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Can anyone tell me what the spark plug gapfor a 1998 mule is? Its a 2500 w/617 cc. Manual tells everything but that. Thanks.
 

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Plugs call for a gap of .032 to .036 What size is better for power? Does it even matter? Is one size better for fuel economy? 1500fi NOMAD
 

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Spark plug gap set within the specified range will be pretty much equal for power and performance on a Mule.

On a high performance engine it is a different story. You want them as close as you can manage to the smallest specified gap for the hottest spark and best timing to avoid pre-ignition (spark knock).
 
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