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NGK Spark Plugs
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Choosing the right spark plug NGK Spark Plugs Tech Video
Here is a great video to help you determine what spark plug is best for your application.... read more
Video Transcript
How do I choose the right spark plug? When choosing a spark plug, there are some things to consider if the applications has not been modified then referencing the NGK part finder or printed catalog will suffice. If the application has been modified, then there are other factors to consider: thread diameter, thread reach, gasket or tapered seat, heat range, projection and electrode material will all need to be taken into consideration.
Modification such as the addition nitrous oxide, forced induction or modified compression ratio will require an alternative spark plug selection.
Video Transcript
How do I choose the right spark plug? When choosing a spark plug, there are some things to consider if the applications has not been modified then referencing the NGK part finder or printed catalog will suffice. If the application has been modified, then there are other factors to consider: thread diameter, thread reach, gasket or tapered seat, heat range, projection and electrode material will all need to be taken into consideration.
Modification such as the addition nitrous oxide, forced induction or modified compression ratio will require an alternative spark plug selection.
Changing spark plugs Performance Improvement NGK Spark Plugs Tech Video
Here is a great video on answering the question about how much preformance improvement can I get from using better spark plugs.... read more
Video Transcript
How much of a performance improvement can I expect from changing spark plugs? Installing new spark plugs will not increase total engine output. Replacing worn spark plugs will only result in the smallest power gains typically about 1 or 2 % of total engine output. Modern vehicles that are computer controlled may not even see the 1 or 2 % increase as a feature more powerful ignition in systems that can compensate for the power loss of this minimal percentage.
The most important thing that changes when new spark plugs are installed is overall engine efficiency.
Video Transcript
How much of a performance improvement can I expect from changing spark plugs? Installing new spark plugs will not increase total engine output. Replacing worn spark plugs will only result in the smallest power gains typically about 1 or 2 % of total engine output. Modern vehicles that are computer controlled may not even see the 1 or 2 % increase as a feature more powerful ignition in systems that can compensate for the power loss of this minimal percentage.
The most important thing that changes when new spark plugs are installed is overall engine efficiency.
Spark Plug Gap Opening & Closing
Here is a great video that talks about the gap opening and closing.... read more
Video Transcript
What is the maximum I can open or close the gap? A spark plug should not be open or closed more than eight thousands of an inch (.008”) from the original gap size out of the box. For example, NGK TR5 will come out of the box set at forty thousand of an inch (.040’). The widest we can open the gap is forty eight thousands of an inch (.048”), the narrowest we can close the gap is thirty two thousands of an inch (.032”). Adjusting the gap beyond this will result in poor performance due to misaligned electrodes and cause increased stress on the ground electrode as well that could lead to failure.
Video Transcript
What is the maximum I can open or close the gap? A spark plug should not be open or closed more than eight thousands of an inch (.008”) from the original gap size out of the box. For example, NGK TR5 will come out of the box set at forty thousand of an inch (.040’). The widest we can open the gap is forty eight thousands of an inch (.048”), the narrowest we can close the gap is thirty two thousands of an inch (.032”). Adjusting the gap beyond this will result in poor performance due to misaligned electrodes and cause increased stress on the ground electrode as well that could lead to failure.
NGK Spark Plug Numbers & Letters: What Do They Mean? (video) Video
Here is a great video that describes what the letters and numbers for a spark plug indicate.... read more
Video Transcript
What do the numbers and letters in a part number represent? Each part number is made up of a combination of letters and numbers. These are used to identify characteristics of the spark plug. With these characters we can find out what type of spark plug, thread size, thread reach, heat range and other unique features of that part number. For example, the part number YR5GP can be broken down as follows:
Y – represents 14mm thread diameter, .460” thread reach, tapered seat, non-projected
R – represents resistor
5 – represents heat range
GP – represents fine wire platinum center electrode
A guide is available in our NGK printed catalogs that will help you break these part number down.
Video Transcript
What do the numbers and letters in a part number represent? Each part number is made up of a combination of letters and numbers. These are used to identify characteristics of the spark plug. With these characters we can find out what type of spark plug, thread size, thread reach, heat range and other unique features of that part number. For example, the part number YR5GP can be broken down as follows:
Y – represents 14mm thread diameter, .460” thread reach, tapered seat, non-projected
R – represents resistor
5 – represents heat range
GP – represents fine wire platinum center electrode
A guide is available in our NGK printed catalogs that will help you break these part number down.
