In Reply to: Re: maintenance posted by doug on December 29, 2017 at 11:51:04:
Carb is the first place many people suspect to be a problem, when it should be the last. It has something to do with how easy it is to twiddle all those little screws. Once properly set, carb screws shouldn't move by themselves, and the only periodic adjustment is at tune-up time. If a carb adjustment doesn't go right back close to where it was, the carb is dirty. Rather than twiddling screws to some goofy adjustment to compensate, I swap a clean carb on there, and put the dirty one in my pile of stuff to be rebuilt. This saves all the time and frustration of dealing with a dirty carb.
Nine times out of ten, when any of my tractors develop a sudden no-start problem, it's going to be electrical or ignition-related. If electrical and ignition check out ok, the next thing to check is fuel level and fuel flow. Very few carb problems happen suddenly (unless the linkage fell apart or someone started twiddling screws and instantly added "carb adjustment" to the list of problems).