78 Johnson 6hp stalls after 15 min of running

njmedic3306

Seaman
Joined
Apr 27, 2010
Messages
69
I have a 78 Johnson 6hp that starts great, runs for about 15 min then if I drop the RPM it will stall and give me a struggle to restart for about 10 min. I am thinking its the plugs. I know I saw it on here before but what is the recommended plug and gap....??? I am thinking its a simple fix.
 
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