I'm having similar issues with my snapper with a honda engine.. I had it serviced back in feb used it a couple of time then it started backfiring but it did nt do it till it warm up. I have changed the plug on it. it was in bad shape which made me question if the shop i used to service my mower did the job right.. what can i do to fixed the problem..
Thanks for any info anyone can give me!
:welcome:
First advice is not to tack a new problem onto an old thread.
It gets very confusing
Second piece of advice is to list your engine numbers, both model & serial it makes things a lot easier.
Third piece of information, is to be specific "bad" is not much of a description , oily, sooty, tip melted, gap closed down.
These things are important.
AS for your mower, start with the basics, take the fuel line off, drain the tank start the mower & run the fuel out.
Now refill with fresh clean fuel and fit a brand new plug.
A bad plug or HT lead will cause the engine not to fire on that stroke but the unburned fuel can ignite in the muffler causing a backfire.
Or it can backfire through the carb fo different reasonas again.
You need to think of us as blind & deaf.
Tell us what you see, hear & smell.
