Husqvarna Part Number 503235111 Spark Plug

What It Is

The Husqvarna 503235111 Spark Plug is a replacement ignition component designed for select Husqvarna lawn mowers, riding mowers, and other small engines. It ensures reliable engine starts and efficient combustion.

Fitment & Compatibility

Before buying, verify your engine model. This plug fits Husqvarna engines with a 14mm thread size and .030" gap. Check your owner’s manual for the recommended spark plug type—this is an OEM part, not universal. Measure the old plug’s thread length (approx. 19mm) and reach. It’s not compatible with most Briggs & Stratton, Kohler, or Kawasaki engines without cross-referencing. For non-Husqvarna machines, confirm the plug’s heat range and gap match your engine specs.

Key Things to Know

• Quality: OEM Husqvarna part ensures correct heat range and durability; cheaper aftermarket plugs may cause misfires.
• Installation: Easy—remove old plug with a socket wrench, gap new one to .030" with a feeler gauge, hand-tighten then torque to 20-25 ft-lbs. Overtightening can strip threads.
• Common Gotcha: This plug is pre-gapped, but always double-check—shipping can alter it. Also, use anti-seize compound on threads if the engine is aluminum to prevent seizing.
• Frequency: Replace annually or every 100 hours of use for best performance.

Should You Buy It

If you own a Husqvarna mower with a compatible engine and want a guaranteed fit with OEM reliability, this plug is a smart, low-cost purchase. It’s ideal for DIY maintenance—simple to install and improves starting and fuel efficiency. Not worth it if you have a different brand engine or prefer a cheaper generic plug.