Re: Best spark plug?
 

Evinrude, Johnson-CHAMPION

Re: Best spark plug?
 

Evinrude, Johnson-CHAMPION

Re: Best spark plug?
 

I use those in my 1800cc Honda Motorcycle. They're great. Been in for over 60 thousand miles.

Re: Best spark plug?
 

I use those in my 1800cc Honda Motorcycle. They're great. Been in for over 60 thousand miles.

Re: Best spark plug?
 

MY MERCURY REPAIR MANUAL RECOMMENDS THE NGK'S SO THATS WHAT I RUN. SHE SEEMS TO RUN FINE.

Re: Best spark plug?
 

MY MERCURY REPAIR MANUAL RECOMMENDS THE NGK'S SO THATS WHAT I RUN. SHE SEEMS TO RUN FINE.

Re: Best spark plug?
 

every one has got high milage plugs out now, some of them are very expensive(opti plugs are $25+ each). All these plugs work great as long as the engine is in proper tune, gas foul a premium plug and you'll never get it to fire correctly again, some engineer earned his money making sure these plugs would foul under the wrong conditions. I still run regular plugs unless there is no alternate to the premium plug, I can buy 8 regular plugs for what soome premium plugs cost apiece

Re: Best spark plug?
 

every one has got high milage plugs out now, some of them are very expensive(opti plugs are $25+ each). All these plugs work great as long as the engine is in proper tune, gas foul a premium plug and you'll never get it to fire correctly again, some engineer earned his money making sure these plugs would foul under the wrong conditions. I still run regular plugs unless there is no alternate to the premium plug, I can buy 8 regular plugs for what soome premium plugs cost apiece

Re: Best spark plug?
 

yeah but the standard plugs don't offer as good of fuel mileage as the high perf. ones do. Plus heat doesn't bother the high end plugs. I learned Platinum plugs and racing fuel don't match well. My old Camaro use to eat them a set every 1500 miles or so. I put the new Iridium Plugs in and never another plug issue. Had the same problem in my Corvette due to 90's Vette's run hot by design at around 230* so i had issues with standard and platinum plugs getting out of heat range but the Iridium plugs fixed the problem. GM told me to use them in the Vette and they were right.

Re: Best spark plug?
 

yeah but the standard plugs don't offer as good of fuel mileage as the high perf. ones do. Plus heat doesn't bother the high end plugs. I learned Platinum plugs and racing fuel don't match well. My old Camaro use to eat them a set every 1500 miles or so. I put the new Iridium Plugs in and never another plug issue. Had the same problem in my Corvette due to 90's Vette's run hot by design at around 230* so i had issues with standard and platinum plugs getting out of heat range but the Iridium plugs fixed the problem. GM told me to use them in the Vette and they were right.