#Spark plug chart full

All sparkplugs listed meet or exceed manufacturer specifications. In addition it is often more convenient to use aftermarket spark plugs aside from the enhanced performance. Charts, General Tips honda spark plug, jet ski spark plugs, kawasaki spark plug, seadoo spark plug, yamaha spark plug.

#Spark plug chart full

Free Shipping is Back Full line of NGK Canada products, Laser Iridium Spark Plugs. The plug type on a spark plug is composed of a basic Heat Range number with. NGK and Autolite among others have always been a preferred performance plug for Harley motorcycles. Standard Spark Plugs NGK Spark Plugs, NGK Wire Sets, NGK NTK O2 Sensors. Replacements For Discontinued Spark Plugs. While the motor company only recommends use of their original equipment Harley brand spark plugs, the other brands often exceed original specification and will not void your warranty.

Excessively engine operating temperatures.įigures 28 and 29 show plugs that have been over heating due to intense knocking and pre-ignition.Harley Davidson Spark Plug Cross Reference Chartīelow is a cross-reference list of spark plugs for use in most Harley models.

usually due to operating with an excessively high loaded prop. Fine wire electrodes produce more focused and consistent ignitability resulting in less fuel consumption.

Plug heat rating too low, permitting the plug to exceed the optimum operating temperature range of 1560 - 1830 deg. Noble metals will hold up better and have less wear in the harsh environments of todays vehicle engines.

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Oil pumping past worn piston rings And valve guides. Identifying Spark Plugs - The Green Spark Plug Company Menu Search Account.

Below is a spark plug thread size chart that you can use for future references.

Although there is no standard size for spark plugs, 16mm is the most common spark plug thread size. The plugs illustrated in Figures 25, 26, and 27 show varying degrees of melting of the electrode and may be the result of: In brief, the thread size of a spark plug indicates the size of the thread that will be screwed into a cylinder head. The following are the most popular Top Selling Spark Plugs.

Excessive cooling usually caused be an improperly functioning cooling system.

Use of air-fuel mixtures richer than about 8:1 - 10:1 Dark brown or Black Spark Plug: Too rich Black, oily Spark Plug: Oil fouled (see valves or piston rings.) White, no color. CLICK THE PART NUMBER TO PURCHASE Evinrude E-TEC G2 HP Evinrude E-TEC G2 HP Year Plug number Gap P/N 150/175/200 66° AG QC10WEPI 0.028 5010260 200/225/250/300 74° AB-thru QC8WEPI 0.028 5009521 Evinrude E-TEC HP Evinrude E-TEC HP Year Plug number Gap P/N 25/30 2009-AF QC10WEP 0.

also may be due to too light prop loading conditions.

A plug with too high a heat rating being used and the firing-end not reach it's self cleaning temperature of 750 - 840 deg.

Oil pumping past warn piston rings and valve guides.įigures 3, 4, and 5 show the sooty plugs, which are usually the result of:.

Even plugs presenting a good appearance, as those shown in Figures 6 - 24, can quite often be covered with lead deposits, which cause misfiring.įigures 1 - 2 show wet plugs and are normally attributed to one of the following causes: When it comes to spark plugs, its easy to think that a hotter spark is always better, since the primary goal of a plug is to ignite the fuel at just the right. NGK always works very closely with the engine manufacturer to ensure a perfect match between spark plug and machine. In fact NGK produces and stocks well in excess of 1,000 different types of spark plugs. The information below is intended to assist you in correctly choosing your spark plugs and deter-mining operating condition of your engine. NGK has the technology to produce spark plugs for every type of automotive engine, as well as for motorcycles, marine, horticultural and any other applications. The appearance of the firing-end of a spark plug shows how well an engine has been operating, the suitability of the plug heat rating, and whether or not the carburetor and ignition timing are properly adjusted. The information below was taken from a pamphlet given out on NGK Spark Plugs in the late 1970's, it is just as valid today as it was then.