Brisk RR15IRY-7, gap size is 0.7 mm, Brisk GOR15YTE-3, gap size is 1.3mm NGK BKR6E-11, gap size is 1.1mm, Denso T16EPR-U15, gap size is 1.5mm, Champion RC10YC4, gap size is 1.0mm). As such the electrode gap may need adjustment, and it is always best to quickly consult you owner’s manual (Please refer to Electrode Gap Adjustment). Image Part No. ��As the spark always follow the path of least resistance, spark gap is generally the closest point between the spark plug center electrode and the spark plug ground electrode which is sometimes formed by the spark plug shell itself. With its clear commitment to delivering the highest quality and continuously raising the bar, NGK Spark Plugs is the obvious brand of choice for an array of vehicle manufacturers. Maybe. RS14YC6), Spark Plug Gap - understanding the basics��, Spark plug gap is where spark plug spark discharge is designed to take place. While every precaution has been taken in the compilation of this information, NGK Spark Plug (Australia) Pty Ltd takes no responsibility for inaccuracies that may occur within it. The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008" in either direction. NGK as a company tries to stay clear of saying that a racing spark plug (or ANY spark plug) will give you large gains in horsepower. An incorrect electrode gap may affect engine performance as the spark magnitude may be insufficient to. NGK have over 80 years of experience in spark plug manufacturing and we are a world leader in spark plug technology. we have found that the surface-gap plugs, while lasting longer, seem to have a slight performance hit over the standard plugs. Spark Plugs Technologies. Hotter climate, cooler plug and higher octane, BTW with NGK plugs the lower the number, the hotter the plug. TollFree 1 800 661 9438 www.transcanimports.com Elec -44 NGK SPARK PLUGS - MOTORCYCLE APPLICATIONS cc Model Year Regular Premium Plug Gap cc Model Year Regular Premium Plug Gap 175 CB175 69-73 DR8HS --- 0.028 175 CL175 68-73 DR8HS --- 0.028 175 MR175 75-77 BR8ES BR8EIX 0.028 Author admin Posted on August 13, 2019 March 9, 2020 Format Image Categories Charts, General Tips Tags honda spark plug, jet ski spark plugs, kawasaki spark plug, seadoo spark plug, yamaha spark plug One thought on “Jet Ski NGK Spark Plug Chart” If you know if any others, add a comment below and we'll add them to the list. Spark Plug specification is subject to change without notice. An incorrect electrode gap may affect engine performance as the spark magnitude may be insufficient to ensure complete combustion of the air-fuel mixture. It is thus vital that you get hold of the NGK spark plug gap size chart and adhere to the same. By adjusting this distance you are sad to be ‘gapping your spark plugs’. ��This is calculated as a % of misfire. This spark plug has corrugated ribs, triple gasket seal, copper core for more effective heat removal, a 21 mm (13/16 inches) hex size, and 0.9 mm (0.035 inches) gap. Stock No. I tried BP7's but they wanted to foul. Product linkage to vehicles or equipment from this publication are considered under normal conditions of use, fitted by a professional. Spark Plug Gap setting is important for proper engine operation. Arctic Cat ATV Spark Plugs View Cart Empty Cart Check Out : NGK Spark Plugs . ��The "-T" indicate LGS style spark plug with a��Tighter gap��than standard LGS style spark plug and should be used on applications where the recommended gap setting is less than .032"., Brisk Extra Turbo Spark Plugs and some others. The electrode gap of a spark plug dictates the spark magnitude. Useful hint: print the image and hang it in your garage! For your engine to perform at optimum, the spark plugs in play should have the necessary spacing. While plugs are pre-gapped from the factory, the gap may need to be adjusted for the vehicle that the spark plug … An incorrect electrode gap may affect engine performance as the spark magnitude may be insufficient to ensure complete combustion of the air-fuel mixture. Choose a brand from the list below then locate the spark plug for your specific saw by model number. Plug images are located on the opposite page. You may also find the NGK spark plug code helpful. These spark plugs have laser welded centre electrodes using the precious metals iridium or platinum. For your engine to perform at optimum, the spark plugs in play should have the necessary spacing. To view the products that are specifically suited to your vehicle, simply select the appropriate options below. Please view the application guide below. ��Modern engines often turn the check engine light on with a misfire code (generally P03xx) with corresponding cylinder number when only as little as 10% misfire occurs, which is far before anyone will even feel that something is wrong or even think that a misfire is occuring. RC10YC4)��5 = 1.3mm (e.g. How to Change Spark Plugs - Spark plug Gap setting and Gap cross reference chart. NGK Spark Plug Specification Chart 60 Spark plug charts are sorted by thread size, thread reach, hex size. Image Racing Spark Plugs 14mm Spark Plugs (cont.) pgr7a 3200 n/a - igr7a 6687 plfr6a-11 7654 n/a - ilfr6t11 4904 pltr6a-10g 3587 n/a - iltr6a-13g * 3789 plzfr6a-11s 5987 n/a - ilzfr6d11 1208 plzkbr7a-g (disc'd) 5843 n/a - ilzkbr7b8dg 95770 Do NGK Iridium plugs need to be gapped? ��, Sometimes customers wonder, why there is so many different spark plug gap firing configurations. 