3.0 spark plugs

sat1962

Petty Officer 2nd Class
Joined
May 26, 2008
Messages
106
I have a 1987 merc 3.0 the spark plugs in it were ac delco mr43T the local marina told me it needs champion rv15yc4 the manual says champion rv8c or ac delco mr43t or ngk Br6fs. The marina said that mercruiser has changed plug required anyone know what i need to use thanks in advance.Also the marina recomended plug seems a tad longer .
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: 3.0 spark plugs

Stick with the AC or NGK plugs. Forget the Champions,
 

sat1962

Petty Officer 2nd Class
Joined
May 26, 2008
Messages
106
Re: 3.0 spark plugs

Don how about autolite crossed to the ac plugs? thanks for the reply
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,465
Re: 3.0 spark plugs

ac delco mr43T

Ayuh,.... That's the Plugs you Need.....

Merc didn't Change anything,....
My Guess is,... Those Champions are all the Marina had on the shelf.....
 
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