why are they listed as different brands in the manual? Bosch USR7AC vs NGK CMR6H? Why wouldn't it be the same brand either Bosch or NGK w a one number heat rating difference?
If memory serves a USR7AC would be a CMR5H
I just realized one of my ht131s is actually a 101 (numbers are all rubbed off, air filter gave it away) Almost had a moment when I realized I was running the NGK CMR6H in the 101, but since thread depth (and of course size and gap) are the same, am I doing any harm running a single heat rating too hot in the ht101? Sure would be nice to have em interchangeable
If memory serves a USR7AC would be a CMR5H
I just realized one of my ht131s is actually a 101 (numbers are all rubbed off, air filter gave it away) Almost had a moment when I realized I was running the NGK CMR6H in the 101, but since thread depth (and of course size and gap) are the same, am I doing any harm running a single heat rating too hot in the ht101? Sure would be nice to have em interchangeable