Spark plugs Yamaha 150 carbed

[Blue_Runner]

Here is the story. With saltwater use I like to change the plugs in my 2004 Yamaha 150 every year. Well, I went to buy plugs this year and got the number off one plug so I could buy the new ones. NGK BR8HS-10. So I bought 6 BR8HS-10 plugs. Got home, went to replace them and realized I had 1 BR8HS-10 and FIVE BR7HS-10 in the motor all season. So, my questions....

1) Any repercussions from running like this all this time?
2) Should I go back with BR7HS-10, or BR8HS-10. I think one is hotter, but not smart enough to know which one.

I looked at them and with my untrained eye they all appear to look good and about the same across all 6.

Apparently when I bought them last they accidentally gave me one BR8HS-10 and I did not notice. I am thinking BR7HS-10 is what I want but need expert advice!!!!

p.s. note to self - always double check new plugs are the same before you put them in!

[spareparts]

8s are one heat range colder than 7s, you'll be fine. If you are a doing a lot of trolling, the 7's may serve you better

[THEFERMANATOR]

Pretty sure the br8hs-10 is stock for yamaha. I believe the old engines that didn't have a csi box used the br7hs-10.

[spareparts]

should be a sticker inside the lower pan somewhere with the plug recommendations

[Blue_Runner]

No more than 5 seconds after reading that last post I found the sticker in the lower pan. BR7HS-10! Thanks guys!!

[steplift20]

These guys are a lot smarter than me about these things but what I would do is go with what is recommended for that engine Why you ask? Because when they build that engine it was designed to run on those plugs