Setting carbs on a 1968 Evinrude 55873 R

[Country tunes]

Ok I took apart my carbs and cleaned them to remove all gunk so it runs cleaner it's a little better but having problems setting carbs as in this was my first time doing this the motor starts but has this weird tweak to it like the carbs aren't synced with each other so can someone please point me in the right direction it has 3 carbs on it an I don't know which one to start with neither how far to turn it ..

 

[Joe Reeves]

First, make sure that the linkages between the throttle butterflies are adjusted so that the throttle butterflies open and close at the same time. You do not want a butterfly closed and one ever so slightly open... they must be uniform. Have the throttle roller backed away from the metal cam during this adjustment so that there is no pressure on the butterflies.

(Carburetor Adjustment - Single S/S Adjustable Needle Valve)
(J. Reeves)

Initial setting is: Slow speed = seat gently, then open 1-1/2 turns.

Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running.

Eventually you'll hit the point where the engine wants to die out or it will spit back (sounds like a mild backfire). At that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

Note 1: As a final double check setting of the slow speed valve(s), if the engine has more than one carburetor, do not attempt to gradually adjust all of the valves/carburetors at the same time. Do one at a time until you hit the above response (die out or spit back), then go on to the next valve/carburetor. It may be necessary to back out "all" of the slow speed adjustable needle valves 1/8 turn before doing this final adjustment due to the fact that one of the valves might be initially set ever so slightly lean.

Note 2: If the engine should be a three (3) cylinder engine with three (3) carburetors, start the adjustment sequence with the center carburetor.

When you have finished the above adjustment, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.
********************
The butterflies "ALL" should just start to open when the scribe mark of the metal cam is dead center with the throttle roller, not before or after!