[Lifetime Warranty] SFD6025 8N-11450 Starter Solenoid Relay 12V 3 Terminal Replacement Compatible with Ford 2N 8N 9N Tractor - Replaces SW218 SW355 10-FO218-12V 7-1023-12V
12V 3-terminal starter solenoid relay for Ford 2N, 8N, and 9N tractors with mounting bracket.
Two men discussing a tractor in a store with text overlay about a 12V starter solenoid relay for Ford tractors.
SFD6025 12V 3-terminal starter solenoid relay for Ford tractors with close-up view of terminal markings.
12V 3-terminal starter solenoid relay for Ford 2N, 8N, and 9N tractors with metal mounting bracket.
Mechanic installing a 12V starter solenoid relay on a Ford tractor starter motor.
12V 3-terminal starter solenoid relay for Ford 2N, 8N, and 9N tractors with mounting bracket.
BlueStars lifestyle graphic featuring a family running in a park with the text Faster Start Keep Memories Last.
12V 3-terminal starter solenoid relay for Ford 2N, 8N, and 9N tractors with mounting bracket.
Two men discussing a tractor in a store with text overlay about a 12V starter solenoid relay for Ford tractors.
SFD6025 12V 3-terminal starter solenoid relay for Ford tractors with close-up view of terminal markings.
12V 3-terminal starter solenoid relay for Ford 2N, 8N, and 9N tractors with metal mounting bracket.
Mechanic installing a 12V starter solenoid relay on a Ford tractor starter motor.
12V 3-terminal starter solenoid relay for Ford 2N, 8N, and 9N tractors with mounting bracket.
BlueStars lifestyle graphic featuring a family running in a park with the text Faster Start Keep Memories Last.
Lifetime Warranty

[Lifetime Warranty] SFD6025 8N-11450 Starter Solenoid Relay 12V 3 Terminal Replacement Compatible with Ford 2N 8N 9N Tractor - Replaces SW218 SW355 10-FO218-12V 7-1023-12V

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SFD6025 Starter Solenoid Relay 12V 3-Post

Key Features

  • Voltage: 12V DC
  • Terminal Count: 3
  • Battery Terminal Size: 5/16 in.
  • Motor Terminal Size: 5/16 in.
  • Switch Terminal Size: #10-32 stud
  • Mounting: Flat bracket, 180 degrees
  • Application: Remote solenoid for starter motor engagement

Replaces / Cross-Reference Part Numbers

  • SFD6025
  • 8N-11450 (for 12V conversions)
  • 8N11450
  • 8N-11450-A
  • Motocraft SW1951C
  • SW218
  • SW355
  • SFD6009
  • XR-2033
  • 7-1023
  • 7-1023-12V
  • 7-1023-A
  • 10-FO218-12V
  • 240-14008

Compatibility & Fitment

  • For Ford / New Holland tractors converted to a 12-volt electrical system.
  • Fits Models: 2N, 8N (1947-1952), 9N

When to Replace

  • Engine fails to crank or cranks intermittently.
  • A single, audible click is heard when attempting to start, but the engine does not turn over.
  • Starter motor continues to run after the ignition key is released.
  • No response or sound from the starter system when activating the ignition.

Installation Tips

  • Confirm your vehicle is equipped with a 12V system before installation.
  • Disconnect the negative battery cable before removing the old solenoid.
  • Label all wires prior to disconnection to ensure correct reassembly.
  • Clean all cable ends and mounting points to ensure a solid electrical connection.
  • Securely tighten all terminal nuts to the specified torque to prevent overheating.
Product image 1
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  • Fixing Symptoms

    Fixing Symptoms

    Hard to start the engine | Clicking sound but no cranking | Slow or weak cranking of the starter motor | Intermittent operation, etc
  • Premium Quality

    Premium Quality

    Made of high-grade materials and fine craftsmanship to provide exceptional durability for long-time use
  • Saving Solution

