#Stihl spark plug chart ngk manual#
#Stihl spark plug chart ngk code#
#Stihl spark plug chart ngk series#

There are enormous models and brands of spark plugs in the marketplace, which can confuse an instance. The ground electrodes are very fragile, which increases the rate of sparkplug getting damaged due to after-sale gapping. Frequently Asked Questions (FAQs)īosch sparkplugs officially come as a pre-gapped one from the factory itself. Whereas most commonly used sparkplugs have a longer thread length for bigger parking areas. Some sparkplugs have a shorter thread length for a small sparking position. The last segment of the sparkplug part number shows a firing end construction and the presence of any special designs for improving performance. Firing End Construction and Special Design The values seven and six means somewhat hotter and cold rating in BPMR7A and WSR6F sparkplugs. A lower value indicates hotter sparkplug and wise versa.

It defines how cold or hot the heating rating rates the sparkplug. You will find a numerical value from two to ten in the next phase. We can see the letter R present in both “BPMR7A” and “WSR6F” of NGK and Bosch in the presence of a ceramic resistor. Sparkplugs with a different resistor use a different letter or value to specify that. Most widely used sparkplugs use a ceramic resistor built inside the structure. The term “R” in the part number of the sparkplugs reveals the construction type and material used for the resistor. That is why there is no mention of size in the “WSR6F” of Bosch, as it is a regular sparkplug. The sparkplugs, which are exceptionally short and compact, use the term to specify the size.įor example, the letter “M” in “BPMR7A” of NGK defines the sparkplug as compact and shorter than standard sparkplugs. However, most standard-sized sparkplugs do not use this term. Numerical values are not used rather, a standard size parameter is used to show the dimension for this purpose. The third letter of the part number shows the physical dimension of the sparkplug. Some sparkplugs do not have the socket and thus miss a letter in the part number.įor example, the letter “B” in “BPMR7A” and “WS” in “WSR6F” defines the thread diameter, and socket size of NGK and Bosch spark plugs, respectively. Most sparkplugs, including Bosch and NGK, use a standard 14mm thread and 19mm socket. The first letter or first two letters specify the sparkplugs’ thread diameter and socket type.

#Stihl spark plug chart ngk manual#

For better understanding, referring to the manufacturer’s specifications and manual is recommended.

#Stihl spark plug chart ngk code#

However, the meaning of the code is different for different brands, but the core structure is the same for all. The combination of alphanumeric code includes the structural and functional specifications of the spark plug. The numbers mentioned on the packaging of the sparkplugs do not only show the model or batch number. You can use the following cross-reference chart to ensure which NGK spark plug models are Bosch R10 spark plug compatible. Therefore to get an NGK sparkplug for swapping a Bosch sparkplug, you must get a similar resistor and heat rating for optimum compatibility. It shows the sparkplug is a cold-featured one. Moreover, ten is the highest number on the scale, which determines the heat rating. The “R” stands for the resistor construction, whereas ten means the heat rating of the sparkplug. It specifies certain features of the Bosch sparkplugs. You might have noticed an “R10” written in the part number of Bosch sparkplugs used in small trimmers. But there are many minute differences between them, due to which you cannot directly perform swapping. The standard construction process and structure for all the sparkplugs are quite identical. Hence stay tuned and go through the article till the end. In this article, we have brought you a compatibility chart using which you can easily determine any Bosch R10 to NGK in no time. It can be tedious to manually search for compatible NGK spark plugs by reading and matching the part numbers. There are many important factors, such as tread length, thread diameter, electrode gap length, core material, and heat rating, to be considered before doing so.

#Stihl spark plug chart ngk series#

Are you planning to switch the Bosch R10 series of spark plugs with an NGK one? Well, you cannot simply swap a Bosch spark plug with any NGK one. Bosch and NGK are famous for making quality and durable spark plugs.