Chrishar 718 #1 Posted October 14, 2019 (edited) Have a 702 wheel horse with k161 motor it sounds like it will almost die then it will backfire throw the carb. And run good for a little bit then do it again I replaces the coil, points, considered, plug, plug wire and try another carb. too i rebuild the motor 2 years ago ran good until 2weeks ago then started do that need help please and thank you Edited October 14, 2019 by Chrishar Share this post Link to post Share on other sites
wallfish 18,143 #2 Posted October 14, 2019 Just a guess But maybe exhaust valve sticking. Typically a back fire through the carb indicates the exhaust valve is not fully seated during ignition. Maybe timing advanced if the points are loose? Carbon buildup on exhaust valve holding it open? 4 Share this post Link to post Share on other sites
953 nut 60,083 #3 Posted October 14, 2019 1 hour ago, wallfish said: Maybe timing advanced if the points are loose? Carbon buildup on exhaust valve holding it open? Use a timing light to set the points and see if the problem goes away. Share this post Link to post Share on other sites
richmondred01 2,307 #4 Posted October 16, 2019 Start with the easy stuff. look at what walfish said then also if that’s not the issue then pull the flywheel and make sure the key isn’t sheared. I can’t tell you how many “rebuilt” engines I’ve had in my shop that the owner didn’t torque the flywheel resulting in the key being sheared or keyway on the crank being destroyed. Share this post Link to post Share on other sites
Chrishar 718 #5 Posted October 30, 2019 Thanks for the help it runs good again the points were off 1 1 Share this post Link to post Share on other sites
