For a 1970 OMC 6HP engine, the recommended spark plug is the Champion J6C or an equivalent plug
Per Champion spark plug applications chart, the gap for 6hp Tecumseh engine is .030
It is 0.030" for an L-head engine.
Johnson 6hp spark plug gap
.035
The correct plug gap for the 1971 model, 6hp Johnson outboard, is .030-.035 in. It requires a Champion J6J, or NGK B6S.
45 thousands to 60 thousands, if you dont have a gauge use a match book cover, its 45 thousands thick, small engine mech,
The appropriate spark plug for a 6HP Tecumseh H60 Snow King engine is typically the Tecumseh part number 36079 or an equivalent. The recommended spark plug type is usually a Champion J19LM or a similar model. When selecting a spark plug, it's essential to ensure it meets the specified gap and heat range appropriate for the engine to ensure optimal performance. Always consult your owner's manual for the most accurate specifications.
It is usually a Champion plug RJ19LM. The gap is .030 inches. This plug is usually used with B&S engines from 3hp - 6hp.
If you are using NGK plugs, the plug model is BP6HS and the gap is 0.035. I had to look it up also for my 6HP Suzuki outboard on my sailboat.
RJ8C Champion
The gap setting for a Briggs and Stratton spark plug in a 6hp engine is typically 0.030 inches (0.76 mm). It’s important to check the engine's manual for specific recommendations, as variations may exist based on the model. Proper gap adjustment ensures optimal engine performance and efficient combustion. Always use a suitable tool to measure and adjust the gap accurately.
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