Spark Plug Replacement for Mercury 115 4 stroke EFI

[Skyharbor]

I wanted to change out the plugs in my 2016 Mercury 115hp 4 stroke EFI engine today, but cannot find the same plugs that were installed in the engine, probably when engine was new. I am second owner. The plugs in there are NGK ZFR5F with about a 3/4" threaded shaft. West Marine and another aftermarket outfit says they don't have them or they are unavailable. Any ideas of a cross ref for say, Champions or other good brand? I see some of these online but they seem to be for cars.

 

[Faztbullet]

Spark plug doesnt know if in car/truck/outboard. As long as it is same recommended type and number it will work.

https://www.amazon.com/NGK-V-Power-MITSUBISHI-GALANT-2003-2003/dp/B07VHY878B/ref=sr_1_1_sspa?keywords=NGK+ZFR5F&qid=1639490223&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExMVdONDVNMzlYMktGJmVuY3J5cHRlZElkPUEwMjQwNTU4VTEzUUJGTVhIOTZBJmVuY3J5cHRlZEFkSWQ9QTA4NDk2NjdETzM4MzVNNjdMQlUmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

 

[Skyharbor]

Spark plug doesnt know if in car/truck/outboard. As long as it is same recommended type and number it will work.

https://www.amazon.com/NGK-V-Power-MITSUBISHI-GALANT-2003-2003/dp/B07VHY878B/ref=sr_1_1_sspa?keywords=NGK+ZFR5F&qid=1639490223&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExMVdONDVNMzlYMktGJmVuY3J5cHRlZElkPUEwMjQwNTU4VTEzUUJGTVhIOTZBJmVuY3J5cHRlZEFkSWQ9QTA4NDk2NjdETzM4MzVNNjdMQlUmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

Thank you very much. I did see this from Amazon, but the length of the threaded shank looked shorter than mine. Mine is about 3/4". As long as the plug is ZFR5F, is it automatically long enough? I also heard from NGK who verified what I read here, NOT to use anti seize lube on their plugs. I never heard this before, but glad I know now. I will have to clean off the threads to be sure none from last year remain, or would it have burned off? Thanks for writing. Happy Holidays to you.

 

[flyingscott]

On Amazon they sometimes use a stock generic photo of the item. As long as the #s are thew same you are good.

 

[Skyharbor]

thanks, I was hoping that was the case. Will see when they come!! Appreciate your time to reply.

 

[QBhoy]

Hi. These are widely available and used in lots of applications. There are also iridium versions too, that aren’t too much more expensive. I’ve changed mine twice a season since owning this engine a few years ago. Amazing engines, if you don’t know already.

 

[Skyharbor]

Hi. These are widely available and used in lots of applications. There are also iridium versions too, that aren’t too much more expensive. I’ve changed mine twice a season since owning this engine a few years ago. Amazing engines, if you don’t know already.

Thanks for writing. I finally found them at Monarch and are in the mail now. Yes, I am pleased with my Merc. Thanks for your help. George