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The stop wire or switch, grounds to 'earth' the coil to stop the engine - suggesting there must be a short or integrity failure ?
How you fix it? I am not sure on B&S engines...but this might help:
http://www.haynes.co.uk/webapp/wcs/stores/servlet/ProductDisplay?ca...
i think you use fire to fix it properly!
...though if its a ground probably good cleaning will help...if there is one thing i do know about 46s, they do seem to like collecting as much recycling material as they possibly can!
thank you for stating the obvious-sincerely-not sarcastically : )
Confirming the bleedin' obvious :-) ...B&S Repairs Website :
Spark Problems
Always try a new plug first.
To check for an efficient spark, remove the spark plug, attach a spark tester to the plug lead terminal(a tester plug can be made by opening the gap on a known good plug to about 3 mm), ensure any stop switches or mechanism are not active, restrain the metal body of the test plug against the engines metal surface away from the spark plug hole, pull the engine over and look for a good spark cracking across the oversized gap.
If there is no spark check the ignition as follows:
Electronic ignition (Magnatron etc.)
Remove the engine cowling to access the ignition armature. Pull off the small stop wire connector from the body of the ignition unit. Re-fit the cowling and repeat the spark test. If there is still no spark then the armature unit needs replacing. If there is now a spark, the problem lies with the stop wire system.
Points ignition
Disconnect the stop wire from the points at its cut out post(usually with the throttle bracketry). Repeat the spark test. If there is still no spark then the problem is either with the points/condenser set or the coil. The points can be replaced but the long term repair would be to replace the old coil with a new electronic ignition armature. On no account consider cleaning the points, this is at best a very short term solution.
If after disconnecting the stop wite a good spark returns, the problem is with the stop system.
....waggle stop wire in air until spark resumes.
much netting and webbing later i still cannot find the correct incantation to revive the spirit of the stop wire gods. i will now go bow to the wet one and to the dry one and see if it can reinstall my dwindling faith in this dark apparatus.
i think being locked in the workshop with a couple of hondas isnt helping the situation.
I can't help as my Etesias have Honda engines but I did enjoy reading your comment :)
It's all about electrickery!!
i think it was baldrick that coined this term 'electrickery' and im beginning to think he was also responsible for briggs bombproof design.
i think an ant farted on mine. thats when it all started to go wrong.
im going to hang another 20 loose wobbling springs on it, selotape a few downy feathers here and there and dress it with a magic crystal and see if it sorts itself out.