Do You Have To Disconnect Battery To Change Spark Plugs. The battery will not cause any problems when changing the plugs. Mowers start by centrifugal force that turns the crankshaft where the blade is attached until a spark is created that starts the combustion process.
If im jumping someone i will pull the fuse for the amp. This can be done using an adjustable wrench to match the nut. With the engine not running and the computer off the ignition system will not generate the high voltage for the spark plugs and thus you can change them without incident.
The coil can be removed once disconnected as it cant do anything by itself.
Ignition coils are often secured to the cylinder head cover with one bolt often a 10 mm. If im jumping someone i will pull the fuse for the amp. When you have confirmed that your vehicles spark plugs need to be changed as a regular item of maintenance or to remedy a performance concern it will be time to tackle the task at hand. Just shut the engine off while youre working.
