sears suburban ss15 wiring problem HELP PLEASE

[Jon in Ohio]

i have the engine on my tractor back together and tried starting it and there is no spark. i have just replaced the magneto with a new one and still no spark. i just pulled the box open where the points are and noticed that there is only one wire going to the points and i believe there is suppose to be two wires. does anyone here know where on the internet i might be able to find a wiring diagram on this engine. i really want to get this thing running.
thank you for any help you can give me.
you can email me at [email protected] or just reply to this message.
thank you and have a great day.
jon in ohio

 

[joe csuti]

On a mag ign system there is only 1 wire to points,same makes/breaks ground to primary on ign coil.Check that wire from points to coil isn't nicked/pinched by sheetmetal & shorting to eng block,also check for circuit thru wire,may be broken.Remove plug,disconnect coil wire & cond lead from points,connect an ohmmeter or powered test light between block & terminal on points,rotate eng by hand,when points close you should have a 0 ohms reading or light will be on,if not points dirty,pitted,worn,incorrect point setting(.020")try cleaning points & regap,if still no circuit thru same points bad & need replacement,also check push pin for points,may be worn/broken/missing,if points working ok,replace condenser,same may be bad,check that you have correct air gap between coil & flywheel magnets as per factory specs,if eng already mounted on tractor,disconnected ign kill lead to ign sw,crank eng,if you have spark now,problem on tractor(ign sw/safety sw)still no spark with lead disconnected,problem on eng.Get a repair manual from local dealer,eng mfg website or ebay on cd/paper that covers your make/mod eng,in ign section of manual will explain how ign system works & troubleshooting same.