Antiquated 3 #1 Posted April 6, 2014 I've got a 1980 K321 I'd like to swap out a new spark plug on and I checked out my manual to see what the correct gap is. The manual said: Battery/Breakerless 0.035" Magneto 0.025" Gaseous Fuel Engines (Magneto/Battery Only) 0.018" I'm not sure which I category my engine falls under although I don't think it's gaseous fuel. Advice? Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,539 #2 Posted April 6, 2014 The 1980 C-145 used a Kohler K321AS-60362d engine with battery ignition. Gaseous fuel is natural gas or propane. Garry Share this post Link to post Share on other sites
Desko 552 #3 Posted April 6, 2014 I don't have a clue about Kohler but I gap all my plugs at .030 and it works great with the Onan, Briggs, and Tecumseh Share this post Link to post Share on other sites