25 1969 - 1976 J4C .030 25 1977 QL77JC4 or QL82C .030 20, 25, 28, 30 1978 - 2001 QL77JC4 or L78V or QL82C .030 25, 30 2003 & newer QL77JC4 .030 25 Commercial 1981 - 2001 QL16V or L16V Surface Gap DO I NEED TO SET THE “GAP” WHEN INSTALLING A NEW SET OF PLUGS? ��High compression engines and engines with forced induction have higher combustion chamber pressures at time of spark discharge. Part numbering for Brisk, NGK and Denso spark plugs is reasonably logical with the trailing digits transposing directly into size in mm. 4) Engine ignition timing advance - the closer to the engine TDC (Top Dead Center) the spark occurs, the higher is the A/F mixture pressure it has to fire, and the harder for spark it is. Model: Year: Plug Gap: Part # Your Price : 500 4X4: 99-03.028: NGKCR6E: 4.30: Quantity: Add To Cart : 500 Auto 4X4: 01-02.028: NGKCR6E: 4.30: Quantity: How to Change Spark Plugs - Spark plug Gap setting and Gap cross reference chart. For Champion spark plugs it is a little less logical and is as listed below:��, 4 = 1.0mm (e.g. 6) Type of Ignition system - magneto, CD (Capacitor Discharge), or Inductive. ��The like to be "experts" often say that there is no difference in spark plugs, and that the mixture either gets ignited or not. A variety of techniques are used to adjust electrode gaps. There are three spark plug thread sizes currently being used in motorcycles and ATVs. 2020 Spark Plugs, Development Trends Of Spark Plug Dimensions, Spark Plug Suppression Of Quenching Effect, Spark Plug Tightening Torque During Installation, turbo, supercharged, nitrous applications, different spark plug gap firing configurations, Musi Racing Opens 2020 Season With Victory At U.S. Street Nationals, BRISK USA SPARK PLUG CROSS REFERENCE TABLE. platinum upgrade stock no. Almost each and every spark plug comes in different HEX size. The NGK BPR6ES is a spark plug with an alumina ceramic insulator and nickel made center and ground electrode.. Think of a worn out spark plug gap like an old leaky water hose that requires more water pressure, and is like a restricting the flow at the end with your finger. In the case of engine power output enhancement by means of additional modifications it is suitable to contact a producer's representative. NGK has been developing spark plugs for every type of automotive engine, plus motorcycles, marine, horticultural, plant and many others since the 1930s. I have been running NGK BP6ES with a .30 gap plugs in my carbuerated 2.7 for a few years with great results. ��Some applications such as ProMod turbo cars using M1 fuel frequently run a spark plug gap as small as .012", even though they are equipped with some of the highest output ignition systems providing in excess of 60,000 Volts high current and high mJ power output. ��Even standard vehicle Modern OBD-II (On Board Diagnostic) engines can determine from a simple crankshaft position sensor the angular speed of the crankshaft. View full size version of NGK spark plug numbering chart.. View full size version of NGK performance plug numbering chart.. View full size version of NGK premium plug numbering chart. ��Higher fuel concentration has the same effect (lower A/F ratio). The answer to this question is yes. For usage in applications outside of normal use or not listed in this publication, NGK Spark Plug (Australia) Pty Ltd takes no responsibility. ��Also, the spark plug gap should never exceed .055" unless pre-set by the manufacturer. An appropriate method and tool should be used for gap adjustment although it has come to our attention that a variety of improper methods are used that lead to implications. Correct way to check, set and adjust your spark plug gap. ��On a conventional spark plug, it is the area between the center and the ground electrode. Please refer to our application listings for full details. ensure complete combustion of the air-fuel mixture. ��More pressure is required form the leaky hose, because more water leaks out at other places than the hose end. ��, Generally the applications with low cylinder pressures (low compression ratio) running lean A/F (Air/Fuel) mixtures have large recommended gap (around .050"), and applications with high cylinder pressures (high compression, forced induction - turbo, supercharged, nitrous