SOURCE: ignition point gap and spark plug gap inboard outboard omc
.019 for the points and .035 for the plugs
SOURCE: tune up specs for honda outboard
You have probably already found an answer, but all the specs are in the owners manual. If you do not have one, you can download one for free from honda-marine.com under the owners section. You will only need the serial number for your engine.
SOURCE: Need the points gap and plug gap for a 1978 Yamaha 15C 15hp outboard motor
try this
http://www.yamaha-motor.com/assets/service/manuals/2004/lit-18626-05-34_869.pdf
manuals are freely available on the yamaha website
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