How to Pick the Right Starter for Your Toro Workman 3100 or Groundsmaster 120

Author : Danny walker | Published On : 15 Sep 2026

If your Toro is cranking slow, clicking, or not starting at all, the starter motor is usually the first suspect. This guide covers the Toro with Kohler Engine 1994–2002 UTV Riding Mower Starter from Denparts — a 12-volt, direct-drive replacement built for specific Workman and Groundsmaster models.

The starter turns battery power into the spin needed to get your engine running. When you turn the key, its pinion gear engages the flywheel and cranks the engine until it starts on its own. Warning signs include clicking, weak cranking, intermittent starts, or the starter spinning without turning the engine over — though a weak battery or corroded terminals can cause the same symptoms.

This part fits the Toro Workman 3100 (1994–2001) with a Kohler 23 HP engine, and the Toro Groundsmaster 120 (1996–2002) with a Kohler 20 HP engine. It's not a universal fit, so confirm your model and year before ordering.

For cross-checking your old starter, this unit references numbers from John Deere, Kohler, Lucas, Nippondenso, New Holland, and Remy Small Motor. Treat these as a starting point, and compare your original part's specs before buying.

Specs: 12V, 0.6 kW, counterclockwise rotation, 9-tooth drive, a 28.8 mm pinion diameter, and two 8.5 mm mounting holes. Roughly 7.8 lb. Getting any of these wrong — rotation, teeth, or mounting — means the starter won't seat or engage properly.

Before installing, disconnect the battery, compare old and new side by side, check for corrosion, and mount everything to spec.

Bottom line: matching the word "Toro" isn't enough. Confirm your model, year, engine, starter number, and mounting details first — the Denparts.ca  team can help you verify fitment before you order.