698369 Air Filter Tune Up Kit Compatible with Briggs Stratton 3.5-4.5 HP Classic Sprint Quattro Engine, Replaces 495770 795083 Gasket Diaphragm with Spark Plug for Lawn Mower

What It Is

This is an air filter tune-up kit designed for Briggs & Stratton engines in the 3.5–4.5 HP range, specifically the Classic, Sprint, and Quattro series. It includes an air filter, pre-filter foam, gasket, diaphragm, and spark plug, making it a one-stop maintenance set for push mowers, tillers, and other small equipment using these engines.

Fitment & Compatibility

• Engine models: Works with Briggs & Stratton Classic (e.g., 450E), Sprint (e.g., 450S), and Quattro series engines. Not for larger Vanguard or Intek engines.
• OEM part numbers: Replaces 495770 (air filter), 795083 (gasket/diaphragm). Spark plug is a standard J19LM or equivalent.
• Check before buying: Verify your engine’s model number (stamped on the blower housing or valve cover). Measure the air filter housing opening – the filter is roughly 3.5” x 1.5” x 1.5”. This kit is aftermarket, not OEM Briggs & Stratton, so fit may vary slightly on older or non-standard decks.
• Deck size: No direct deck size limit – it’s engine-specific, not mower deck-specific.

Key Things to Know

• Quality: At $10.99, it’s budget-friendly but reviews (4.1/5, 4 reviews) are limited. Expect basic construction; the foam pre-filter may be thinner than OEM.
• Installation difficulty: Easy – 10-15 minutes for most users. Remove the air filter cover, swap the old filter and gasket, replace the spark plug (check gap: 0.030”)
• Common gotcha: The included diaphragm is for the fuel pump on some Quattro engines. If your engine doesn’t have a fuel pump (most Sprint/Classic don’t), this part is unnecessary. Double-check your engine’s fuel system before buying.
• Spark plug: Pre-gapped, but always verify with a feeler gauge. It’s a standard plug, easy to find replacements if needed.

Should You Buy It

This kit is a decent budget pick for a quick tune-up on a common Briggs & Stratton 3.5-4.5 HP engine, especially if you need both the air filter and spark plug. However, with only 4 reviews and a potential extra diaphragm you may not use, it’s best for cost-conscious DIYers who don’t mind a non-OEM part. For critical or commercial use, stick with OEM Briggs & Stratton parts for guaranteed fit and reliability.