Garden Parts [Lifetime Warranty] 045898 Ignition Starter Switch - Compatible with Hustler Exmark Lazer Z Super Z Mini Z Hydro Walk Behind Mini - Replaces Husqvarna 532158913 Toro 1-543070 Bobcat 128010 AYP 158913
045898 ignition starter switch with keys for Hustler, Exmark, and compatible lawn mower equipment.
045898 ignition starter switch with keys and dimensional measurement diagram for lawn mower compatibility.
045898 ignition starter switch for lawn mowers shown in a promotional graphic with a person mowing the lawn.
Close-up of 045898 ignition starter switch showing 5 terminals and 7 poles with labeled connection points.
045898 ignition starter switch with keys and compatible Exmark zero-turn mower shown on informational product graphic.
045898 ignition starter switch with key for Hustler, Exmark, and lawn mower equipment.
045898 ignition starter switch showing brass terminals, aluminum housing, and two included keys.
Compatibility chart for 045898 ignition starter switch listing replacement part numbers and mower deck fitment.
045898 ignition starter switch installation guide showing a key inserted into a mower ignition panel.
045898 ignition starter switch with keys for Hustler, Exmark, and compatible lawn mower equipment.
045898 ignition starter switch with keys and dimensional measurement diagram for lawn mower compatibility.
045898 ignition starter switch for lawn mowers shown in a promotional graphic with a person mowing the lawn.
Close-up of 045898 ignition starter switch showing 5 terminals and 7 poles with labeled connection points.
045898 ignition starter switch with keys and compatible Exmark zero-turn mower shown on informational product graphic.
045898 ignition starter switch with key for Hustler, Exmark, and lawn mower equipment.
045898 ignition starter switch showing brass terminals, aluminum housing, and two included keys.
Compatibility chart for 045898 ignition starter switch listing replacement part numbers and mower deck fitment.
045898 ignition starter switch installation guide showing a key inserted into a mower ignition panel.
Lifetime Warranty

[Lifetime Warranty] 045898 Ignition Starter Switch - Compatible with Hustler Exmark Lazer Z Super Z Mini Z Hydro Walk Behind Mini - Replaces Husqvarna 532158913 Toro 1-543070 Bobcat 128010 AYP 158913

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045898 Ignition Starter Switch

Key Features

  • Direct-fit replacement for specified OEM part numbers.
  • Features 3 positions and 5 electrical terminals for full-function operation.
  • Constructed from durable materials for longevity.
  • Includes keys for immediate installation and use.

Replaces / Cross-Reference Part Numbers

  • 045898
  • 532158913
  • 158913
  • 1-543070
  • 128010
  • 430-173
  • 1754250P

Compatibility & Fitment

  • Hustler Zero Turn Mower Models: Raptor, Raptor SD, FasTrak, X-One, Super Z
  • Troy-Bilt Lawn Tractor Models: 13025, 13026, 13027, 13028

When to Replace

  • Engine fails to crank or start when the key is turned.
  • Intermittent or complete loss of electrical power to the dashboard or accessories.
  • The key is difficult to insert, turn, or remove from the switch.
  • Mower shuts off unexpectedly during operation without stalling.

Installation Tips

  • Disconnect the negative battery terminal before beginning work.
  • Photograph or label the wire placement on the old switch before disconnecting.
  • Ensure each wire is connected firmly to the correct terminal on the new switch.
  • Confirm the switch is securely mounted to the dash panel to prevent vibration damage.
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  • FIXING SYMPTOMS

    FIXING SYMPTOMS

    Engine won't start | No power to starter | Key won’t turn or feels loose | Engine dies when releasing key
  • DURABLE MATERIAL

    DURABLE MATERIAL

    This part is made of lightweight and robust aluminum alloy which is flame-retardant, enhancing durability
  • BEST SOLUTION

    BEST SOLUTION

    Enjoy the great feeling when your tractor is repaired and works like before - BlueStars brings DIY solutions to help you deal with any trouble
  • IMPORTANT NOTE

    IMPORTANT NOTE

    This is a replacement part designed to be compatible with certain appliances. Any brand names mentioned are used solely to indicate compatibility
Enjoy your fresh garden with the support of our replacement part!

Enjoy your fresh garden with the support of our replacement part!

Brand Model Number
Exmark 1-543070, 543070, Lazer Z (Serial 102000-370000, 52/60/72 Deck), Turf Tracer Floating Deck Walk Behinds (Serial 190000+, Without ECS, 52/60 Deck)
Toro 1-543070, 543070, 74269 (72 Deck)
AYP 158913, Vanguard engines
Husqvarna 532158913, 532144921, 128010, LZ (52/60/72 Deck)
Troy-Bilt 1754250P, 13025, 13026, 13027, 13028
Hustler / Big Dog Super Z, Mini Z, Hydro Walk Behind, XR7, X-ONE, Z4, Mini FasTrak, FasTrak Sport, 2002-2007 Models, 52 Deck, 60 Deck, 72 Deck, Excluding XR-7 Deck Drive Unit
Bobcat ZT200, 942200-942299 Riders (61 Deck), 930000-936406A Power Units, Hydro Drives

FAQ

This switch is commonly used on select Hustler and Exmark zero-turn and walk-behind mowers, including applications listed for Exmark Lazer Z, Super Z, Mini Z, and Hydro Walk Behind models. Cross-brand replacements shown for this switch family also include Husqvarna, Toro, Bobcat, AYP, Roper, Sears, Troy-Bilt, John Deere, and Big Dog applications. Because ignition switches can vary by terminal layout and wiring, match your original part number and verify the terminal/pole configuration before ordering.
Known replacement and cross-reference numbers for this switch include 045898, 532158913, 1-543070, 543070, 128010, 158913, 1754250P, 102972X, 145499, 530158913, 532102972, 532145499, AM119111, 490066, and 493625. The safest match is to compare both the part number on your original switch and the terminal arrangement.
Common symptoms include the engine not cranking when the key is turned, intermittent starting, accessories or dash power cutting in and out, a key that feels loose in the switch, or a mower that only starts when the key is held in a certain position. Before replacing the switch, also check the battery charge, fuse, starter solenoid, seat and brake safety switches, and cable connections, since those can cause similar no-start symptoms.
This switch family is commonly described as a 5-terminal, 7-pole ignition starter switch. That makes terminal count and wiring layout especially important. Even if two switches look similar from the front, the wrong terminal arrangement can prevent starting or cause electrical issues. Compare the back of your old switch, note the wire positions, and confirm your mower uses the same 5-terminal/7-pole setup.
For most mowers, replacement is a straightforward repair that usually takes about 15 to 30 minutes. Typical tools include a wrench or socket to disconnect the battery, pliers or a nut driver/socket for the retaining nut, and possibly masking tape or a phone camera to label wire positions before removal. Disconnect the negative battery cable first, transfer one wire at a time or document their locations carefully, then reinstall and test all key positions.
The most common causes are moisture intrusion, corrosion at the terminals, vibration from mower use, worn internal contacts from repeated starts, and overheating from poor electrical connections. Outdoor equipment that sits uncovered or is washed aggressively around the dash area is especially prone to switch corrosion. If the old switch shows heat damage or melted terminals, inspect the wiring harness and connector ends before installing the new switch.