Why disconnect spark plug when servicing?

[jm123]

Another habit I have is disconnecting the battery cable on a rider before working on them. A wrench in the wrong place makes for sparks.

The battery arcing?

 

[reynoldston]

Any positive wire or electrical fitting to the negative side makes for sparks. The frame of the rider is a very big negative wire and very east to make a short circuit. Not so bad working on mowers but the modern cars with the computers it can cost big $$$'s. Just a habit I got into with the many years of doing this type work. Just the small job of disconnecting a battery cable can save you many hours of work if a small mistake is made. We all get habits good or bad I guess. My wife tells me this all the time when I pass gas in the evening.

 

[jm123]

Any positive wire or electrical fitting to the negative side makes for sparks. The frame of the rider is a very big negative wire and very east to make a short circuit. Not so bad working on mowers but the modern cars with the computers it can cost big $$$'s. Just a habit I got into with the many years of doing this type work. Just the small job of disconnecting a battery cable can save you many hours of work if a small mistake is made. We all get habits good or bad I guess. My wife tells me this all the time when I pass gas in the evening.

lol

 

[SeniorCitizen]

I was under the impression all walk behind mowers were killed by grounding the mag so what would be the purpose of disconnecting the plug.

Mentioned; on my riders I do disconnect the neg batt cable but for other purposes than accidental starting and the C-clamp makes that a snap. The neg clamp even gives me a place to hide the key from the grand kids.

 

[reynoldston]

I was under the impression all walk behind mowers were killed by grounding the mag so what would be the purpose of disconnecting the plug.

.

Yes you are 100% right. It takes all of 1 second in time to pull the wire off the plug and as I said earlier its more a habit then anything. I also have a wood work shop and I unplug the saws before I change the saw blades even if the switch is off. Everybody has a idea of what is safe or not. I just picked up a lot of these safety ideas when I worked for a large manufacture and it just becomes to be a habit. Is this bad or good??? As I seen in one of your earlier post you worked with large equipment I will bet your had to think safety doing that type of work.

 

[bertsmobile1]

I was under the impression all walk behind mowers were killed by grounding the mag so what would be the purpose of disconnecting the plug.

Mentioned; on my riders I do disconnect the neg batt cable but for other purposes than accidental starting and the C-clamp makes that a snap. The neg clamp even gives me a place to hide the key from the grand kids.

and are you absolutely sure it has not moved up just a tad ?

 

[SeniorCitizen]

and are you absolutely sure it has not moved up just a tad ?

I suppose nothing is for sure except taxes and death but why worry about everything little that could happen.

 

[SeniorCitizen]

Yes you are 100% right. It takes all of 1 second in time to pull the wire off the plug and as I said earlier its more a habit then anything. I also have a wood work shop and I unplug the saws before I change the saw blades even if the switch is off. Everybody has a idea of what is safe or not. I just picked up a lot of these safety ideas when I worked for a large manufacture and it just becomes to be a habit. Is this bad or good??? As I seen in one of your earlier post you worked with large equipment I will bet your had to think safety doing that type of work.

Sure did, but when the flywheel needed to be blocked to keep an engine from rotating when inside the crankcase doing bearing work that wasn't being concerned with little things. Those were big things to be concerned about. :laughing:

 

[reynoldston]

Sure did, but when the flywheel needed to be blocked to keep an engine from rotating when inside the crankcase doing bearing work that wasn't being concerned with little things. Those were big things to be concerned about. :laughing:

So big you wouldn't even feel a thing or worry about the ER.:frown:

 

[7394]

So far (knock on wood) I still have my (original equipment) 10 fingers, but have burnt them, broke them & smashed them & had bad cuts on them.. I've gotten kinda used to em in 60 years, so trying to keep em around. :thumbsup: