Grumpy is right, as regards new parts.
However, if the coil needs to be replaced, we usually recommend fitting a secondhand post-1982 'Magnetron' coil/ignition module unit. This does away with the points and condensor, and the need to service those items. A unit off any post-'82 4hp or less Briggs engine will fit.
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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