If you already know your part number, browse all available options in our Exmark PTO clutch collection to find a direct replacement.
Exmark zero-turn, stand-on, and commercial walk-behind mowers rely on electric PTO clutches to engage the mower deck and drive the blades. When the clutch begins slipping, overheating, or failing to engage, cutting performance drops fast. This guide covers common Exmark PTO clutch applications and helps you identify the correct replacement by part number and mower platform.
Exmark Lazer Z, Radius, Quest, Navigator & Vantage PTO Clutch Applications
Exmark electric PTO clutches are used across commercial and residential mower lines including Lazer Z, Radius, Quest, Navigator, and Vantage stand-on models. These electromagnetic clutches mount to the engine crankshaft and engage the mower deck belt when the PTO switch is activated.
If the clutch begins slipping, making noise, or fails to engage the blades, replacement is usually the most reliable fix. Common Exmark PTO clutch replacement part numbers include 103-0665, 103-3245, 109-7665, 103-0690, and 105-2635.
The most accurate way to confirm fitment is to match the OEM part number stamped on your original clutch. This ensures the correct pulley diameter, crankshaft bore, and engagement characteristics for your specific Exmark mower.
What Are the Signs of a Failing Exmark PTO Clutch?
A failing electric PTO clutch usually shows warning signs before complete failure. If your mower blades fail to engage, disengage inconsistently, or stop under load, the clutch is one of the first components to inspect.
- Blades will not engage when the PTO switch is turned on
- Intermittent engagement or inconsistent blade operation
- Burning smell or excessive heat near the clutch assembly
- Squealing or grinding noises caused by worn bearings
- Blades stop under load in thick or wet grass
- Electrical issues or blown fuse caused by coil failure
If these symptoms appear, replacing the PTO clutch assembly will usually restore proper blade engagement and dependable mowing performance.
Popular Exmark PTO Clutch Replacements
The following PTO clutch part numbers are commonly used across Exmark mower platforms. Select your part number below to view detailed fitment and replacement options:
- 103-0665 PTO Clutch for Exmark Lazer Z and Toro Z Master models. One of the most common commercial clutch replacements.
- 103-3245 PTO Clutch for Exmark Lazer Z and Toro Z Master platforms. Reliable replacement for mid and heavy-duty commercial units.
- 109-7665 PTO Clutch for Exmark and Toro commercial mower platforms. Updated replacement for multiple 103-series configurations.
- 103-0690 PTO Clutch for Exmark Radius, Quest, and Toro crossover models. Common across newer residential and light commercial units.
- 105-2635 PTO Clutch for Exmark Vantage and Toro GrandStand stand-on mowers. Designed for compact commercial applications.
Many Exmark models share PTO clutch configurations with Toro platforms due to shared engineering across both brands. Always confirm using the OEM number stamped on your original clutch.
How to Find the Right Exmark PTO Clutch Replacement
Start by locating the part number stamped on your original clutch. This is the fastest way to ensure correct fitment. Once identified, compare against the product links above or browse the full Exmark PTO clutch collection.
If your mower is part of the Lazer Z platform, start with the 103-0665 PTO clutch. For similar commercial units, review the 103-3245 PTO clutch or 109-7665 PTO clutch.
For Radius and Quest models, check the 103-0690 PTO clutch. For Vantage and stand-on applications, confirm fitment with the 105-2635 PTO clutch.
Find the Right Exmark PTO Clutch Replacement
The most accurate way to select the correct replacement is by matching the OEM number on your original clutch. You can also browse the complete Exmark PTO clutch collection to compare specifications and available options.
PTO Direct USA supplies OEM-spec electric PTO clutch replacements for Exmark, Toro, Scag, Gravely, and more. View the full PTO clutch catalog to find the correct replacement for your mower.