Have experienced this in both our '17 and our '20 (that has the redesigned exhaust system). The spark arrester on the end of the tailpipe becomes clogged with carbon deposits from the exhaust. If you remove the arrester the problem is solved but you increase the exhaust noise - especially in the newer redesigned system that discharges to the drivers side vs the back of the cart as older models do. Carts and Clubs solution was to clean the arrester and then poke some small holes through the steel wool like material to allow it to breathe more freely. Causes a very slight increase in exhaust noise but not nearly as much as removing the arrester.
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