1988 merc 3.0 sparkplug question

fairshopperguy27

Petty Officer 2nd Class
Joined
Aug 22, 2012
Messages
127
Does anyone know which plugs to use in a 1988 mercruiser 3.0 w/upgraded EST ignition. The manual calls for champion rv12yc which is whats in the engine currently. I bought some ngk bpr6efs but am a little hesitant to put them because the threads are longer. thanks in advance.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: 1988 merc 3.0 sparkplug question

You don't have the proper head for the BPR6EFS plugs and you really don't want those champion plugs either.

Use either the MR43T or the NGK BR6FS
 
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