Lawn mower spark plug chart

lawn mower spark plug chart

Learn how & where to find the right spark plug and a gap chart to guide you through … maintenance and when troubleshooting problems with your lawn mower.

How do I know which spark plug for my lawn mower?

Consult with your manual: If you can’t find the old spark plug or for some reason it is missing from where it has been pre-installed, consult with the owner’s manual to locate the right spark plug to use. Write down the make and model of the lawnmower as well as the model number of the engine.
What spark plug do I need for my Briggs and Stratton?
Replacement Part TypeBriggs & Stratton Spark Plug Part NumberSpark Plug Gap
Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC)696202 5066 (5066D, 5066H).030”
Resistor Spark plug – hotter spark (Replaces Champion RC14YC)496018S 5092.030”
Resistor692051.020”

What should the gap be on a lawn mower spark plug?

between 0.028 and 0.031 inches
Checking and Gapping the Spark Plug
The gap, or distance between the electrodes, should be between 0.028 and 0.031 inches. Check the gap with a gap gauge and adjust the ground electrode until the gap falls between the two numbers.
What happens if you use the wrong spark plug in a lawn mower?
if it does, using too cool of a plug may cause it to foul either causing the engine to stall, or make future starts after the initial, difficult.