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Honda bf250 spark plugs

Old 01-30-2020, 02:38 PM
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Default Honda bf250 spark plugs

Hi,
I am soon going to have my bf250 serviced for 100 hrs. I have read the manual in which they recommend ZFR6K-11E from NGK while on another, one page manual called "owners maintenance information" they recommend IZFR6K11 instead. Both pdfs were from the official Honda marine website. I have absolutely no idea what all that means and I only have a basic knowledge when it comes to mechanics and motors in general.
And so I would really appreciate if you enlighten me about this whole spark plug thing, and which one of the above would be a better option.
Thank you
Old 01-30-2020, 02:52 PM
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A google will probably reveal the plug differences, but, going by the numbers given, they are the same plug, but one has a built in "difference" like say, a suppressor.
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Old 01-30-2020, 03:34 PM
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My thought is the second plug is Iridium. I think Iridium means "get out more money"
Old 01-30-2020, 03:52 PM
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Pretty sure the Honda forum consensus is to go with the iridium plugs.
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Old 01-30-2020, 06:57 PM
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Yes possibly, I didn't notice the "I" at the start, I was looking at the E
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Old 01-30-2020, 07:24 PM
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According to the shop manual for the newest D series engines, the standard plug is ZFR6K-11E. The recommended iridium tipped plug is the IZFR6K-11E.

The more expensive iridium tipped plugs will last longer and may provide a little better fuel economy and a smoother idle.
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Old 01-31-2020, 01:44 AM
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Thank you for the answers.
But what does the E in the end mean? and are there any special marine spark plugs? I can remember reading about them somewhere. Or do I just buy the ones for car engines with that reference nr. ?
Old 01-31-2020, 01:58 AM
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Iridium will be better and last longer...but don't leave them unchecked longer. Remove them whenever it's time for maintenance. If left alone too long they will "freeze" in place and strip out the heads when removed. Be sure the threads get coated with anti seize when installed.
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Old 01-31-2020, 03:02 AM
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Originally Posted by Dendi9 View Post
Thank you for the answers.
But what does the E in the end mean? and are there any special marine spark plugs? I can remember reading about them somewhere. Or do I just buy the ones for car engines with that reference nr. ?
I don't think it means anything to the consumer.
Old 02-01-2020, 04:29 AM
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I was looking at this link, I am from germany so the link is in german. What do you think? looks like the right stuff!?
https://www.ebay.de/itm/6x-ORIGINAL-...3fbe%7Ciid%3A1
Old 02-01-2020, 08:44 AM
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In English.......this is not that bad, $22 for six. I remember my buddy paying $18 each to have them installed in his outboard by a mechanic a few years ago.

https://www.ebay.com/itm/6Pcs-OEM-Sp...0a6d8b9caa924b
Old 02-01-2020, 12:35 PM
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Originally Posted by Dendi9 View Post
Thank you for the answers.
But what does the E in the end mean? and are there any special marine spark plugs? I can remember reading about them somewhere. Or do I just buy the ones for car engines with that reference nr. ?
I googled an NGK site (in German) and the E means " Spazaller Widerstand" or close to that, I didn't copy and paste, just tried to remember the spelling.
Old 02-01-2020, 01:05 PM
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Couldn't help myself, I translated "widerstand" into English, and it means resistance, so I guess it has some sort of suppressor built in.

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