I don't know if the gap reader I have is not accurate and the NGK gap is spot on 1.5mm.Ĭan someone here shed some light on this please. Looking for the gap chart of NGK on line, I had no luck. The larger the gap, the more voltage is needed to jump the gap. The gap should be adjusted by only moving the ground electrode. Spark Application Guide MAGNUM MV20, M20, RV17YC, UR4 TRIAD (ALL), RC12YC, BKR5ES KAWASAKI ENGINE, CHAMPION, NGK FE SERIES 3.0HP - 13HP, RN11YC4 or N11YC. STIHL Chainsaw Spark Plug Charts: Know the Size and Plug Gap with Compatible Models STIHL models, Spark plug size, Thread size (approx.) MS200T, BPM7A NGK. The voltage requirement is directly proportional to the gap size. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium, be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. It is always best to check the gap against the manufacturer's specifications. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy and accelerated plug wear. Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine. A spark plug part number might fit hundreds of different engines from many different manufacturers. Consult a recommendation list or vehicle manufacturers handbook for individual gap settings. These figures are for guidance only and may vary on certain engines. No, the electrode gap of NGK Spark Plugs is meticulously controlled when manufactured, and due to the very large selection of plugs, the electrode gap is set to suit the vehicle as recommended in our catalogue.Ī: Maybe. The conventional gap settings are as follows: Racing Plugs 0.016' 0.4mm. ngk spark plug upgrade chart original plug stock no. I bought NGK spark plugs for my vx commodoreīut measuring the gap, it is not the 1.5mm specified with the gap reader (not the type recommended by NGK) which you can measure the gap by sliding the gap (of the spark plug) into the side until you get the corresponding thickness.Ĭhecking NGK website, in one area it says do not change the gap and another it says 'maybe':įor the NGK do not change pr check the gap.
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