Quote:
Originally Posted by bruceincam
The spark arrestor works by exposing any flame to a large number of small surfaces (the screen). A flame front exposed to such a device will get broken up by the screen and as a result cool to below the ignition point and become self extinguishing. In theory at least ----
If you want a better explanation, just search for "spark arrester" and read on --------
Now, full disclosure, I've removed mine because of the difficulties it offers in refueling at the service station. It's hard enough to lean over the fenders and the cowl.
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My 29 Phaeton came to me without one and since I look down into the tank when filling I never put one in.