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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 13581
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Simplicity mower (quite old) running ok but one cylinder was

Customer Question

Simplicity mower (quite old) running ok but one cylinder was starting to give out frequently. Checked spark and found it to be dropping out. Decided to replace both coils with new ones. Now I get spark in both cylinders but has only started once, mostly just backfires through the carb. And on several occasions when I let off the starter it actually ran backwards for several seconds. What could be wrong?
JA: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?
Customer: Yes to all the above.
JA: Do you plan on doing the work yourself?
Customer: Yes, have so far.
JA: Anything else we should know to help you best?
Customer: Not that I can think of.
Submitted: 10 months ago.
Category: Small Engine
Expert:  Curtis B. replied 10 months ago.

Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

Expert:  Curtis B. replied 10 months ago.

What engine is this? Did the new coils get gapped at .010 inch?

Expert:  Curtis B. replied 10 months ago.

Does the enginehave solid lifter?