NGK plugs

I

INDABA

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Can anybody tell me the difference between these two NGK plugs?? BUHXW-2 and BUHW-1

I tried to look on the NGK site but couldn`t identify the - 1and 2
Or alternatively , can somebody direct me to a chart that I ca identify from??
Many thanks
 
I

INDABA

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Re: NGK plugs

These two plugs are "surface gap"
Can somebody explain the reason for surface gap lugs??
Can a surface gap plug be replaced by an ordirary type, IE, one with the electrode protruding??
 
5150abf

5150abf

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Re: NGK plugs

I have found that the engineers that built your engine are way smarter than me so I always use the plug they say to use.

Find out what plug is suppose to go in it and replace it with that.

What engine are we dealing with here, that would help get your question answered maybe.
 
Sea Rider

Sea Rider

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Re: NGK plugs

If by surface gap, you mean the plug that has only a central electrode with no lateral pin, those are for racing or cruising with engines at constant 3/4 to wot most of the time, will foul and run dead at constant idle/trolling speeds.

Happy Boating
 
I

INDABA

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Re: NGK plugs

All I want to know is the DIFFERENCEM between these two plugs. Engine and applications don`t matter, JUST the difference
 
Frank Acampora

Frank Acampora

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Re: NGK plugs

You also asked the reason for surface gap plugs----Plugs such as these have no center insulator exposed to combustion heat and have the full length of center insulator cooled by the head. Thus: the plug is dead cold and in applications where the engine runs very hot (like some outboards) they help to prevent pre-ignition and detonation. As for the difference between the two, I can not say, only speculate: Sometimes the only real difference is in the length of the threaded portion due to the manufacturer making a thicker or thinner head. Some MAY have a resistor built in. However, since all my engines use BUHW or BUHX, I never looked into any differences.

Can you replace them with side electrode plugs? ---Yes, but it is not a good idea. I have seen engines with holes melted in the pistons from use of incorrect heat range plugs.
 
V153

V153

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Re: NGK plugs

Been running NGK Irridium plugs in my Evinrude 90 for a few years now. Specifically BR7HIX part#7067. Like em a lot. Honestly believe they help the motor idle smoother through no wake zones etc. No more of that occasional wheeze or sputter. Lil pricey but worth it imo.
 
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Sprky

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Re: NGK plugs

V153 said:
Been running NGK Irridium plugs in my Evinrude 90 for a few years now. Specifically BR7HIX part#7067. Like em a lot. Honestly believe they help the motor idle smoother through no wake zones etc. No more of that occasional wheeze or sputter. Lil pricey but worth it imo.
Click to expand...

Someone call the post police............... that is not the plug that the manufacturer calls for in that application! Your gonna damage the ignition, melt a piston, destroy a muffler bearing or worse, hurt your "smart tabs". :rolleyes:

I like em too. "Fine wire" plugs work great in many applications.
 
I

INDABA

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Re: NGK plugs

So far I have had answers to everything except what I asked for

Can anybody tell me the difference between the two plugs at the start of the thread??
 
I

INDABA

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Re: NGK plugs

My interpration of the NGK chart, seems the numbers at the end of the letters is the gap??
Number 1 being 10thou and 2 being 20thou??
Can somebody verify or discount this??
 
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Sprky

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Re: NGK plugs

Some plugs run an internal "booster gap" it could be a reference to that.
 
Sea Rider

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Re: NGK plugs

If wanting first hand tech specs, write NGK as have done in some occasions to inquire plugs differences, other than that, you will be lost rowing in middle ocean...

Happy Boating
 
V153

V153

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Re: NGK plugs

To the best of my knowledge the # on the plug indicates heat range. And if I'm not mistaken the lower the # the hotter the plug.
 
Sea Rider

Sea Rider

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Re: NGK plugs

Generally a number inside the letters is reffered to as heat range number, but if number is at the end is reffered to plug factory gapped, would it be possible to be 10 and 20 respectively instead of 1 & 2 ending? Seems somebofy ate the 0 ending for both...

Happy Boating
 
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