Briggs & Stratton Lawn and Garden Equipment Engine Spark Plug Boot 66538S

Brand: Briggs & Stratton · Fits: 122 models · Reference price: $5.64

66538S is a Briggs & Stratton replacement part (briggs & stratton lawn and garden equipment engine spark plug boot). Our fitment data lists 122 models that use it.

When to replace this part

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Models that use this part

Part numbers it replaces

The manufacturer lists 66538S as the replacement for these earlier part numbers. Substitute parts can look different from the original but serve the same function.

• 100-074 — Briggs & Statton Lawn & Garden Equipment Engine Synthetic Oil, Sae 5W-30, 32-Oz
• 100106 — Briggs & Statton Lawn & Garden Equipment Engine Liquid Sealant
• 280225 — Washer Timer
• 592846 — Briggs & Stratton Lawn & Garden Equipment Engine Ignition Coil
• 690972 — Briggs & Statton Lawn & Garden Equipment Engine Rocker Arm
• 690982 — Briggs & Statton Lawn & Garden Equipment Engine Intake Valve Push Rod
• 797503 — Briggs & Statton Lawn & Garden Equipment Engine Intake Manifold Assembly
• 84012885 — Ignition Coil
• DD82-01380A — Dishwasher Circulation Pump
• WP74005747 — Range Control Panel

Other parts for model 281707-0428-01

If you are repairing that appliance, these are the most model-specific parts on file for the same model.

• Briggs & Statton Armature 490309
• Briggs & Statton Base 490452
• Briggs & Statton Body Assembly 490473
• Briggs & Statton Bracket 223866
• Briggs & Statton Bracket 223925
• Briggs & Statton Brush 490311
• Briggs & Statton Cap 490310
• Briggs & Statton Cartridge 399806S

Reference price and where to compare

The reference price on file for this part is $5.64. It is informational only, not an offer or an Amazon price — RepairKitHub does not sell parts directly.

Compare 66538S listings on Amazon

Before you order

• Match the part number character for character, including dashes and trailing letters; a single different character is usually a different part.
• Confirm your appliance's model number on its data plate and check that it appears in the list above (or use the model lookup tool).
• If a seller offers a substitute number, check that it appears in this page's replacement list or in the manufacturer's documentation.

Model lookup tool