Exmark 146-3245 Oil Change Kit for Kohler ZT KT 710-740 Quest Radius S-Series Pioneer E-Series 10W50

What It Is

This Exmark 146-3245 Oil Change Kit provides the correct 10W50 oil and filter for routine maintenance on Kohler KT/ZT 710-740 engines found in Exmark Quest, Radius, S-Series, and Pioneer E-Series mowers. It’s a factory-recommended kit for mower owners who want a single-purchase, no-guess solution for oil changes.

Fitment & Compatibility

• Engine fit: Kohler KT710, KT720, KT725, KT730, KT735, KT740, ZT710, ZT720, ZT725, ZT730, ZT735, ZT740 — not for Kawasaki or Briggs & Stratton engines.
• Mower models: Exmark Quest, Radius, S-Series, Pioneer E-Series. Not for Lazer, Turf Tracer, or other Exmark lines.
• Deck size: No deck-size restriction — compatibility is determined by engine model, not mower deck.
• Check before buying: Locate your engine model number (stamped on valve cover or blower housing). Verify it starts with KT or ZT followed by 710-740. If your engine model doesn’t match, this kit won’t fit.
• OEM vs aftermarket: This is an Exmark-branded kit with Exmark oil and filter. Aftermarket alternatives (e.g., Kohler branded) may be cheaper but should match SAE 10W50 viscosity and filter thread/pressure specs.

Key Things to Know

• Oil quantity: Kit includes 2 quarts (64 oz) — typical capacity for these engines is ~1.5–1.8 quarts. You’ll have a small amount left over.
• Filter included: One OEM Exmark oil filter (cross-references to Kohler 12 050 01-S). Verify your engine uses a spin-on filter, not a cartridge.
• Installation difficulty: Easy (beginner-level). Requires basic tools: socket wrench, oil drain pan, funnel. No special skills needed.
• Common gotcha: The 10W50 oil is not universal — it’s specifically for air-cooled Kohler Command/Confidant engines. Don’t use this in Kawasaki or Briggs engines, or in liquid-cooled mowers.

Should You Buy It

Buy this kit if you own an Exmark with a Kohler KT/ZT 710-740 engine and want a hassle-free, OEM-approved oil change with no guesswork. If you have a different engine brand or model, skip it — the oil and filter won’t match. For experienced DIYers, buying separate 10W50 oil and a compatible filter may save a few dollars, but this kit is convenient and ensures correct viscosity and filter fit.