Mayhew Spark Plug Thread Chaser (37900)

Description

The Mayhew Spark Plug Thread Chaser (37900) is an indispensable tool for anyone performing engine maintenance. Designed with precision, this tool effectively cleans and re-forms existing spark plug threads in a cylinder head, ensuring that new spark plugs can be installed correctly and securely. It addresses common issues like rust, carbon buildup, or minor damage that can impede proper spark plug seating, thereby preventing costly thread stripping and promoting optimal engine performance.

KEY FEATURES AND BENEFITS:

• Dual-Size Capability: Equipped with both 14mm x 1.25mm and 18mm x 1.50mm thread chasers on opposing ends, offering versatility for common spark plug sizes.
• Easy Operation: The hexagonal body allows for effortless driving with a standard 13/16″ wrench or deep socket, providing a firm grip and controlled application.
• Thread Restoration: Specifically engineered to clean and re-form existing threads, not cut new ones, which helps preserve the integrity of the cylinder head.
• Enhanced Durability: Made from low carbon steel with a specialized heat treatment and a black nitride finish, ensuring long-lasting performance and resistance to wear and corrosion.
• Precise Alignment: A rubber O-ring is integrated to prevent slippage and assist in maintaining correct alignment during the thread cleaning process.

SPECIFICATIONS:

• Dimensions:
• Length: 4.375″
• Width: 1.875″
• Height: 0.850″
• Weight: 0.134 lbs.
• Brand: Mayhew
• Manufacturing Location: Made in U.S.A.
• Included in purchase: Mayhew Spark Plug Thread Chaser (37900)

HOW TO USE:

• Safety First: Ensure the engine is off and cool. Disconnect the spark plug wire from the spark plug.
• Remove Spark Plug: Carefully remove the existing spark plug from the cylinder head.
• Select Size: Identify the correct thread size (14mm or 18mm) on the chaser that matches your spark plug hole.
• Insert Chaser: Gently insert the appropriate end of the Mayhew Spark Plug Thread Chaser into the spark plug hole, ensuring it aligns with the existing threads.
• Engage Threads: Using a 13/16″ wrench or deep socket, slowly turn the chaser clockwise. Apply light, steady pressure to allow the chaser to engage and clean the threads.
• Clean and Remove: Continue turning until the chaser passes through the damaged area, cleaning and re-forming the threads. Then, carefully turn counter-clockwise to remove the chaser.
• Clean Debris: Use compressed air or a vacuum to remove any metal shavings or debris from the spark plug hole before installing a new spark plug.

BENEFITS OF USING MAYHEW SPARK PLUG THREAD CHASER (37900):

• Prevents cross-threading: Ensures smooth and correct spark plug installation, avoiding expensive repairs.
• Maintains torque integrity: Restores threads so spark plugs can be tightened to factory specifications.
• Extends thread life: Repairs minor damage, reducing the need for inserts or costly head removal.
• Ideal for professionals and DIYers: Simplifies routine maintenance tasks with reliable results.
• Cost-effective solution: Offers an affordable way to restore spark plug threads without advanced tools.

FEATURES:

• Designed to clean fouled spark plug threads, not cut new ones
• Dual thread sizes: 14mm x 1.25mm and 18mm x 1.50mm
• Specially heat-treated low carbon steel construction
• Black nitride finish for enhanced abrasion and rust resistance
• Integrated rubber O-ring for secure and aligned use