2005 0 #1 Posted April 26, 2020 just got my 18 horse wheelhorse out yesterday and started on cutting grass....after an hour or so it shut off??? started right up and I continued....and now every lap it shuts off???? what should I be lookin for???? brian Share this post Link to post Share on other sites
pfrederi 18,670 #2 Posted April 26, 2020 Loosen your gas cap. Also hook up a spark plug tester leave hanging out the side of the hood so you can see it as you mow. to see if it is loss of spark causing you r problem. Share this post Link to post Share on other sites
8ntruck 7,833 #3 Posted April 26, 2020 What model is it? If it is one with lots of safety switches, one of these could be the issue. Share this post Link to post Share on other sites
2005 0 #4 Posted April 26, 2020 35 minutes ago, 8ntruck said: What model is it? If it is one with lots of safety switches, one of these could be the issue. 518----im gonna guess its over 30 yrs old... Share this post Link to post Share on other sites
2005 0 #5 Posted April 26, 2020 3 hours ago, pfrederi said: Loosen your gas cap. Also hook up a spark plug tester leave hanging out the side of the hood so you can see it as you mow. to see if it is loss of spark causing you r problem. I checked on the breather hole in gas cap...thought it may be plugged...but I can see straight thru it... Share this post Link to post Share on other sites
lynnmor 7,817 #6 Posted April 26, 2020 I am going to guess that you have an 18 HP Onan. The ignition modules can fail as the engine gets hot. Share this post Link to post Share on other sites
2005 0 #7 Posted April 26, 2020 yes..that is what I have...518...I will look into ignition module....thanks!!! Share this post Link to post Share on other sites
