DescriptionThis video provides step-by-step instructions for replacing the spark plug on Honda small engines, commonly found in Shindaiwa and Stihl hedge trimmers, leaf blowers, and string trimmers. The most common reason for replacing the spark plug is when the engine won’t start or runs poorly and testing proves the spark plug is at fault.
All of the information in this spark plug replacement video is applicable to the following brands: Shindaiwa, Honda, Stihl
Tools used: 5mm hex head screwdriver, 5/8” socket
Step-By-Step Instructions1
Before you replace the spark plug on your engine first make sure the engine has cooled.
2
Use a 5mm hex head screwdriver to loosen the mounting screw to release the engine cover.
3
Detach the wire and boot from the spark plug.
4
Use a 5/8th inch socket or spark plug wrench to help loosen and remove the old spark plug.
5
Before you install the new spark plug confirm that the spark gap is at manufacturer’s specifications.
6
This engine model requires a 25 thousandths of an inch gap.
7
Thread the new spark plug into the cylinder head.
8
Be careful not to strip the threads by over-tightening.
9
With the new plug installed, attach the wire and boot.
10
Reposition the engine cover then thread and tighten the mounting screw to secure.