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Glow plug

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Is this the way how to use a glowplug

Hot plug- Cold weather?
Cold plug -Hot weather?

correct me if i am wrong:)
 
Weather temps aren't a big factor. Higher nitro content,cooler plug. Lower nitro content,hotter plug. And smaller engine,hotter plug. Bigger engine,cooler plug. At least the manufacturers say it,but I haven't noticed engine size making a big difference either.Tune for the combo you have.
 
I've never used anything other than medium hot with 20% in my 3.3 and I haven't really had too many problems, other than being a noob
 
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