.025
22 thousands
.039-.043" gap 14-22 ft/lbs torque
22 thousands or the width of a cigarette package.
0.043 for 2002. Go with a platinum tipped. 14 - 22 Ibs with a torque wrench
For a 2001 Toyota Sequoia, the factory and spark plug manufacturer recommended gap is .032" (.813mm). The spark plug manufacturer's recommended torque for flat-seated plugs / aluminum heads is 20-30 n-M (15-22 ft lbs), but double check your owner's manual (if available) to be sure.
Gap the plugs .038" to .043" and torque the plugs to 22 ft/lbs.
If it is not written/stamped on the engine, and you don't know the model number of the mower, you could go by the spark plug itself. For instance, a Champion brand CJ8 spark plug is typically set to .030" Most mowers are either .025" or .030" so if you can't find it elsewhere, try one of those.
Loosen and move the air intake tube for better access. Remove the three 13mm bolts of the spark plug coil rail. Cut the two zip ties of the spark plug coil rail. Remove the spark plugs with 5/8 spark plug socket. Check the gap on the spark plugs. Torque the new plugs in (22 ft/lbs). Replace the spark plug coil rail and air intake tube. heres a link with more step by step info: http://jeep.us41.org/sparkplugs/index.html
A champion RC12YC spark plug is 14mm thread diameter. The torque for this size is 18-22 foot-pounds (25 to 30Neuton·meters)
rj8 is used for a 7hp Tecumseh that powers a 22" yardman snowthrower
First thing is to go purchase a set of Motorcraft Spark Plugs for your Mercury, a feeler gauge, and anti-seeeze compound in a tube. You can buy another brand if you wish but Motorcraft is the OEM plug. Start with the one easiest to get to. Use compressed air to blow debris from around the spark plug. Grab the spark plug boot connected to the plug and twist it back and forth while at the same time pulling it off. Only grab the boot and do not pull on the plug wire itself or you will break the wire. Once it is off, use the correct size SAE socket to remove the plug turning it counterclockwise. If it sticks and will not come out with normal pressure turn it back in and then out again. Keep going in and out until you remove the plug. Take the new spark plug and check the gap which should be pre-gapped at the factory, but check it anyway and make sure it is gapped at .054. After checking the gap coat the plug threads with anti-sieze compound. Screw the plug in by hand if possible or with a plug socket if necessary. Tighten the plug down to 22 ft/lbs torque. If you do not have a torque wrench use a ratchet and socket and tighten it down holding the ratchet near the socket and not out on the end of the handle. Tighten it until it is snug and do not leave it loose or over tighten. Replace the plug wire by pushing the boot back on until you feel or hear it snap in place. Repeat the procedure on all other plugs. Only do them one at a time and only remove the plug wire from the plug you are replacing or you will get confused as to where they go.