Spark plug for 3.0L 90's

[Koolman_A]

Hi, I'm new to boating and want to do a tune up on my 3.0L mercruiser engine but can't get the exact same spark plug.
The plugs I removed are NGK's BPR 5 FS.
I can get BPR 4 FS but am not sure they will work for my application.

Any suggestions Please...

Thanks,

 

[Laddies]

Re: Spark plug for 3.0L 90's

OF353100 and below RV15YC4
OL010042 and above RS12YC
3,0LX-------------- RS12YC

 

[wcsparky05]

Re: Spark plug for 3.0L 90's

any local auto parts store will be able to get you a comparable plug. the gapping is the important thing. don't waste your money on pre gapped plugs... a gap tool costs .99 cents. you might as well change your wires and points while you're in there