Took my Lund/Merc 40 4 cyl 2 cycle fishing the last two days. It cuts out
quite a bit, and I'm suspecting jetting. The gas is fresh. Plugs are new.

I need to buy a manual, but don't want to part with the $$$. I've done a
lot of carb adjustments on cars, motorcycles, atv's, etc.

This motor has two carbs. Are the low speed jets just brass screws that you
adjust at a high idle? Something was mentioned about high speed jets, and
do those need to be adjusted when the boat is going fast? Or is it a thing
of 1 1/2 turn from closed, or something like that?

The engine compartment is crowded on that motor, but I know I could pull the
cowling, and figure it out with a flashlight and some time.

Help would be appreciated, especially links to diagrams so I could pick out
the high and low, and other tips.

That is, when you're not busy talking politics. Politics is just too boring
and depressing, so I have decided that I want to go boating and fishing
instead, and at least if the end comes, I'll be standing in my boat for the
initial nuclear flash.

thanks.

Steve