spark plug number

[arboatdr]

A customer of mine brought me several cases of new spark plugs since he sold his boat but I can't find a cross reference for them. If anyone knows what they fit I would be grateful.<br /><br />RV91 MC<br />QC12GMC<br /><br />I believe the rv91mc is the short version of the rv15yc4 but am not sure. Thanks, DH

 

[rabidfish]

Re: spark plug number

The RV91MC is a marine plug that Champion developed with Mercruiser. Mercruiser for a short time actually used the RV92YC as a replacement for the RV8C. Later, alot of dealers took it upon themselves to use the RV15YC4(OMC recommendation ) Mercuiser now uses AC plugs from the factory, but sells NGK in parts. (BR6FS)

 

[arboatdr]

Re: spark plug number

Thanks Rabidfish! Any ideas on the QC12GMC plug?

 

[KCLOST]

Re: spark plug number

Champion Racing series 950M QC12GMC $3.48<br /><br /> Champion QC12GMC<br /><br /> Champion RV91 MC