Four Seasons 36911 Engine Cooling Fan Clutch

Four Seasons 36911 Fan Clutch Overview

The Four Seasons 36911 engine cooling fan clutch is a new, standard-duty, non-thermal replacement built with an aluminum body and a flange mount. It is performance rated, meets or exceeds OEM requirements, and is made for standard-rotation and reverse-rotation applications where a non-electronic fan clutch is specified.

Compatible With Ford Bronco, F-100, F-150, F-250, F-350, E-Series vans, LTD, Thunderbird, and select Mercury and Lincoln applications, this fan clutch is a direct-fit cooling service part for many classic truck and passenger car platforms. The Four Seasons Fan Clutch line is focused on dependable mechanical cooling control for vehicles that use a conventional belt-driven fan system.

Key Features

• Part number: 36911
• Brand line: Four Seasons Fan Clutch
• Non-thermal, non-electronic design
• Aluminum construction with raw aluminum finish
• Standard-duty style for mechanical cooling systems
• Flange mounting type with 4 bolt holes
• Standard and reverse rotation support
• Meets or exceeds OEM specifications
• Performance rated replacement part
• Fan bolt circle: 3 in. / 76.2 mm

Detailed Description

Four Seasons 36911 is a mechanical engine cooling fan clutch designed for applications that call for a non-thermal unit. It uses a flange mount, 4-bolt pattern, and a 7.2-inch maximum clutch diameter with a 2.33-inch mount diameter. The unit measures 3.31 inches in overall height and has a 0.75-inch pilot depth, making it a practical replacement for many Ford, Mercury, and Lincoln cooling systems that rely on a belt-driven fan.

This part number 36911 is listed across a wide range of classic applications, including Ford Bronco, F-150, F-250, F-350, E-150 Econoline, E-250 Econoline, E-350 Econoline, LTD, and Thunderbird models, along with Mercury Grand Marquis, Cougar, Marquis, and Lincoln Town Car applications. If you are servicing a Ford Bronco or F-Series truck with a standard-rotation fan setup, or a Mercury Grand Marquis cooling system that specifies a non-thermal clutch, this part provides the correct mechanical format for those vehicles.

This part cross-references Gates (e.g., 1710, 21011) for the same application.

What It Helps Address

• Fan clutch slip that reduces airflow through the radiator
• Cooling fan engagement issues on non-thermal systems
• Overheating concerns in belt-driven cooling setups
• Noisy or worn mechanical fan clutch operation
• Replacement needs for standard-rotation Ford and Mercury applications

Installation Notes and Tips

Verify the vehicle’s rotation direction, mounting style, bolt pattern, pilot dimensions, and fan bolt circle before installation. This clutch uses 5/16-18 bolt holes and does not include mounting hardware. Confirm that the application calls for a non-thermal, non-electronic fan clutch before replacing the original unit.

For fitment-specific service, confirm the exact year and model match for Ford Bronco, F-Series trucks, E-Series vans, Lincoln Town Car, and Mercury Grand Marquis applications. The part number 36911 is commonly searched for classic Ford cooling repairs, including Ford Bronco fan clutch replacement and Mercury Grand Marquis fan clutch service.

Quality Assurance

Four Seasons lists this fan clutch as new, performance rated, and meeting or exceeding OEM specifications. The aluminum construction and standard-duty design support consistent mechanical cooling performance in the applications shown.