Lawn Mower 175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120
175566 Ignition Switch & AM138068 Starter Solenoid, front view with two keys and solenoid
175566 Ignition Switch, dimension diagram showing 2-inch height, 2-inch diameter, and 1.5-inch base
AM138068 Starter Solenoid, product views with terminal, electrical specification, and dimension diagrams
175566 Ignition Switch & AM138068 Starter Solenoid, switch shown with 7 terminals and 4 positions
AM138068 Starter Solenoid shown with copper wire coil graphic, two terminals, mounting bracket, and 180°C copper coil text
175566 Ignition Switch, rugged construction infographic showing ABS housing, copper terminals, and precision-fit keys
175566 Ignition Switch & AM138068 Starter Solenoid installation guide showing three switch replacement steps
175566 Ignition Switch 7 Terminals 2 Keys, switch with two keys beside a compatible models list
AM138068 Starter Solenoid compatible models chart with solenoid product photo
175566 Ignition Switch & AM138068 Starter Solenoid shown with keys beside a green John Deere riding mower
175566 Ignition Switch & AM138068 Starter Solenoid, product display showing the solenoid from four angles
AM138068 Starter Solenoid wiring diagram showing battery, fuse, key switch, motor/starter, and ground connections
175566 Ignition Switch, marketing graphic showing a riding mower and ignition switch close-up
175566 Ignition Switch & AM138068 Starter Solenoid, front view with two keys and solenoid
175566 Ignition Switch, dimension diagram showing 2-inch height, 2-inch diameter, and 1.5-inch base
AM138068 Starter Solenoid, product views with terminal, electrical specification, and dimension diagrams
175566 Ignition Switch & AM138068 Starter Solenoid, switch shown with 7 terminals and 4 positions
AM138068 Starter Solenoid shown with copper wire coil graphic, two terminals, mounting bracket, and 180°C copper coil text
175566 Ignition Switch, rugged construction infographic showing ABS housing, copper terminals, and precision-fit keys
175566 Ignition Switch & AM138068 Starter Solenoid installation guide showing three switch replacement steps
175566 Ignition Switch 7 Terminals 2 Keys, switch with two keys beside a compatible models list
AM138068 Starter Solenoid compatible models chart with solenoid product photo
175566 Ignition Switch & AM138068 Starter Solenoid shown with keys beside a green John Deere riding mower
175566 Ignition Switch & AM138068 Starter Solenoid, product display showing the solenoid from four angles
AM138068 Starter Solenoid wiring diagram showing battery, fuse, key switch, motor/starter, and ground connections
175566 Ignition Switch, marketing graphic showing a riding mower and ignition switch close-up

175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120

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175566 Ignition Switch & AM138068 Starter Solenoid

Key Features

  • Replacement set includes one 175566 ignition switch with 7 terminals and two keys, plus one AM138068 starter solenoid.
  • The ignition switch provides four control positions, including a headlight control setting.
  • The switch has a durable ABS plastic housing, copper terminals, and keys designed for smooth rotation and secure engagement.
  • The starter solenoid uses internal 180°C copper windings for reliable electrical actuation.

Replaces / Cross-Reference Part Numbers

  • Ignition Switch: 175566, 532175566, 163968, 175442, 539107541, 725-1741, 94762, GY20074, 33-376, 6900-47P
  • Starter Solenoid: AM138068, GY22476, AUC15346, 725-04439, 725-04439A, 725-04439B, 862-1211-211-16

Compatibility & Fitment

The 175566 ignition switch is listed for a range of lawn tractors, including Husqvarna YTH1542XP, YTH1848XP, LTH1342, and LTH1342A. The ignition switch and AM138068 starter solenoid share fitment on these John Deere models:

  • L100, L105, L107, L108, L110, L111, L118, L120, and L130
  • LA100, LA105, LA110, and LA115

Fitment may vary by production year, engine, and wiring configuration. Compare the original parts and terminal layout before installation. Part/model reference: 175566 AM138068.

When to Replace

Replace the ignition switch when the key does not consistently crank or run the engine, the headlight position fails, terminals show corrosion, or the switch causes intermittent electrical operation. Replace the starter solenoid when the starter does not engage despite a charged battery and a functioning ignition circuit, or when the solenoid clicks without delivering power to the starter.

Installation Tips

  • Disconnect the battery negative (-) terminal before removing either part to prevent accidental short circuits.
  • Photograph or label each wire and follow the tractor wiring diagram. Match every wire to the correct terminal; reverse polarity, overload, short circuits, and poor connections can damage the parts.
  • Inspect connectors and copper strands for corrosion or looseness, and insulate exposed strands before reconnecting.
  • Install the switch and solenoid in the original mounting positions, reconnect the battery, and test starting and headlight operation.
  • Replacement normally takes a few minutes when the wiring and mounting hardware are accessible.
175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120 1
175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120 2
175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120 3
175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120 4
175566 Ignition Switch & AM138068 Starter Solenoid - Fits John Deere L100, L105, L110, L120 5
175566 IGNITION SWITCH

175566 IGNITION SWITCH

7 Terminals | 4 Positions | With headlight control settings
- Function: Controls the mower’s electrical system, enabling starting and operational functions
- Replaces part numbers:
AYP/ Craftsman 163968, 175442, 175566, 532175566, 583068901; MTD/ Cub Cadet 725-1741, 925-1741, 925-04227B, 925-04227A, 725-04227A, 725-04227B; Husqvarna 532163968, 532175566, 539107541; J-Deere GY20074; Murray 94762, 94762MA, 94762MAX; Poulan 163968, 175442, 175566

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This set is compatible with John Deere L100, L105, L110, and L120 lawn tractors. Confirm the original switch and solenoid connectors and part numbers before installation, especially on machines with model-year variations.
The 7-terminal ignition switch replaces or cross-references GY20074, 925-1741, 94762, 175566, 175442, 725-04439, and 725-04439B. The starter solenoid is identified by part number AM138068.
Common symptoms include no response when the key is turned, an intermittent start condition, a single click without starter engagement, or a starter that will not disengage. Check the battery, ground connections, fuses, and wiring before replacing either component.
The ignition switch uses seven electrical terminals to handle the mower's starting, ignition, accessory, safety-interlock, and engine-shutoff circuits. Match each wire to the corresponding terminal on the original switch rather than relying only on wire color, and disconnect the battery before moving the wiring.
Remove the negative battery cable, inspect the wiring for corrosion or loose terminals, and verify that the battery has a full charge. Clean the solenoid mounting and ground surfaces as needed, and photograph or label the original switch connections before removal.
Installation is generally a basic electrical repair and usually takes about 30 to 60 minutes. A socket set or wrench, screwdriver, pliers, and a phone or labeling materials for documenting wire positions are typically sufficient. Route the wiring away from moving or hot components after installation.