What size socket do I need to remove a lawn mower spark plug?
Drive socket wrench in 1/2 inches or 3/8 inches, whichever is appropriate for your machine. New spark plug.
In this manner, what size is a lawnmower spark plug?
Ideally, most automobile spark plugs use a thread size of about 14mm thread why those of lawn mower range between 10 to 12 mm.
Similarly one may ask, how do you determine spark plug socket size?
A plugs hex size determines the socket required for installation. While 5/8" (16mm) and 13/16" are the two most common plug hex sizes, plugs can have a hex as small as 8mm or larger than 1".
Do lawn mower spark plugs come pre gapped?
Check the gap on the new spark plug before installing it. A new plug will often come pre-gapped to match your specific engine, but use a spark plug gauge to verify that it matches the manufacturer's specifications.Like I stated in the above paragraphs, spark plug sockets "cradle" the spark plug so it will not get damaged. A traditional socket would not hold the spark plug snug enough and it would fall out upon installation or removal, which could cause damage to the spark plug itself.NGK Spark Plugs for Briggs & Stratton Engines
|BRIGGS & STRATTON GAS ENGINES -- All models except twin cylinder, Vanguard Intek, 19A400-19G400 series
|Replacement Part Type
|Briggs & Stratton Spark Plug Part Number
|Spark Plug Gap
|Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC)
|696202 5066 (5066D, 5066H)
|Resistor Spark plug - hotter spark (Replaces Champion RC14YC)