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No, the 661 tunes itself, but when it does lean out, the popping subsidies unless partially loadedHmmm. Interesting. So you actually have to lean it out to get rid of the popping?
Very odd.
also...... when a more restricted muffler is installed, it doesn’t pop at all
The 346 is tuned to 15,500 ...... by all measures its lean enough. Even she does it at partial loads with full throttle. When I have the muffler that was on her in the Ct GTG videos (a normal dual port muffler mod) she doesn’t pop at all
With these mufflers, partial load, full throttle, & proper tune; it’s going to be popping.
Try it yourself, I’m curious to see if pulling the front cover on a Stihl muffler without an inner baffle will cause yours to do the same thing
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