bo dawg 478 #1 Posted March 26, 2017 (edited) On my SK-486 after running it for a while, maybe approx 1 hr or so. It will shut off and engine will not turn over like it has no spark. By the time I look it over trying to trace it down, cooling enough, it starts back up. So would it be correct to assume its the coil doing this??? Edited March 26, 2017 by bo dawg Share this post Link to post Share on other sites
oldredrider 2,547 #2 Posted March 26, 2017 Sounds more like a poor connection somewhere. A dysfunctional coil usually doesn't wait an hour or so before giving up. 1 Share this post Link to post Share on other sites
cafoose 3,159 #3 Posted March 26, 2017 I had a Honda dirt bike once and it would quit after warming up and lost spark so I replaced the coil and that corrected the problem 1 Share this post Link to post Share on other sites
953 nut 51,940 #4 Posted March 27, 2017 I think you have a bad fuel cap vent, once you use a portion of the fuel the tank is under a vacuum that the fuel pump can't overcome. Next time you use it try backing off on the fuel cap a bit (be sure the tank isn't too full). If it keeps running buy a new cap; worked for me. 4 Share this post Link to post Share on other sites
Daddy Don 893 #5 Posted March 27, 2017 I had a coil breaking down that did the same thing. Share this post Link to post Share on other sites
Adams94 1,065 #6 Posted March 27, 2017 If it isn't the gas cap I would change the coil! 1 Share this post Link to post Share on other sites
DTOM 124 #7 Posted March 27, 2017 Ohm your primary and secondary of the coil first before buying one. 2 Share this post Link to post Share on other sites
953 nut 51,940 #8 Posted March 27, 2017 (edited) On 3/26/2017 at 5:52 PM, bo dawg said: So would it be correct to assume its the coil doing this? If it isn't the fuel cap and is heat related it may be the coil, or not. One other heat related ignition component would be the condenser, and you can operate the engine for short periods with it removed from the system. When the engine quits remove the condenser wire from the coil "-" terminal and see if will fire. Edited March 27, 2017 by 953 nut oldredrider corrected me. 2 Share this post Link to post Share on other sites
pfrederi 17,170 #9 Posted March 27, 2017 Test it cold then est it when teh unit has shut down 2 Share this post Link to post Share on other sites
oldredrider 2,547 #10 Posted March 27, 2017 (edited) Condenser should be attached to the - side of the coil. Edited March 27, 2017 by oldredrider 2 Share this post Link to post Share on other sites
953 nut 51,940 #11 Posted March 27, 2017 2 hours ago, oldredrider said: Condenser should be attached to the - side of the coil. Thanks for catching that, I have edited my post. 1 Share this post Link to post Share on other sites
bo dawg 478 #12 Posted March 29, 2017 Sounds like a plan I will check these things when it shuts off. Although I used it last 2 days rolling and mowing the 2 acre yard and it ran the whole time. (after sitting all winter). Thanks everyone! 1 Share this post Link to post Share on other sites