77 Evinrude 85hp stalls going into gear- adjustment screws?

[Jester2913]

Hi all, thanks in advance for any help. I dont really know what I am doing, so trying to learn. I have a pontoon with 1977 Evinrude 85hp 2 stroke outboard (Model 85793S) that starts up just fine and stays running in neutral. However putting it in gear (forward or reverse) stalls the thing out 50% of the time. It stalls less when its warm and has been cruising for a while but still enough that at the wrong time in a small channel will cause panic. It does not stall when accelerating or once in gear.
I have done basics checked fuel filter, fuel, spark plugs. Research is pointing that its idling to low and something needs adjusted. My RPM gauge doesnt work so I cant tell RPMs.

A guy said to adjust these screws,circled in blue, (mixture screws?) will slight adjustment to that help? Or is there something else I am missing? Thanks again

 

[racerone]

???----Circled in blue are NOT ADJUSTING SCREWS at all.-----Do a compression test and post the actual values here.

 

[Berdink]

I'm just starting out myself.
Those are the shafts attached to the butterflies.
.
I wouldn't adjust anything you don't know what it is.
.
But, before you adjust anything, go around your motor and take a picture of everything. That way if you do adjust something wrong, you can get back to where you were.

 

[racerone]

You are missing the FACT that there are no fuel mixture adjusting screws on these carburetors.