Oregon 77-301-1 Spark Plug – Replacement Lawn & Garden Equipment Engine Ignition Component

Part Number: 77-301-1
Category: Oregon Lawn & Garden Equipment Engine Replacement Parts
Type: Replacement Small Engine Spark Plug – Champion J19LM Equivalent

The Oregon 77-301-1 Spark Plug is a replacement engine ignition component designed for compatible Briggs & Stratton and other gasoline-powered small engines. Featuring a 14mm thread diameter, 9.5mm thread reach, gasket-style seat, and 0.75mm electrode gap, this spark plug supports reliable ignition and consistent engine performance. Designed as a replacement for Champion J19LM and Bosch W9EO spark plugs, the Oregon 77-301-1 is suitable for select lawn mowers, lawn tractors, and other outdoor power equipment. It provides a practical replacement for worn, fouled, or damaged spark plugs during routine engine maintenance.

Product Specifications

• Part Number: 77-301-1

• Brand: Oregon

• Product Type: Small Engine Spark Plug

• Component Type: Engine Ignition Spark Plug

• Thread Diameter: 14mm

• Thread Pitch: 1.25mm

• Thread Reach: 9.5mm (3/8")

• Hex Size: 21mm (Approximately 13/16")

• Seat Type: Gasket Seat

• Electrode Gap: 0.75mm (Approximately 0.030")

• Recommended Tightening Torque: 20–30 Nm

• Maximum Listed Service Interval: 150 Hours

• Compatible Engine Brand: Select Briggs & Stratton Engines

• Replacement References: Champion J19LM and Bosch W9EO

• Additional Cross-References: Stens 130-211 and 131-007

• Previous Oregon Reference: 77-301

• Standard Manufacturer Package: 10 Spark Plugs

• Application: Small Engine Ignition System Maintenance

• Condition: New

Features & Benefits

• Genuine Oregon 77-301-1 replacement spark plug

• Designed for compatible Briggs & Stratton small engines

• Features a 14mm thread diameter and 9.5mm thread reach

• Gasket-style seat provides a secure connection when properly installed

• Supports dependable engine starting and consistent combustion

• Helps maintain reliable small engine ignition performance

• Replaces compatible Champion J19LM and Bosch W9EO spark plugs

• Suitable for routine engine tune-ups and maintenance

• Provides a replacement for worn, fouled, or damaged ignition components

Applications

• Select Briggs & Stratton gasoline-powered engines

• Compatible lawn mower engine ignition systems

• Walk-behind lawn mower maintenance

• Riding lawn mower and lawn tractor engine servicing

• Small engine spark plug replacement

• Outdoor power equipment ignition repairs

• Applications specifying Champion J19LM spark plugs

• Equipment requiring Oregon 77-301-1 spark plugs

Important Information

• Verify Oregon part number 77-301-1 before ordering.

• The manufacturer identifies a standard package of 10 spark plugs; confirm the quantity offered in this listing.

• Replaces Champion J19LM and Bosch W9EO in compatible applications.

• Confirm the required 14mm thread diameter, 9.5mm thread reach, and gasket-style seat.

• The specified electrode gap is 0.75mm (approximately 0.030"); follow your engine manufacturer's recommended gap.

• Not every Briggs & Stratton or other small engine uses the same spark plug.

• Verify compatibility using your engine model and original spark plug part number.

• Use the manufacturer's recommended tightening torque during installation.

• Replace worn, fouled, cracked, or damaged spark plugs according to the recommended maintenance schedule.

• Disconnect the ignition wire and allow the engine to cool before servicing.

• Follow the engine manufacturer's installation and safety instructions.