Need the model. the folowinjg are 6.5NH models. these are most of the plugs onan uses. Different models can be different than these so call Cummins Northwest as they build the onan.
Spec A & D -- RH8C or H8C Gap .025
Spec J & K -- RN5C or N5C Gap .025
6.5 NH-3CR-16004N -- RN5C or N5C Gap .025
6.5 NH/3CR/16004P -- RS17YX Gap .025
Probably a RH8C Champion plug Plug gap is .025
the plug gap for generator is 0.70 mm
The correct gap is .035.
The Coleman PM 1850 manual calls for a spark plug gap of 0.028" (0.6-0.7 mm). Mike
.035Answerhttp://www.championsparkplugs.com
.30
The spark plug gap is 09.96 The spark plug gap is 09.96
.045 spark plug gap
spark plug gap for a 2.2l is 0.060"
spark plug gap is .044
The spark plug gap is .054"
0.9MM with spark plug gap tool.