Logo
FULL SITE MENU

Johnson 6hp carb adjustment

V

Vincent Verrillo

Guest
" I have a 1968 Johnson that I

" I have a 1968 Johnson that I need to adjust the carb it has a lean rich nob that can be adjusted outside the case. How many turns out should it be for a safe start up ?????
I want to thank everyone for helping me with the waterpump replacement. It went very well...
Thanks, Vin "
 
"(Carburetor Adjustment -

"(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.

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.

Joe
"
 
Back
Top