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no choice if NLA… but they should be available..
for now just polish them up and see if you have sparks. check condensers !! or simply replace them…they are there to stop this pitting.
Testing them with a VOM or capacitance tester is not sufficient
IF bad (open or shorted) they are bad
IF tested OK… you still never know how they will perform under load and heat so best to replace them otherwise to be 100% certain you can always build yourself ta condenser tester.. I did worked great
see parts 1-4 oncondensers… part 2 covers the test box design by mr. Mohat… write to him for plans
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Drill down this site in the OUTBOARD Merc 500 2 stroke ARCHIVE sub sections for breaker part#s…for your serial number on theengine .. look in EBAY
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