    Saving Solution

    Enjoy our great-value package with all you need to optimize electrical systems - BlueStars brings DIY solutions to help you deal with any trouble
  • Simple Installation

    Simple Installation

    Please prepare a nut driver set in advance and wear work gloves to ensure safety. Do not overtighten the nut/terminal during installation.
WIDE APPLICATION

WIDE APPLICATION

Ford 2N 8N 9N Tractors: 2N 28HP - 4cyl 1942-1947; 8N 30HP - 4cyl 1947-1952; 9N 28HP - 4cyl 1939-1943
WORK LIKE A CHARM

WORK LIKE A CHARM

Well-crafted housing and strong Copper-Cadmium inner coil & contacts ensure your solenoid operates safely in any harsh environment and can withstand high current
EXCEPTIONAL PARTS, REMARKABLE JOURNEY

EXCEPTIONAL PARTS, REMARKABLE JOURNEY

Enjoy your seamless journey with the support of our replacement parts.
Brand Model Number
Replaces parts #8N11450, 8N-11450, SW218, SW355, 10-FO218-12V, SFD6025, 10-FO218-12V, 7-1023-12V, 240-14008, 66-219
Solenoid type 3 Terminal
Voltage 12V
Manufacturer
‎BlueStars
Brand
‎BlueStars
Model
‎Starter Solenoid
Item Weight
‎10.9 ounces
Package Dimensions
‎6.1 x 3.62 x 2.99 inches
Manufacturer Part Number
‎SFD6025

FAQ

This starter solenoid is designed for Ford 2N, 8N, and 9N tractors equipped with a 12-volt electrical system and a 3-terminal starter relay setup. It fits 4-cylinder Ford farm tractor applications, specifically the 9N (1939-1943), 2N (1942-1947), and 8N (1947-1952). Since many of these tractors were originally 6V, please verify that your tractor has been converted to 12V or already utilizes a 12V solenoid before ordering.
This unit replaces SFD6025, 8N-11450, 8N11450, SW218, SW355, 10-FO218-12V, 7-1023-12V, 240-14008, 7-1023, 12840, U938, XR-2033, 6650-1023, 66-219, 8300-1, and 1023. Ensure you match both the part number and the 12V 3-terminal configuration on your tractor prior to installation.
Common symptoms include a single click without the engine cranking, no audible click when the starter button is pressed, intermittent starting, or voltage reaching the small trigger terminal without the solenoid closing the high-current contacts. If the tractor cranks only when the two large terminals are jumped manually, this typically indicates a failed solenoid or an issue within the control circuit.
Before replacing the solenoid, inspect the battery state of charge, the condition of the battery cables, ground connections, the starter switch or push-button circuit, and the large cables running from the battery to the solenoid and from the solenoid to the starter. Corroded terminals, weak grounds, and damaged or undersized battery cables often mimic the symptoms of a failed relay. Additionally, confirm that your tractor requires a 12V unit, as 2N, 8N, and 9N tractors may be in their original 6V configuration or a converted 12V state.
Installation is straightforward provided the wiring is accessible. You will typically need basic wrenches or sockets for the mounting hardware and cable nuts. We recommend taking a photo or marking the wire positions before removal to ensure correct reinstallation. Always disconnect the battery first, transfer the wires one at a time, and tighten the terminals securely without over-stressing the studs. The process generally takes 15 to 30 minutes.
Failures are most commonly caused by burned or pitted internal contacts resulting from repeated high-current starts, terminal corrosion, moisture exposure, poor grounding, and heat generated by resistance in aging battery cables. On vintage tractors, long-term vibration and wiring modifications from 6V-to-12V conversions can also lead to premature solenoid failure or inconsistent relay operation.
Yes. This is a 3-terminal, 12-volt starter solenoid, so your tractor's wiring must match this terminal count and system voltage. Do not assume all Ford N-series solenoids are identical, as both 6V and 12V versions exist for these applications. Always compare your existing relay's terminal layout, mounting style, and stamped part number before proceeding with installation.