5.7 magnum 350 spark plugs?

[badger32]

Hi I have a 1992 Mercruiser 350 magnum ski carb serial number 0d715800.
Having trouble finding correct spark plug I bought bpr6efs but found out they are long reach compared to what's in as they are bpr6fs which has a short reach, my question is which is the correct plug to use or will the long reach plug be ok?
Thanks for any help.

 

[Bondo]

Re: 5.7 magnum 350 spark plugs?

Ayuh,.... Yer motor Should take the shorter plugs, the long 1s are for Vortec heads, which came out in '96 or so...

 

[Don S]

Re: 5.7 magnum 350 spark plugs?

According to your serial number, it should be the AC-MR43T or NGK - BR6FS

 

[badger32]

Re: 5.7 magnum 350 spark plugs?

Thanks for confirming this
Cheers Anth