Quote:
Originally Posted by Schurkey
If the fuel mixture is right--the engine isn't rich. Changing heat range may change the amount of deposit on the plug, but it's not changing the fuel/air ratio.
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I actually screwed up and was running the R43S instead of the R45S. Changed out the 43's for the 45's and problem solved. Exh. is leaner, spark better, and all other factors unchanged. Who would have thought!