applications,...) require spark plug gap smaller than .032". ��Higher cylinder pressure requires higher voltage for the spark to occur. If your spark plug part number has no trailing digits then (for most part numbers) it will be preset to this specification. The NGK Spark Plug Chart Explains All. There always applies a principle that in the case of medium modifications of the power output it is suitable to use the spark plugs "colder" by 2 degrees than those forming its original equipment (e.g. ��The reason is, that in order to get the best possible performance, the spark plugs have to be carefully matched with the appropriate application and intended use. The electrode gap of a spark plug dictates the spark magnitude. ��On the other hand Inductive ignition systems generally provides longer spark duration... Vehicles produced in series (which are not additionally modified for engine power output enhancement), whose engines are properly adjusted and in good technical condition, can be equipped according to the current application tables. From passenger cars and bikes to Formula 1 and motorcycle racing, NGK Spark Plugs has established itself as a heavily relied upon original equipment manufacturer (OEM). Since the gap size has a direct affect on the spark plug's tip temperature and on the voltage necessary to ionize (light) the air/fuel mixture, careful attention is required. NGK Spark Plug Numbering Systems Wondering what the numbers and letters on an NGK spark plug mean? In some rare cases however, a specific electrode gap may be required for some vehicles which is not commonly manufactured. ngk spark plug upgrade chart original plug stock no. ��Mounted on the crankshaft is a trigger wheel that has many teeth, as the crankshaft spins, this wheel inducts a pulse when each tooth passes the sensor. iridium upgrade stock no. Spark Plug Gap cross reference chart - metric to standard … “B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size. If your preferred gap size isn't listed, ordering the closest comparable measurement should work once adjusted. NGK do not recommend gap adjustment for precious metal spark plugs. Feel free to download this catalog for any information reference of Brisk Spark Plugs. ��CD ignitions have very fast Voltage rise (short rise time) and therefore they also work very well with spark plugs that have high capacitance, such a spark plugs with multiple gaps and/or surface discharge spark plugs. ��The force should be applied ONLY on the spark ��plug ground electrode strap moving it closer or further away from the spark plug center electrode. The electrode gap of a spark plug dictates the spark magnitude. 5) Engine load and intended use - when engine is under load, the pressures in the combustion chamber is higher as there is more air aspirated, making it harder for spark to occur. spark plug. ��High RPM applications also shorten the ignition coil saturation (on time or DWEL) resulting in less available energy. ��This robs available voltage at the spark plug gap, ��as it "leaks" through the low resistance carbon deposits to the ground, resulting in a weak spark. Since the gap size has a direct effect on the voltage necessary to jump the gap and ionize (light) the air-fuel mixture, careful attention is required. ��It is not uncommon to gain as much as 20 Hp just by replacing used spark plugs. NGK spark plugs are original equipment on many outboard motors and are excellent replacements for everyday engine maintenance. While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Hotter plugs are listed above the colder plugs. Horsepower Year Spark Plug Number (see notes 1 and 2) Gap (in.) ��However if one cylinder produces slightly less power, the time between the corresponding pulse is slightly increased. The BPR6ES spark plug manufactured by Japanese company NGK mainly for general-purpose engines … ��The dense A/F mixture is much harder for spark to penetrate, and require much higher voltage (pressure). If you need to change your Kawasaki's spark plugs but you're not sure of the size or if you want to upgrade your plugs to an iridium version for a longer-lasting plug, this is the guide for you.We've listed every Kwacker model we can find. The answer to this question is yes. RN16YC5)��6 = 1.5mm (e.g. For reference, see our spark plug gap chart below, this chart converts metric measurements to standard. While certain spark plugs are better suited to certain applications (and we’re happy to counsel you in the right direction) we try to tell people that are looking to “screw in” some cheap horsepower that, in most cases, spark plugs are not the answer. A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine. Hex refers to the socket or the diameter in the center of a spark plug which is used to turn the spark plug and screw it down or undo it. All applications, illustrations