4 Spark Plugs (QC10WEPI)

A Spark Plug (QC10WEPI) for Evinrude E-TEC engines. Has Iridium centered electrode to deliver maximum life, fine-wire center electrode for greater ignitability and V-trimmed ground electrode to promote sharper spark focus. You can find which plug you need on your information label of the engine.

Spark plugs should be removed and checked periodically. Damaged or worn out spark plugs should be replaced.

Instructions
Below are steps to replace the spark plug, but you can use this video too:
Step 1) Remove the spark plugs and inspect surroundings Step 2) Use the spark plug gap tool to set the right gap Step 3) Draw a line below the open side (See the image for clearance) Step 4) Insert new spark plug Step 5) Check if spark plug is indexed correct.

Indexing:

Spark plug indexing positions the ground electrode
of the spark plug opposite the fuel injector
nozzle.
Put an ink mark on the ceramic of the spark plug
in line with the OPEN side of the ground electrode.
This mark will be used to orient the spark
plug with the OPEN side of the ground electrode
facing the fuel injector.

Apply Triple-Guard grease to the gasket surface
of the spark plug. Install it and tighten to
a torque of 15 ft. lbs. (20 N·m).

If the mark is in unshaded area do not tighten anymore.

If the mark is in the shaded area, reset torque
wrench to 30 ft. lbs. (41 N·m) and continue to turn
until the mark is in the unshaded area.
If the mark does not reach the unshaded area
before the torque of 30 ft. lbs. (41 N·m) is reached,
the spark plug cannot be indexed for that cylinder.
Try another spark plug and repeat the steps
above.