This spark plugs will fit RCGF Stinger 15cc RE,20cc RE,35cc SE,35cc RE ,70cc Twin engines.
Gap: 0.018″ to 0.020″
NGK-CM6 spark plug
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The NGK CM6 spark plug has been my standard go-to plug. However, my New Stinger 15RE came with a RCGF Iridium spark plug which has also worked very well.
Stay with NGK. They work.
Best quality
Better than stock
It’s all good.