ibskot 37 #1 Posted December 15, 2013 It starts but after 10ish seconds if stops. I don't see leaks, fuel filter has gas and tank is full. Air cleaner looks ok.Thoughts? I had been riding my son around for maybe 30 mins. Help Share this post Link to post Share on other sites
953 nut 52,143 #2 Posted December 16, 2013 It could be the vent in the gas cap, had that ptoblem on my 312-8, took the cap off, started it up and ran fine until about 5 min after putting the cap back on; got a new cap and no more problem. Share this post Link to post Share on other sites
leeave96 487 #3 Posted December 16, 2013 It could be the vent in the gas cap, had that ptoblem on my 312-8, took the cap off, started it up and ran fine until about 5 min after putting the cap back on; got a new cap and no more problem. +1 Good place to start. My Dad had this problem with a new riding mower. I had a similar experience this summer with a 12 hp Kohler similar to yours. Would run for 1 or more hours and then shorter and shorter intervals until it wouldn't run at all. Turned out to be the condenser. It was a cheap fix. Check the gas cap, then the spark. Share this post Link to post Share on other sites
Fordiesel69 232 #4 Posted December 16, 2013 Instead of changing parts, find out what you are loosing. Gas or spark. In 10 sec i doubt the fuel cap. More along the lines of a bad condensor, plug, coil, etc. Share this post Link to post Share on other sites
WH nut 553 #5 Posted December 16, 2013 (edited) Id pull the fuel bowl off the carb for a look see and a cleaning Edited December 17, 2013 by WH nut Share this post Link to post Share on other sites
daveoman1966 3,632 #6 Posted December 16, 2013 replace the condensor. Share this post Link to post Share on other sites
ibskot 37 #7 Posted December 16, 2013 I am going to check this out Thursday. Is the condenser the same as the coil? I am planning on working on that 416 too. The 312 is priority. Thanks Share this post Link to post Share on other sites
ibskot 37 #8 Posted December 16, 2013 Would a bad condenser make it start and run for a couple minutes (1-3 minutes) then shut off? Share this post Link to post Share on other sites
leeave96 487 #9 Posted December 16, 2013 I am going to check this out Thursday. Is the condenser the same as the coil? I am planning on working on that 416 too. The 312 is priority. Thanks The coil and condenser are different parts. Would a bad condenser make it start and run for a couple minutes (1-3 minutes) then shut off? Yes Share this post Link to post Share on other sites
WH nut 553 #10 Posted December 17, 2013 A condenser could, are you losing spark or fuel? Share this post Link to post Share on other sites