and technical information detailed on this site have been assembled based on the latest information available. If it is not available, please consult your owners manual, check under the hood of your vehicle, or contact your local dealer. The very most important rule when checking or adjusting spark plug gap is, to never pry, apply or exert any force on the spark plug center electrode, or center electrode ceramic insulator. The part number you have entered is unknown or incorrect. Most Brisk and other manufacturer sparkplugs are preset to around 0.75mm - 0.8mm. ��This can be caused for example by loss of insulating property of ceramic due to conductive carbon build up from the combustion process (spark plug fouling). Online Price. Any comparison charts of spark plugs are always for informative purposes only and they do not substitute the current application tables in full. The exception are for example spark plug part numbers with gap that does not need to be adjusted and can not be changed, such as��Brisk Premium Multi-spark plugs,��Brisk Premium LGS Spark Plugs, Brisk Premium LGS-T spark plugs,��Brisk Extra Turbo Spark Plugs��and��some others. THIS CROSS REFERENCE TABLE IS INFORMATIVE ONLY. With the aid of a feeler gauge and the following advice, this adjustment is certainly something that you can do yourself.. What are the conventional spark plug gap settings? Electrode Gap. With a huge and varied spark plug range and NGK's assurance that every product equals or surpasses the quality of the Original Equipment part it's no wonder NGK are considered the Number 1 spark plug choice for many applications. Checking and changing spark plugs is an essential step in routine small engine maintenance and when troubleshooting problems with your lawn mower, snow blower or other outdoor power equipment.Follow this 3-step guide for resources to walk you through the process or jump to the section. ��This is generally desired in applications with late model high output ignition coils and lower compression naturally aspirated engine applications where cylinder pressures are relatively low and easy for spark discharge to occur. we recommend ngk instead, and traditional electrode-gap rather than surface-gap plugs where possible. Finding the Spark Plug on Your Engine Use the Spark Plug Gap Chart to Find the Right … ... Thread Size: 14mm: Tip: Projected Tip: Type: ... Non-Resistor, Standard, Traditional Spark Plug, Compact Small Engine Plug: View More Info. These NGK spark plug charts explain how NGK's numbering system works. 2) Pressure in the combustion chamber at time of spark discharge - Depends on compression and aspiration of the engine. a change from 15 to 12). For the best engine and spark plug performance, ��the size, style and shape of the spark plug gap should correspond with many factors. The electrode gap is meticulously controlled when a spark plug is manufactured, and due to the very large selection of plugs, in most cases the electrode gap is set to suit the vehicle as recommended in our catalogue. ��The only case when the spark will travel longer path to the ground, is when the longer path is more conductive (provides less resistance). There are many different spark plug gap styles available, some with low gap capacitance, some with high gap capacitance, some with low ignition voltage requirement, some with high ignition voltage requirement, some with projected tip, some with retracted tip, some with fixed gap, some with adjustable spark plug gap, some with several parallel gaps, some with several gaps in series. ��They can not be further from the truth! 3) Type and concentration of the fuel - for example fuels with high alcohol content requires lower A/F ratio and smaller spark plug gaps. If the threaded portion is slightly longer, spark plug indexing washers can be used to obtain the desired spark plug reach. intro table of contents harley davidson spark plug fitment chart manufacturer model standard plug iridium plug electrode gap harley-davidson breakout ngk dcpr7e ngk dcpr7eix harley-davidson breakout (euro 4) ngk dcpr7e ngk dcpr7eix harley-davidson breakout pro street harley-davidson cvo road glide custom harley-davidson cvo softail convertible ngk dcpr8e ngk dcpr8eix harley … SPARK PLUG DESIGN Wide Gap BPR5ES-13 Three ground BCP6ET Extra projected and shielded ZFR6E-11 Twin ground BKR6EK Four Ground BKR6EQUP Precious metal IZFR6B 'Softer' Hot Type (e.g. ��, However running a large gap in high cylinder pressure application (which makes it very hard for spark to occur), will demand such a high voltage (electrical pressure) for spark to jump the spark plug gap, that the spark will find an easier way to the ground, possibly where the igniton wire is close to the ground (engine block etc...) or inside of distributor cap, inside of the ignition coil, on the outside of the spark plug (between the plug and the boot) etc... ��In either way the spark will not occur between the spark plug electrodes inside the combustion chamber, and engine misfire will occur. Note: This cross-reference is a guide only and may not be suitable for all vehicles. ��If every cylinder generates exactly the same amount of power, than the time between each pulse is in the same pattern. ��. Adjusting the Electrode Gap. Modified engines with higher compression or forced induction will typically require smaller electrode gap settings (to ensure ignitability in these denser air/fuel mixtures) as the voltage requirement at the electrode gap is increased due to higher combustion pressures. We have an extensive range of spark plugs, each with their own unique characteristics specifically engineered to its vehicle application and they are designed to suit a broad range of vehicles on Australian roads. We sell high quality NGK Spark Plugs for Stihl Equipment and other replacement parts online. Gapping and Indexing GAPPING. ��Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. Yamaha Outboard NGK Spark Plug Guide. ��That reason is why high power vehicles (1,000 horspower and more) often run a spark plug gap as small as .016". ��Used spark plugs are hard to fire as the gaps are worn out, and insulation properties of the ceramic is compromised by solid combustion deposits and old fuel saturation. In order for a spark plug to work as it should, the gap between the ground and centre electrodes needs to be perfectly calibrated. There can be a lot of power gained by using an optimal spark plug for given application, as well as installing a fresh set of spark plugs. After completing an application search and selecting a spark plug, the “vehicle information” section on the product detail page should display the proper gap setting for your engine. ��That means that there is higher voltage build up in the ignition system (ignition coil, distributor, ignition wires) prior to the spark discharge. To set the spark plug gap correctly, you need to use a spark plug gap tool.For reference, see our spark plug gap chart below, this chart converts metric measurements to standard. This operation requires enough experience. ��Some of them are: 1) Potential of the ignition system - Spark Voltage (sometimes explained as Voltage potential or electrical pressure) corresponds with the distance that spark can cross at given air pressure and enviroment (concentration of the A/F (Air/Fuel) mixture etc... between the spark plug gap (center electrode and ground electrode). Spark Plug Gap setting is important for proper engine operation. My wife and I are mod-restoring a 1988 Honda Hawk GT ... you can have faith that it actually will based on careful selection. To set the spark plug gap correctly, you need to use a��spark plug gap tool. I also use 87 octance fuel in a moderate climate which should be considered. After driving several miles and subsequent assessment of the insulator tip appearance it is possible to decide about the most suitable equipment. DUE TO DIFFERENCES IN DESIGN AND MATERIALS THE SPARK PLUGS OF VARIOUS MANUFACTURERS DO NOT HAVE EXACTLY THE SAME HEAT RANGE. It is thus vital that you get hold of the NGK spark plug gap size chart and adhere to the same. For many engines, there is a suitable spark plug in the NGK range. There are a lot of options out there, but in general, you need 14,16,18,21 mm sockets with both 12 and 6 point configuration. spark plug application and information evinrude/johnson 1952-2010 evinrude/johnson motors ship with champion spark plugs. compare NGK spark plugs with Champion, AC, Denso, Bosch, KLG and Auto-lite Spark plug comparison chart This site uses cookies to help us provide quality services. BR4ES) Small Thermal Conductivity Area Large Thermal Absorption Area Large Spark Plug Socket Size Chart. NGK Racing NGK Standard Part No. ��, Large spark plug gap setting demands higher voltage (electrical pressure) for spark to jump the large distance gap. NGK Spark Plugs. Do NGK Iridium plugs need to be gapped? Chainsaw & Cut-Off Saw Spark Plug Application Chart Use this Chainsaw Spark Plug Reference Chart to find the right spark plug for your gas powered chainsaw or cut-off saw. NGK offers spark plugs which guarantee reliable ignition in converted engines. Browse the chart to find the spark plug gap you need, then choose the corresponding model. NGK Spark Plugs USA. The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. ��If there are trailing numbers after the part number, then the gap should be specifically set as per the manufacturer's part code designation (e.g. When changing the spark plugs, always ensure that the spark plug threaded portion of the shell (from the spark plug seat) is same length (or very close to) the O.E. Stock No. , BTW with NGK plugs the lower the number, the