The engine is most likely a Tecumseh engine. They specify an air gap for the
solid-state ignition module of 0.0125 inches between the core and the
flywheel. The timing is NOT adjustable.

The 143. engine number is not listed in the info I have, but many numbers
around it are.

Hope this helps.
Bob M.
======
"Judy and Dave G" wrote in message
...
Thanks for all the help and hints that you don't know you have given us!

Here's our question(s). We have a Craftsman power propelled lawn mower.
Bought in 1995. Only been run for maybe 3 hours tops. So everything
still
even looks new. Took it out, cleaned it up, drained it, tightened it,
etc.
But it won't start. Ordered a solid state ignition and put it in. Dave
thinks the problem may be a clearance problem but there are no
specifications in the owner's manual. This mower was from back when
everything Sears sold, had only Sears' name on it. So we don't know the
engine manufacturer. The mower is Sears model #: 917.376340 and the
engine
Sears model #: 143.966500. This is 6.5 hp engine takes plug RJ19LM.

Dave is trying to find out the specification for clearance between the
magnet mounted on the flywheel and the solid state ignition. When the
clearance is set at 2 - 3 thousandths, the mower would not start. When
the
clearance is set at 17 - 18 thousandths, it starts, runs rough and fouls
the
plug. Of course, at this time, he isn't really sure this is the problem.
So if anyone has any other ideas, please?

Hope there is someone out there who can help with this. Even if just to
help us identify the engine, or if there is a standard for clearance that
might work?

Thanks again for all your help. We really appreciate the time it takes to
give it.

Judy