How do I repair my 4 stroke Lawn Mower and its ignition coil?

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Matthew

I have a 4 stroke Lawn Mower from G.M.C and it now doesn't want to start. I now have 2 problems when I only had one before. The first problem was that it wouldn't start despite having petrol and having the sludge removed from the deposit cup on the carburetor and having spark from the plug..

I now have a 2nd problem and now there is no spark coming from the plug after testing the lead with another plug. I have removed the top housing from the lawn mower and noticed it has a coil that contacts with the part that revolves after pulling the starter string.
The surface does look a bit rusted all around, where the flywheel is on top of and where the coil has contact with. It has a powdery surface that is somewhat slightly rusted.

Answer
MIGHT TRY cleaning the surfaces of the magnets on the flywheel & the surface of the "coil " with emery cloth ( sand paper )...and also, there is a aluminum key in the fly wheel & crank shaft,
its purpose is to shear if the blade hits something. If its only sheared a LITTLE BIT, you'll not have any spark

Where can I buy an ignition coil for 4 stroke lawn mower?

Matthew

I have a 4 stroke lawn mower from G.M.C and this thing just doesn't want to start after letting it out in the rain a number of times. I have cleaned the deposit cup from the carburetor, petrol in the tank, and have checked the plug for a spark which did have a tiny spark. I tested it with another plug and had no spark and placed the original one back in and no longer a spark.

I removed the top housing and realized that the coil has a contact with the part that revolves when the starter string is pulled.
Also can I just use the existing gaskets and seals by tightening the nuts a little tighter to ensure a firm contact on surface?

Answer
give a light rub / clean between the contacts with fine dry " wet n dry " paper .. do not do any adjustments with the rotor and contacts with spanners or drivers ... buy new plug .. spray all electrics with " CRC ".. good soaking ..wipe excess off then allow to dry ...prime carby ready to start ...put engine ready on compression stroke ... spray some " Aerostart " in carby throat ... wait a few seconds ... try starting ...

as for the gaskets ..if not broken smear some general purpose grease or a light application of non hardening silicon on both sides before re assemble ... seals ... liberal coating with clean engine oil ... do not over tighten nuts ...up firm .. then 1/4 more turn should be enough ...

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