Q:
NGK website shows the BUZHW as the plug for my 1987 Mercury 115. If the only difference between that plug and the BUHW is the resistor, can the BUHW be used instead?
A:
No it cannot, you will need to go with what is called for your motor.
Q:
I've got a 1979 70 hp Mariner 2-stroke motor, will the BUHW plugs work?
A:
Yes BUHW will work for your motor.
Q:
I have a mercury 500 50 hp 3 cyl motor s/n 4707764, will the BUHW plugs work? can you tell me what year the motor is?
A:
It is a 1977. Yes BUHW will work for that motor.
Q:
Will these fit a 1975 mercury 1150 115hp inline 6?
A:
Yes this will fit your motor.
Q:
I have a 1992 70 H.P. Nissan motor. Will this plug work in my motor?
A:
According to NGK's spark plug finder you need part number B8HS-10.
Q:
I have a 2007 mercury 225 verado. Are these the right plugs?
A:
No, these are not the plugs NGK recommends for you. The spark Plugs for: "2011-2004 MERCURY 225 Verado 225 hp / 2.6L 6-cyl. 4-stroke, Supercharged" are: Part Number ILFR6G-E or Stock Number 4212.
Q:
Looking for the right plugs for a 2013 mercury 150 4 strke?
A:
NGK does not have a spark plug for the 2013 Mercury engines.
Q:
Plugs fit 1990 Johnson 150?
A:
BZ7HS-10 is the part number for a 150hp, 1990, V6 Johnson.
Q:
Will these work for 2007-08 Mercury optimax 150hp dfi?
A:
We will need serial number to confirm the spark plug for your motor.
Q:
Will this plug fit my 2009 Mercury optimax 150?
A:
We will need to know the serial number to confirm spark plug.
Q:
I have a blue band mercury 700 what plugs do i need?
A:
We will need to know the year of your 70 HP, 700 motor or the serial number to match up spark plugs.
Q:
Which is the best spark plug to purchase for a 2005 90 HP Yamaha 2-stroke outboard engine and are the plugs gapped properly?
A:
This is the correct spark plug for your motor. The gap is .039 and is gapped properly for your motor. This is the recommendation directly from NGK.
Q:
What's the difference between BR7HS and BR7HS-10?
A:
There really is no difference between the two apart from packaging details.
A:
I believe it's the gapping. My Yamaha V150 outboard motor requires the BR7HS-10 because the gapping on the plug is .039. My boat motor requires .035 to .039. The BR7HS has a gapping of .026 I believe. I think as long as the gapping of the plug is within range of the requirements of your motor you should be OK.
Q:
Will these plugs work for a 1977 johnson 2 stroke 9.9?
A:
BR7HS is the correct NGK spark plug for your motor.
Q:
I've got a 1998 Yamaha XL 1200 jet ski is there any benefit of putting in a high-performance plug at all?
A:
Iridium and plantinum plug are typically chosen for spark plug longevity.
Q:
Will this ngk plugs work 1995 johnson 150 hp?
A:
What is pulled up in NGK's finder is part number BPZ8HS-10.
Q:
What is the gap setting on a BUHX plug for use in an 85hp Force Outboard?
A:
This spark plug has a non-adjustable gap setting of 30,000.
Q:
My engine calls for a 43T plug will these work on my 228 mercruiser? The tips on the plugs i pulled out are extended her out than the yr5 that has a shorter tip?
A:
Well the photos are representative photos from NGK. According to NGK's spark plug finder the YR5 is called for the 228 engine. So this is the correct one for your engine.
Q:
Is br6hs equivalent with same gap?
A:
They both have a .03 gap, but we cannot assure that they are equivalent as they are called for different models. Best thing to do is identify the NGK recommended spark plug by motor. If you need assistance give us a call at 1-800-914-1123.
Q:
Is this spark plug a cross reference to Champion QC12PEP?
A:
We don't exactly have a cross reference sheet between the manufacturer's, but that doesn't look like it cross references. The way we can match it up is by giving us the make, model, year of the motor. If you have further questions you can call us at 1-800-914-1123.
