Posted by John M on August 22, 2016 at 15:45:46 from (67.231.165.179):
Since figuring out the electrical gremlins on my ZTR, I have a new one. Ill try to explain the best I can. 2 tanks, hold 5 gallons each. M=Mower got to where it would only run 10 minutes or so, and then just die. If I was fast enough to kill the deck, and move the choke to about 3/4, I could make it back to the building. Almost the exact same time, the engine on my other ZT started having very similar symptoms, and after investigation, I found water in my gas can. (Still not sure how that happened)I drained and cleaned out the tank on ZTR #2 and all is fine. On the first one, I drained the fuel, and sure enough, water in the fuel. I took both tanks off and have let them sit in the sun, and are dry. I replaced the fuel lines, since they were off, and getting old, as well as a new fuel filter. I removed the carb and cleaned what little gunk was in there, which wasn't anything more than a little drop of water or two. I also removed and checked the valves, which were fine. After getting it all back together, I put a couple of gallons in each tank. The engine started, and ran fine, so I let it sit for a few minutes, and it never missed a beat. So I get on, head to the yard, make 2 rounds and it starts dieing again. I managed to get it back to the building, and keep it running by choking and playing with the throttle, but I did notice that the filter had no fuel in it. Not just a little, NONE. If I choked it, fuel would pull into the filter and it would stay running. It finally got to where it would no longer stay running, but I sat there for a few seconds and watched the filter and the fuel slowly filled the filter back up. I can take the lines loose, and blow through the lines fine, plus with them being new, I don't think they are the problem. I can take the line loose at the pump and have feul coming out the line to the carb, and it does push fuel when I turn the engine over, but no real force behind it.
My next step was to check for spark. When the engine finally died, I pulled the wire on each cylinder and I have a good blue spark on each side. I cant even think its electrical, as choking helps for a moment, so I'm thinking the fuel pump isn't pulling the fuel FROM the tank to keep it running. Opinion?
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