My Husqvarna rancher 55 just started to choke down and suddenly just quit running. Saw is only a few years old and not used that often. It had been running just fine till this time.

After checking out saw I found that the piston and ring were damaged. I replaced the piston and ring but then all I could get the saw to do was idle. When you accerlated it would die. I couldn't find anything else wrong so I took it to a lawnmower repair center and they said the carberator needed to be replaced. I installed a new carberator and still won't start and now won't even idle. I thought that I didn't have a spark and took it again to the lawnmower shop and they put a light between plug and coil and about every 3 or 4 pulls it would spark. They said they couldn't explain why it wasn't sparking on every pull.

What I've already done:

Replaced head and ring

New tank gas filter

New spark plug

New carberator

Any suggestions as to cause,,,,,,,,,could it be a partially defective coil ( not sparking on each pull )

Any help would be appreciated. Thanks,,,,,,