Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)

What It Is

The Powtol RJ19LM Spark Plug is a direct replacement for the Champion J19LM plug, designed for small engines in lawn mowers, generators, and pressure washers. It provides the spark needed for combustion in 4-stroke engines, typically used in walk-behind mowers and riding mowers from brands like Briggs & Stratton, Tecumseh, and MTD.

Fitment & Compatibility

Before buying, confirm your engine requires the RJ19LM plug (resistor type) or the non-resistor J19LM. This pack of two is for engines with a 14mm thread diameter and a 3/4" (19mm) reach. Common OEM cross-references include Briggs & Stratton 796112, 802592, and 5095K. It fits many Briggs & Stratton single-cylinder engines (e.g., 450, 500, 550, 625, 675, 725, 850 series) and some Kohler Command and Kawasaki engines. Check your owner’s manual or pull the old plug to verify it matches the RJ19LM size and heat range. It will not fit engines requiring a longer or shorter reach (e.g., 13mm or 1/2").

Key Things to Know

• Quality vs. OEM: Users report it performs similarly to the Champion J19LM but at a lower price. Some note the electrode gap may not be pre-set correctly—always check and adjust to 0.030" (0.76mm) before installing.
• Installation is easy: Unscrew the old plug with a 13/16" socket, gap the new one, hand-thread it, then tighten to 20 ft-lbs (or 1/4 turn past snug). Overtightening can strip the threads.
• Common gotcha: The resistor type (RJ19LM) can cause weak spark if your ignition system is old or weak—if you have misfires, try the non-resistor J19LM instead.
• Pack of 2 is handy: Keep one as a spare; spark plugs wear out every 100 hours or seasonally.

Should You Buy It

If you need a reliable, budget-friendly replacement for a standard RJ19LM plug in a Briggs & Stratton lawn mower or similar small engine, this is a solid choice. It’s great for routine maintenance, but if your engine has specific ignition quirks, stick with the OEM Champion J19LM to avoid compatibility headaches.