Proper spark plug for 88 Merc 100 hp?

[elan86]

Would any one be able to tell me what the proper plug would be for my 4 cylinder 100? Bought the engine from a guy with it on a bass boat and havent acquired a manual yet. Thanks in advance!

 

[Dave1027]

Re: Proper spark plug for 88 Merc 100 hp?

NGK BUHW is the best for this engine. It's the first plug recommended in the Merc manual.

 

[elan86]

Re: Proper spark plug for 88 Merc 100 hp?

Thanks Dave. Thats what I have in there. Appreciate it.