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Matchless WG3L Spark Plug


DaveP

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G3L spark plugs were 14mm with a 1/2" reach. Original fitment would have been either KLG F70, Champion L10 or Lodge H14

Accepted substitutes could be:

Champion L82C or L86C

NGK B6HS or B5HS

Bosch W7AC or W8AC

 

The first plugs listed are colder than the second, and if your engine has a tendency to oil up then you could go with the hotter plug. If, however, you've removed the compression plate I'd stick with the colder plug regardless. A cold plug at worst will stop functioning, a hot plug can melt a piston :(

If in doubt you can always do a plug chop to see how things are going.

Cheers,

Stef

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Thanks for the info Stef, need to give the old girl a bit of a tune up and couldnt seem to find a reference to a modern spark plug. The motor actually starts very well but does have an odd little misfire when warm, hope a new plug and some fine adjustments will sort it out.

:tup::Thanks

DaveP

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