My manual says, that I'm supposed to use the NGK BR9ECS, with a gap of 0.45 mm, +/-0.05mm. I just bought 4 new plugs, all with the gap running about 0.71mm. Which is way over what they are supposed to be, but the manual cautions specifically not to adjust the gap on the BR9ECS. So what's a guy to do? Thanks for the help.
