Boats for Sale
Advice
NGK Spark Plugs
(representative photo)
(representative photo)
(representative photo)
(representative photo)
(representative photo)
(representative photo)
Representative Photo
View Larger Photos
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:
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:
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.
This product ships in 1 business day.
Add to Cart and enter your Postal Code to determine the shipping charges.
Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies
