Best spark plug brand

mike b.

Seaman Apprentice
Joined
Jan 28, 2002
Messages
37
What in you guys experiences are the best spark plugs for a Mariner/Merc 150 carbureted motor w/elec. igniton.Motor has NGK now,should I go back with these or Champions.And how often should I change spark plugs on an outboard?Boat has an hourmeter plugs were changed at 20hr service 1yr ago.Motor now has 60hrs.Should I just clean them or replace?
 

Joe S.

Seaman Apprentice
Joined
Apr 14, 2002
Messages
45
Re: Best spark plug brand

I'd recommend changing out the plugs at least once a season. Many people have their preference on plugs mostly based on whether they are American made or not. I have run both Champions and NGK's in my toys. You won't get a drastic change in performance using either one. If I was you I'd go with what works. If the NGK's are running well then stay with them. Otherwise use what the manufacterer recommends.
 
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