I have gone both ways with and without the carb spacer and really didn't see any notable difference. I think the pullers run a spacer and it probably makes a difference on a modified motor. I beleive it has something to do with atomizing the fuel but not 100% sure. Sam Mac will know more about this topic I'm sure.
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1641, 1541, 682 with 18hp command engine and hydraulics from a 782. 1872 with a power angle blade.
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