Tune Up Kit fits Scotts Lawn Mower S1642 Replaces LG191 Includes Oil

What It Is

This tune-up kit for the Scotts S1642 lawn mower bundles the essential service parts—spark plug, air filter, fuel filter, and a bottle of oil—into one package. It’s designed for a single annual maintenance pass on residential walk-behind mowers with a Briggs & Stratton engine.

Fitment & Compatibility

Before buying, confirm your mower’s model number (look under the seat or on the frame) matches S1642. This kit is not universal—it’s specific to Scotts S1642 mowers with the Briggs & Stratton 500E/550E series engine. Check your engine’s model number (stamped on the blower housing) to verify. The included oil is SAE 30 weight (usually 20 oz.), so if your engine requires synthetic or a different viscosity (e.g., 5W-30 for cold climates), you’ll need to swap it. The kit is an aftermarket replacement for OEM part LG191; it fits but isn’t a genuine Scotts part.

Key Things to Know

• Quality is budget-grade: The spark plug and filters are basic aftermarket items. Expect them to work fine for one season, but don’t expect premium longevity.
• Installation difficulty is low: You’ll need a socket wrench for the spark plug (check gap to 0.030 in.) and a screwdriver for the filters. Oil change is straightforward—drain old oil first.
• Oil included may not match your climate: The SAE 30 oil is fine for warm weather (above 40°F). If you mow in cooler temps, buy separate 10W-30 or 5W-30.
• Check fuel filter orientation: The kit’s filter is arrowless; install it with the flow direction matching your original (usually arrow toward the carburetor). A common gotcha is installing it backwards, which restricts fuel flow.

Should You Buy It

Buy this kit if you own a Scotts S1642 with a Briggs & Stratton engine and want a one-stop, low-cost solution for basic annual maintenance. It’s a decent value for the price, but skip it if you need OEM-grade parts, run a different engine, or prefer synthetic oil—you’ll be better off buying individual components.