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
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
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
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
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:
There really is no difference between the two apart from packaging details.
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.
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.
Is this spark plug a cross reference to Champion QC12PEP?
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.
Is the BKR6EKU the plug I should use as the replacement for an OEM of BKR6E?
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.
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.