Posts: 3504
Location: Elk River, Minnesota | Hiya,
Yep...carb. Sounds like a slow speed needle needs to be adjusted a little.
In most cases with a carbed motor, there will be a horizontal needle just above the carb bowl that is notched for a screwdriver. This adjusts the fuel/air mixture for smooth running, idle, etc.
To adjust, get the motor warm first. Get it down to your low idle, then adjust the carb 1/4 turn inward...in a couple of seconds you should hear a change in how the motor sounds. Might get worse, might get better. Idle might go up a little, and if it does, you are probably on the right track. If it gets worse, turn it out 1/2 turn as that will take you 1/4 turn past where you started.
Keep adjusting little by little until you get the motor running smoothly. This should hopefully take care of the problem.
Steve |
