I have a Cub 1050 that came with a Kohler Courage 23hp engine. It has about 390 hours on it.
When I mowed with it last week, after about 2 hours the engine started to surge. I throttled it down and it shut down and then would not start. I figured it might be a fuel problem so I sprayed some starting fluid in the air cleaner opening, but that did not help.
I checked for fuel and when I pulled the line from the carb, fuel poured out.
(Then, it sat for a week while I was on vacation)
The next thing I decided to check was the fuel shut off solenoid. I had 12 volts to the solenoid and when I turned the key I could hear it pick up. So, I tried to start it and it fired right up like nothing was wrong.
The next day I mowed, 2 hours into mowing, the engine started to surge again, I left it WOT this time. It continued to surge periodically (less when under load), then after about 5 minutes it shut down and would not start again. I turned the key and I could hear the solenoid pick up, but it seemed more faint.
Is this the solenoid? If so, is there any way to test it? Or, am I barking up the wrong tree? Any ideas on what would cause it to consistantly quit after 2 hours of running fine? HELP.
I am assuming it has to be a fuel issue. My thinking: If the timing was off, it would not run at all, if it was a spark issue, it would still run on one cylinder because it has two coil packs.
Edited by tweidman, August 05, 2014 - 09:28 AM.