28607 possible ignition issue - not really sure.

[yinmeout]

I would like to canvas the wisdom of the membership on the following problem. I have a 286707 engine in an old snapper 28" RER which just runs beautifully. Always starts on the button or with a gentle pull on the rip cord. When she is cold full choke and away she goes, in summer sometime no choke from cold and she'll fire right up. Sometimes though, it will not start and when it does finally start it is so rich from all the excess full dragged in to the piston from trying to start it that I feel confident this is not a mixture issue. When it is having a moment, the fix is really simple, one of these two things cures it every time without fail. 1. Remove the plug cap and replace it. 2. Remove the plug as well as the cap and replace it all.

So is it a new coil time? Is the lead. Clearly all I am doing it agitating ignition lead by removing and replacing it. The lead is tight on the spark plug so I don't believe it is an electrical connection problem at this point. I have not had the blower cover off except for cleaning a year or so back so before I do that I wanted to get some ideas on this perplexing matter.

The guaranteed repro of the problem is fire up from cold on the starter or the rip cord, doesn't matter, run for about 5 mins and then stop it. If it's going to do it then next start will be the one where it does not fire up. If it does fire up, it will be fine all day.

Thanks !

 

[Auto Doc's]

I suggest you check Parts Tree for a replacement coil. You will need the rest of your numbers stamped on the starter cover.