drivebywire
Forum Newbie
- Joined
- Jul 6, 2014
- Threads
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- Messages
- 5
Hi,
I've got a Wheel Horse with a Kohler Command 12.5S that has been running well until recently. All of a sudden with no warning it would start to run rough and backfire through the carb and/or muffler. For a while I would wait for 10-15 minutes and it would start back up. Now it rarely starts. I've done the following:
1. Replaced the plug
2. Checked the fuel path from the bottom of the tank to the carb. doesn't appear to be blocked. Fuel comes out from the line at the carb.
3. Checked the spark with the plug in the hole. The spark isn't blueish white like I';m used to but it's always there.
4. Pulled the carb, cleaned it, and used compressed air on the various areas of the carb.
5. Checked the air gap between the coil and the flywheel.
6. Pulled the flywheel bolt. The key still seems to be in place.
I worked on it yesterday and today. I've noticed the both plugs are carboned on the tip from the small amount of running it does do. When I cleaned the carb I pulled the new plug and put the old one back in. Before I did that I cranked the engine to make sure there was no raw fuel in the cylinder. The air coming out of the plug hole was dry. I put the plug back in and with the blower cover off it started right up. I let it run for 30 seconds and shut it off, restarted it 5 more times and it ran perfectly.
I put the blower cover and air cleaner back on and tried to start it again. All I got was the same backfiring through the carb.
I would appreciate your help in trying to diagnose the problem.
Thanks in advance.
I've got a Wheel Horse with a Kohler Command 12.5S that has been running well until recently. All of a sudden with no warning it would start to run rough and backfire through the carb and/or muffler. For a while I would wait for 10-15 minutes and it would start back up. Now it rarely starts. I've done the following:
1. Replaced the plug
2. Checked the fuel path from the bottom of the tank to the carb. doesn't appear to be blocked. Fuel comes out from the line at the carb.
3. Checked the spark with the plug in the hole. The spark isn't blueish white like I';m used to but it's always there.
4. Pulled the carb, cleaned it, and used compressed air on the various areas of the carb.
5. Checked the air gap between the coil and the flywheel.
6. Pulled the flywheel bolt. The key still seems to be in place.
I worked on it yesterday and today. I've noticed the both plugs are carboned on the tip from the small amount of running it does do. When I cleaned the carb I pulled the new plug and put the old one back in. Before I did that I cranked the engine to make sure there was no raw fuel in the cylinder. The air coming out of the plug hole was dry. I put the plug back in and with the blower cover off it started right up. I let it run for 30 seconds and shut it off, restarted it 5 more times and it ran perfectly.
I put the blower cover and air cleaner back on and tried to start it again. All I got was the same backfiring through the carb.
I would appreciate your help in trying to diagnose the problem.
Thanks in advance.