I have a JD LX277 lawn tractor. When getting it ready for mowing after along winter, I did all that I usually do: fresh gas, check/replace oil/ clean deck/etc.....
When I fired it up for the first time (and subsequent), I pushed the choke up to start and once started, let it spring back to original position. The engine continued to run fast and then even faster. Throttle was kept on low as when started. The only way I could slow it down was to push choke to up position again and hold it there. Throttle doesn't seem to do much since it was already running fast.
I removed engine cover to check movement of things and all seems normal.
Make sure the throttle shaft in the carb is moving freely. They have a tendency to get sticky from fuel when setting. And because the governor spring will move the throttle plate to high speed when not running, it will stick in that position.
Make sure the throttle shaft in the carb is moving freely. They have a tendency to get sticky from fuel when setting. And because the governor spring will move the throttle plate to high speed when not running, it will stick in that position.
If the throttle moves freely then we are down to three possible issues. there is an air leak between the carb and the cylinder. the throttle butterfly has come loose and cannot control the throttle. The governor gear has broken.
If the throttle moves freely then we are down to three possible issues. there is an air leak between the carb and the cylinder. the throttle butterfly has come loose and cannot control the throttle. The governor gear has broken.
Once the weather warms up I will check this out. We're getting about 25 - 35 degree weather with freeze warning the next couple of days and snow flurries for the next several days not to mention the rain. I thought winter was over!
Grass is getting longer though so I have to get this done once it warms up.
If the throttle moves freely then we are down to three possible issues. there is an air leak between the carb and the cylinder. the throttle butterfly has come loose and cannot control the throttle. The governor gear has broken.
Great news for me! I fixed it!! Halleluia........ Once I looked closer and took the hood off, I realized I could access carburator through the air filter. Once I got the filter and housing off, I cleaned everything and put back together. I fired the mower up and it works perfectly.
