BigDaddyR
Addicted to ArboristSite
Not sure it gains anything
My thot was without it lets more air in around cylinder there for stays cooler
Ron's thot was it refracts heat from muff away from cylinder
Both make sense
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I can see the points. Until I looked at the IPL I didn't realize it had anything to do with EPA. So with more heat at the cylinder burns better? Less heat at exhaust port building up I would think w/ the sheild.
Rick