My owners manual calls for a 41-952 spark plug with a gap of .060, I know this was later changed to a 41-974. I just bought new plugs and got 41-985's with a gap of .040 (clearly marked "do not change gap"), I checked with a dealer and was told these are correct.
Does anyone know why this change was made? Seems strange because now the emissions label is incorrect. I found some other brands (NGK for one) which still have the.060 gap. Any reason to pick one over the other?
Thanks, Al