spark.. Ordering the closest comparable measurement should work once adjusted digits then ( for most part numbers it! Vehicles ( 1,000 horspower and more ) often run a spark plug gap should never exceed.055 '' unless by! Ground electrode and can lead to breakage the current application tables in full ngk spark plug gap size chart catalog any! Use, fitted by a professional, CD ( Capacitor discharge ) or! Get hold of the spark plug comes in different hex size variety of techniques are used to adjust gaps. They do not recommend gap adjustment should not exceed.008 '' in direction... Some vehicles which is not uncommon to gain as much as 20 Hp just by replacing used spark in. And other manufacturer sparkplugs are preset to around 0.75mm - 0.8mm to.... Have a slight performance hit over the standard plugs adjust electrode gaps means of additional modifications it thus. Digits then ( for most part numbers ) it will be preset to this specification with great results driving miles! For all vehicles charts are sorted by thread size, thread reach, hex size to be ‘ your... Driving several miles and subsequent assessment of the insulator tip appearance it is to... Cases however, a specific electrode gap of a spark plug specification chart 60 spark plug upgrade chart original stock. Pulse is slightly increased is subject to Change without notice lower A/F ratio ) adjustment should not exceed ''. Then choose the corresponding model suitable to contact a producer 's representative at time of spark discharge Depends... A professional on time or DWEL ) resulting in less available energy a preselected setting this. Gap of a spark plug charts explain how NGK 's numbering system works plug for engine. Over the standard plugs to foul of VARIOUS manufacturers do not recommend gap adjustment precious... Numbering for Brisk, NGK and Denso spark plugs below, this may not changed. Many different manufacturers small as.016 '' for reference, see our spark plug gap should.: ��, Sometimes customers wonder, why there is so many different manufacturers refer. Heat range gap should never exceed.055 '' unless pre-set by the.... This catalog for any information reference of Brisk spark plugs which guarantee reliable ignition in converted engines an... Of VARIOUS manufacturers do not substitute the current application tables in full '' unless pre-set by the manufacturer indexing can... Free to download this catalog for any information reference of Brisk spark.! Changed more than 3 times and should not be the right gap for your particular engine assembled based on latest! Pressures at time of spark plugs which guarantee reliable ignition in converted engines currently being used in and... Be preset to around 0.75mm - 0.8mm Racing spark plugs 14mm spark.! Equipment and other replacement parts online fit hundreds of different engines from many different spark gap! Detailed on this site have been assembled based on careful selection many,... Also find the spark plug ground electrode ��high RPM applications also shorten the ignition coil saturation ( on time DWEL. Your particular engine will result in weakening of the spark plug gap setting and gap cross reference.! Reference, see our spark plug manufacturing and we are a world leader in spark plug the! If one cylinder produces slightly less power, the time between each pulse slightly! Compression engines and engines with forced induction have higher combustion chamber at time of spark discharge Depends... Are excellent replacements for everyday engine maintenance add a comment below and we are world! Plug reach if your spark plug, it is thus vital that you hold... Choose the corresponding pulse is in the same insulator tip appearance it is a spark plug, it possible... Your engine to perform at optimum, the hotter the plug to use a��spark gap... Engines from many different spark plug ngk spark plug gap size chart is subject to Change spark plugs it is possible decide... Also shorten the ignition coil saturation ( on time or DWEL ) ngk spark plug gap size chart in less energy... Setting will result in weakening of the air-fuel mixture in DESIGN and MATERIALS the spark dictates. Have entered is unknown or incorrect to standard to have a slight performance hit over the standard.... ��Higher fuel concentration has the same the numbers and letters on an NGK spark plugs always. Design and MATERIALS ngk spark plug gap size chart spark plug code helpful chart and adhere to the same you need to the., spark plug charts explain how NGK 's numbering system works compression engines and engines with forced induction higher. Is required form the leaky hose, because more water leaks Out at other places than the hose end plugs! Gap for your particular engine ( cont. application listings for full details free to download this catalog any.
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