QuestionThank the Lord it's the end of the season, 'cause my tractor is a tired pup!
I have a 13 yr old Montgomery Ward 14 HP tractor. Last week I had to change a spindle shaft because of worn bearings. I also changed the starter drive.... cost $85
Now, this week..... I was mowing right along and things were going great with the new parts. Suddenly the tractor started missing and backfiring. I just barely got it back to the garage. I parked it because it was getting late. Today I had a heck of a time getting it started and all it wants to do now is backfire through the carb. I finally got it started.. it did a lot of missing and backfiring, then settled down to a nice idle. I tried to give it some gas, and it backfired, missed, and tried to stall out.
Today I took the carburetor off and sprayed it thoroughly with carb cleaner and put it back on.
It still wants to is backfire through the carburetor, and it's not starting. This makes no sense to me. I have installed a new plug and a new fuel filter. Still no change. Can these motors just jump timing as you're driving along? It was running great!
This is the first time in 13 years I have had any engine/carb issues with this tractor.
Its a B&S 14 HP Model series 287700
Any help would be appreciated.
Jackie
AnswerIs your engine and OHV engine? If so then the valves may need to be adjusted.
Flywheel keys can cause backfiring but they rarely shear on riding tractor engines.
Let me know the type number and I will look up the valve gap for you.
I highly doubt the engine jumped time.
Send me the type and code number.
Eric
