1971 Mercury Outboard 7.5 HP Spark Plug Question

[Gruber74]

Thunderbolt Ignition Serial# 3020217<br /><br />Can anyone direct me where I can find the following?<br /><br />What is the point gap?<br />What is the spark-plug gap?<br />Type of spark-plug recommended?<br /><br />Any information would be appreciated.<br /><br />Thank you

 

[Barnacle_Bill]

Re: 1971 Mercury Outboard 7.5 HP Spark Plug Question

Point gap should be .020<br />Plugs are NGK BUHW-2 (perma gap)<br />If you use the motor mostly for trolling, go with something like Champion L-77J and gap them at .050.