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Honda has been using plastic cams all the way back in the 80s hs21 mowers, never had a bad one of those, never had a bad hrs or hrx cam til the current year models.... so in a sense you would be wrong.... as the plastic cams are lasting 40 yrs or better, just the current quality control is not...

Honda has used plastic cams for years with no issues, not sure what changed (without getting extremely political which i dont think needs to happen here) but rhe tolerances are off on the cams compression release...

So, the issues with the honda cams is that the compression release stick in the run position... replaced 3 of them before the stop sale, still waiting to hear from honda on the course of action, considering the replacement cams are potentially prone to the same issues...