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colder spark plug

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Old Jul 24, 2007 | 10:13 AM
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Default colder spark plug

For Champion # RA8HC, What is the one step colder # ?
 
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Old Jul 24, 2007 | 10:34 AM
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Default RE: colder spark plug

ORIGINAL: desertbagger

For Champion # RA8HC, What is the one step colder # ?
For most domestic plug manufacturers, the lower the number the colder the plug, so a RA7HC would be the same plug one step colder. FWIW, the opposite numbers Vs heat rangeapplies to most foreign plug manufacturers, like Bosch, NGK etc.
 
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Old Jul 24, 2007 | 12:21 PM
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Default RE: colder spark plug

What geargrinder says is correct but I believe the next step colder is actually an RA6HC. Not sure there is a 7.
 
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Old Jul 24, 2007 | 12:45 PM
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Default RE: colder spark plug

Cooler plug doesnt always mean cooler head temps,sometimes it just the opposite.
 
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