Can I “one up” Cobber’s exciter wire. This wire provides current for the starter solenoid & if you have a poor contact, intermittent problems are experienced.
If you slide your hand down the rear of the engine, around the charcoal canister, & locate the contacts on the starter motor, give them a wiggle when problems arise. If you can regularly overcome your problems by doing this, change the contacts, usually .325 lucars.
If not I’m with the rest of the lads.
Actually change those contacts as a matter of course, do that properly & the chances of there being a problem with this is reduced to very little.
M