Q:
Can you tell me if one brand plug is better than the other -champion or ngk?
A:
We don't have a recommendation over another. Both offer similar performance. If you have further questions contact us at the number at the top of the page.
Q:
Gap setting for mercury outboard?
A:
Gap on this spark plug is 0.040. If you need assistance finding the right plug give us a call at 1-800-914-1123.
Q:
Is this the correct spark plug for my 3.0l mercruiser year 2001?
A:
No, as long as your serial number is after 0L010042 you need BPR6EFS. If it is to 0F353100 you need BR6FS.
Q:
Is there a platinum spark plug available for a 1992 50 horse Mercury 2 stroke?
A:
No there is not, only the standard plug.
Q:
Are the se the same as ngk bpz8hn10?
A:
No it is not. Here is the part number you requested: http://www.iboats.com/BPZ8HN10-NGK/dm/view_id.66838
Q:
What is the gap for the yamaha z150 hpdi?
A:
This is a multiply ground electrode application, so NGK recommends that this not be used in a plug gap setting.
Q:
Is the BKR6EKU the plug I should use as the replacement for an OEM of BKR6E?
A:
It appears the BKR6E is still an active part number, we just don't have it listed. We can only match up the spark plug by knowing your engine application. Contact us at the number at the top of the page for further assistance.
Q:
I have a 2001 Yamaha VZ150TLRZ Outboard (s/n 6J9L800717) I am finding different answers for the Spark Plugs. I am seeing both the NGK BKR6EKU and NGK BKR7EKU. Can you tell me which is the right plug?
A:
The correct one for your application would be the BKR6EKU.
Q:
Suzuki 115 hp spark plug NGK BR8HCS-10 in motor. about 2010 model.?
A:
NGK lists the BKR6ES as the replacement for a 115 HP, 2010 Suzuki.
Q:
Can I replace the BPR6FS with an E3 40?
A:
E3 Spark Plugs has no cross reference for the BPR6FS, so no you cannot replace it with this NGK plug.
Q:
Spark plugs for a 1996 150hp Evinrude and gap ??
A:
BPZ8HS-10 is the spark plug you need and the gap is .03.
Q:
What is the gap for plugs NGK BPS 6FS??
A:
We do not pull up that part number. We will need motor info to confirm.
Q:
Will this plug work on my 1995 Volvo Penta 5.0 Fi PHUECE? The plugs in the engine are Autolite APP 104. Wholesale Marine lists NGK -BPR-6EFS. What's the difference between the two?.?
A:
According to NGK the 5.0 FI uses spark plug TR5.
Q:
I have a spark that says ngk bu8h I Need only 3 it shoes a box of 25 can a nother plug work?
A:
We offer it individually: http://www.iboats.com/NGK-BU8H-Spark-Plug/dm/view_id.167046
Q:
Is the BPR6FS the correct plug for a 1979 305 chevy marine chris craft inboard engine?
A:
We do not have original information to confirm for that motor. You will need to check locally.
Q:
What is the correct size plug for 1993 Evinrude 70 hp?
A:
You need NGK number BZ7HS-10.
Q:
Is there a diff between the "n" or "s" in the PN. Thanks?
A:
We do not pull up a BPR6FN or anything so not sure exactly what you are referring to. We can confirm spark plug by knowing your motor.
Q:
Does the gap come already set?
A:
NGK factory sets the gap to a preselected setting, however this may not be the right gap for your particular engine. It is always best to check the gap against the engine manufacturer's specifications.
Q:
Dont you sell these sparkplug individually. I only need 4.?
A:
Yes we do: http://www.iboats.com/Spark-Plug-BUHW-2-NGK/dm/view_id.167049
Q:
Do these plugs come pre gapped or do I have to set the gap myself?
A:
NGK factory will set the gap to a pre-selected setting. It is always best to check the gap against the engine manufacturer's specifications.
Q:
Applacation for these plugs?
A:
These work on many different applications. Easiest thing to do is give us your application and we can match up spark plug.
Q:
What is gap when used in 260hp 5.7 mercruiser?
A:
You need to contact a Mercury mechanic for that information.
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