Sparkplug size and gap

the r45ts8 plugs are pre-gapped to 0.080" (2mm).

R= resistor
4= thread size 14mm
5= heat range 5 (0 is coldest - 9 hottest)
TS= tapered seat with extended tip
8= pre-gapped to 0.080" (2mm)

if you by the recommended plugs , the shop will tell you which are recommende for vehicle , they are set at correct gap

measure old gap add 3 thousndth to it you have your gap

No difference in gap, just resistor plug does'nt interfere with radios,tv,electronic equipment

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Those are as easy as they come these days. Mark each spark plug wire with a piece of tape with the cylinder # written on it, so as not to mix up the wires. Remove each spark plug wire by firmly grasping the wire by the boot (do not pull on the wire) and twist it back and forth a few times while pulling slowly. It should pop off without a great deal of effort. If it is seized and it breaks, you will have to replace the wire, or at the very least replace the terminals (if you can get some). Use an air hose and blow around the base of each spark plug to dislodge any loose dirt that could fall into the cylinders (not absolutely necessary, but a good idea). Remove each spark plug with a spark plug socket and extension and ratchet (I forget which size socket, it's either 5/8 or 13/16). Check the gaps of each new spark plug (typically around 0.035 in). re-install each new spark plug by hand (do not cross-thread them) and once you have ensured that the plug is threaded in properly, tighten the plug until it seats, and then tighten an additional 1/16 of a turn. Repeat this for the remaining plugs. Re-install wires to the corresponding spark plugs. You're done!

This may be shown on the emissions label under the hood. You can also visit advance auto parts website and key in your year, make, model and search for spark plugs. They will show the appropriate gap size for each type of plug.

the sparkplugs are shipped with the propper gap setting *DO NOT CHANGE IT"

if its been altered, place a penny in the gap, and thats the space it should be gapped.

Spark plug gap is .025

As for the air gap in-between the flywheel, and magneto, I generally start with a piece of notebook paper in-between them.

After the bolts are snugged down, turn the flywheel by hand to spin the paper out.

Find out what your spark plug gap is, and the size of plugs you require from your owners manuel. Purchase a Spark plug socket for your rachett (also a rachett extension if you dont have one) And a set of Gap Measurers. Pull out the spark plug leads from the base making sure you don't pull on the cable (can damage the lead if you yank on the cable instead of the boot) and then screw out the old sparkplug and check for damage/wear. Set the gap on your new sparkplugs and screw them back in using a torque wrench for the final turn or if you don't have one only hand (do the final turn without using the rattchet just grab the wratchet extension and twist with your hand).