Kaw FC420V as11 on John Deere walkbehind . I bought had not run in 20 years. I changed coil, ignitor, & spark plug. Engine ran great for 45 mins. 2 weeks later it would not start. I changed plug, same results. I got tired of pulling rip cord and put a starter on it. plug will spark once in awhile but engine will only back fire (seldom). Do you have any idea why the plug will fire once in awhile (seldom) and spark is blue. Thanks
↧