mpottorff

Have a pair of 496MAG HO in a Baja 302. Question it looks like the NGK BP7HS is the stock plug...correct? Is that the best plug to run in these motors?
Thanks
Mike

Boat Tech

Just be carefull from what I have hered You really only should be running OEM spark plugs And that would be AC delco. I am not 100% sure on the ngk plugs, But when I looked up your engine in the ngk web site I did not see the part number you came up with at all, Here is what I found at ngk. MERCRUISER 496 Mag HO Stern Drive 8 cyl Chevrolet Big Block

Spark Plug Part No. Stock No. Plug Gap Photo
Platinum PZTR5A-15 7862 0.06 Or here is the link I found it on.http://www.ngksparkplugs.com/apps/motorcycles/SPARK PLUG, And here is the AC delco
Part Number: 41-983 for that engine. Or merc part number might be 863622001 if it has not [SS] to another number by now.
Product Notes:
[Platinum Plug-Spark Plug]