stalling stops

Posted by Glen Weilbaker on July 06, 1998 at 11:41:58

In Reply to: Radiator water level
posted by Jim Miller on July 06, 1998 at 09:49:52

Joe,
By the carb's design it has a tendency to be lean while stopping due to the gas sloshing forward away from the idle circuit in the bowl. This has to compensated for via the idle adjustment. In order to achieve proper adjustment the throttle shaft and or housing bearing must not have excessive wear. If it does extra air will be pulled around the wear and can not be compensated for with the adjustment. New over size shafts are avialble, if really bad rebushing the housing may have to be in order. If the shaft is good here's a quick procedure;
Warm the engine.
adjust gas mixture 1/4 turn open.
set the spark about 1/3 to 1/2 down.
set the throttle up all the way or to keep engine running.
adjust the idle speed screw, the one that controls the throttle shaft for a good idle RPM.
THEN ADJUST THE IDLE AIR MIXTURE SCREW for smooth running engine, IN IS RICH, OUT IS LEAN. If the motor speeds or slows from the desired idle RPM re-adjust idle speed screw then follow up with the AIR ADJUSTMENT AGAIN.
Always end the adjustment with the air mixture last.
This will get the idle right in, but wait, she's still going to want die on stopping, tweak the air mixture screw a tad rich. You may have to do a few stops to dial in.
Now all this is if the engine is in good tune.
Have fun tinkering,
GW

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