great, but the motor will not rev up like before and almost 4-strokes. Running Rich. I have not pulled the plugs yet to confirm, but pretty sure the high speed jets need to be changed out.
From what I can find, the High Speed Jet is on the lower Port side of the carb, near the bottom of the bowl. When I pull the brass "screw" it is a hollow bolt with two holes in it. Is the size of these holes the Jet??
There is no number on this to indicate what size the jet is.
This week, I put the air intake baffle/plenum back on. Idle is great, but the motor will not rev up like before and almost 4-strokes. Running Rich. I have not pulled the plugs yet to confirm, but pretty sure the high speed jets need to be changed out.
From what I can find, the High Speed Jet is on the lower Port side of the carb, near the bottom of the bowl. When I pull the brass "screw" it is a hollow bolt with two holes in it. Is the size of these holes the Jet??
There is no number on this to indicate what size the jet is.