mikegoode@charter.net 0 #1 Posted August 2, 2011 Hi I have a 1998 520 xi wheel horse motor over heating run about 40 min and the heat gauge peg out to red it will shut off like it vapor locks i wait about two hours let it cool down about the only way i can get it to crank is take the breather off and pour gas in carb it cranks and try to die I pour more gas it and it run about the thrid time pouring gas in carb it stay runing. any one have this promblem and know what it is that cause the motor to overheat up. Thanks Mike Share this post Link to post Share on other sites
smoreau 658 #2 Posted August 2, 2011 :woohoo: First check oil level, then if that's good remove the metal tins around the engine and make sure all the cooling fins are clean of grass clippings and dirt. Share this post Link to post Share on other sites
krazy_horse 59 #3 Posted August 5, 2011 Also if your carb is adjusted to lean, fuel air adjuster turned in to far will tend to over heat. I hope what smoreao suggested and this will help. Regards, Jim Share this post Link to post Share on other sites
boovuc 1,090 #4 Posted August 6, 2011 There was another thread here about the time you posted your over-heating issues. It sounds very likely that you are over-heating considering the gauge goes up and the motor dies. Yours has the Koler Command 20 which is a much better engine with less issues than the earlier Onans. The temp gauge is reading Oil Temp and not the metal surface of the engine. First and foremost, please do what the others before my post told you. First, remove the tins around that engine and check for debris. Even a mouse nest! Anything that could restrict air flow and cooling. As far a having a fuel mix that is too lean.........did you adjust the carb sometime before you started having issues? Is your fuel filter clean? Do you have good flow coming from the gas tank? You can always run the tractor with the choke out a little to enrich the mixture and see if it helps. If you see that gauge heading to red, shut it off immediately and start checking for a drag on the engine. Take the mower deck off. Check it for binding. Same with the mule drive. Check that the PTO is free moving when not engaged. Make sure the idler is free on the drive belt. Run the tractor with nothing hooked up to it or just run it at full RPM sitting still and look for over heating. Hope we can get this pin-pointed for you! BooVuc Mill Hall, PA Share this post Link to post Share on other sites
