Best spark plug?
 

Guys , the other day I bought a set of NGK spark plugs and installed’em on my 150 Ocean Runner, I adjusted the gap at .035 as recommended and went to the lake for a spin. The motor ran at the same top speed but it sounded a bit rough at idle.

With your vast experience with OB’s, what spark plug has performed best for you guys?

Thanks

Joe

Best spark plug?
 

Guys , the other day I bought a set of NGK spark plugs and installed’em on my 150 Ocean Runner, I adjusted the gap at .035 as recommended and went to the lake for a spin. The motor ran at the same top speed but it sounded a bit rough at idle.

With your vast experience with OB’s, what spark plug has performed best for you guys?

Thanks

Joe

Re: Best spark plug?
 

It depends on the make of the engine is my opinion. JOHNNY-RUDES like there CHAMPIONS and your imports seem to run best on NGK's. MERCURY's are a toss up in my opinion.

Re: Best spark plug?
 

It depends on the make of the engine is my opinion. JOHNNY-RUDES like there CHAMPIONS and your imports seem to run best on NGK's. MERCURY's are a toss up in my opinion.

Re: Best spark plug?
 

Like Ferm, I always heard to stick with Champion in Johnson/Evinrude.

Re: Best spark plug?
 

Like Ferm, I always heard to stick with Champion in Johnson/Evinrude.

Re: Best spark plug?
 

i hate Champion plugs, they break easy, & rust quickly, but I haven't seen a John-Rude yet that didn't run better with them than other brands. I run NGK on everything but John-Rudes

Re: Best spark plug?
 

i hate Champion plugs, they break easy, & rust quickly, but I haven't seen a John-Rude yet that didn't run better with them than other brands. I run NGK on everything but John-Rudes

Re: Best spark plug?
 

NGK should be called NFG They are Junk plugs ran them in my race ski's crap went to Champion ran better but then went to Denso Iridium Plugs BEST Plugs i've ever run, Now I run them in everything but they are $11.99 to 21.99 each depending on app.

http://www.densoiridium.com/index.php

Re: Best spark plug?
 

NGK should be called NFG They are Junk plugs ran them in my race ski's crap went to Champion ran better but then went to Denso Iridium Plugs BEST Plugs i've ever run, Now I run them in everything but they are $11.99 to 21.99 each depending on app.

http://www.densoiridium.com/index.php