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

Dennis WaldenSep 13, 2021

Spark plugs are typically located on the back or side of a lawn mower engine. Look for a short wire that's about 1/4-in. -thick leading to the top of a short, cylindrical protrusion from the engine. If you're not sure where the spark plug is, consult your owner's manual.

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Herein, do you need a specific spark plug for lawn mower?

Lawn mower gasoline engines and automobile gasoline engines both use spark plugs to ignite the fuel/air mixture in their cylinders. ... Some automotive and lawn mower spark plugs may be interchangeable, but many others are not because of physical differences.

Then, what's the spark plug gap on a Husqvarna lawn mower? The Husqvarna manual I downloaded reads that the spark plug gap is to be .040"; the B&S manual I downloaded says . 030"; the old ones I replaced had a gap that when measured was . 026".

One may also ask, where is the spark plug on my Husqvarna push mower?

Will a lawn mower start with a bad spark plug?

A dirty or fouled spark plug can cause your lawn mower to not start. It can also work itself loose, causing issues. If the spark plug appears to be seated correctly but the engine doesn't start, a new one may be in order.

How often should a lawn mower spark plug be changed?

every 25 hours

What is the difference between RC12YC and RC14YC spark plug?

What is the difference between rc12yc and rc14yc spark plug? The higher number is a slightly hotter spark type plug. The RC14YC4 is now the standard plug for the 990/992 Generac engines. The 999 in the new 16-22kW Evolution (7000 series) units and older 20kW units are still using the cooler RC12YC4 plugs.

Is spark plug RC12YX the same as RC12YC?

We can find no cross reference for RC12YX to any NGK number, but RC12YC does cross to NGK BCPR5ES .

What kind of spark plug does a Briggs and Stratton?

Flathead Engine Spark Plugs & Gaps
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”
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About The Author

Dennis Walden

Dennis owns a small farm and loves to grill since his early childhood. He’s a professional cook, but hiking and enjoying the great outdoors is his no less favorite part of life.