Spark Plugs Question

[c.fish]

I have a 1989 MCM 5.0/LX 305 230 Hp engine. Eng # OC535063
The manual call for AC.MR44T plugs.
My local marine did not have them. They said mercury recommends
NGK-BR6FS.
Would these be OK?

 

[Bondo]

Re: Spark Plugs Question

Ayuh,.....

Go to Napa or your local Autoparts Store,+ get the AC MR44T plugs......

 

[Don S]

Re: Spark Plugs Question

Yes, the BR6FS is the equivalant. The OEM manual also says it should be an MR43T, not a 44.

 

[f_inscreenname]

Re: Spark Plugs Question

Never buy anything from a marina except sodas and chips and even they are usually cheaper at 7-11 as over priced as they are.

The right heat range, cross-over plug and you should be fine.
What ever the book says I always tend to cross them over to AC's and run them. AC's for me are "Like rounds in a chamber" compared to other plugs.