12V Heavy Duty SW3 Hot Rod Starter Solenoid SS581T/ ALL7620

12V Heavy Duty SW3 Hot Rod Starter Solenoid SS581T/ ALL7620

Key Features

• Operating Voltage: 12V DC
• Terminal Configuration: Standard SW3 style
• Function: Relays high-current electrical power from the battery to the starter motor
• Construction: Heavy-duty design for high-amperage applications and durability
• Application: Suitable for use with remote start switches and timing lights

Replaces / Cross-Reference Part Numbers

• SS581T
• ALL7620
• ALL76203
• 2700006
• 2900550
• B4TZ-11002-A
• B6A-11002A
• B-6A-11450A
• C6AF
• C7AF
• C9AF
• F496
• SS588
• 66-200

Compatibility & Fitment

• Commonly used in hot rods, custom vehicle builds, and heavy-duty applications.
• Fits various Ford models including 2000, 3000, and 4000 series tractors (1956 and newer).
• Compatible with select Ford Bronco, Mercury, and Evinrude applications.
• Note: Always verify fitment by cross-referencing your original part number.

When to Replace

• Engine fails to crank or makes a single, loud clicking sound when the ignition is turned.
• Intermittent starting issues where the vehicle sometimes starts and sometimes does not.
• The starter motor continues to run after the engine has started.
• No sound or action from the starter when the ignition key is in the start position.

Installation Tips

• Always disconnect the negative battery terminal before starting work.
• Take a photo or label the wires connected to the old solenoid to ensure correct placement on the new unit.
• Clean all wire terminals and connection points to ensure a solid electrical contact.
• Securely mount the new solenoid in the original location, away from excessive engine heat or direct moisture.