For the L110 covered by John Deere operator’s manual OMGX21647 K3, the engine is a 17.5 hp Kohler CV491 and the drive is a hydrostatic Tuff Torq K46. Deere also publishes a parts guide for an L110 with a 42-inch mower deck. Those documents give a useful starting point, but a used tractor may have a replacement engine or deck. Check its identification numbers before ordering parts or judging a seller’s specification sheet.
John Deere L110 specifications
| Engine | Kohler CV491, one cylinder, 490 cc, 17.5 hp |
|---|---|
| Transmission | Hydrostatic Tuff Torq K46 |
| Travel speed | Up to 5.7 mph forward; up to 3.4 mph in reverse |
| Fuel capacity | 2.1 US gallons |
| Documented mower deck | 42 inches, two blades |
| Approximate cutting height | 1 to 4 inches |
Identify the tractor, engine and deck first
Record the tractor’s product identification number (PIN), engine serial number and mower deck serial number, as Deere’s product identification instructions request. Read the width or model marking on the attached deck rather than assuming every L110 has the same equipment. Use those identifiers when checking a manual, belt, blade, filter or bagger listing.
The engine claim is particularly easy to mix up with other L-series models: the same Deere manual lists the L100 separately with a 17 hp Briggs & Stratton engine and a five-speed gear transaxle. Its L110 specification is the Kohler-powered hydrostatic model shown above. A badge or an online listing alone is a poor basis for choosing engine parts.
What the controls do
Deere’s operating instructions show separate forward and reverse foot pedals for the automatic L110, a mechanical PTO lever for the mower, an hour meter with a service reminder, and a forward-only cruise-control lever. The cutting-height lever has marked settings from approximately 1 to 4 inches; the highest position is also used for transport. Do not use cruise control downhill. Disengage the mower and check behind the tractor before reversing.
Check a used L110 before buying
- Confirm identity. Compare the tractor PIN, engine marking and deck details with the applicable Deere manual and parts catalog. Ask whether the engine or deck has been replaced.
- Review hours and records. The service reminder displays operating hours, but Deere warns that hours continue to accumulate if the key is left out of STOP. Compare the display with dated maintenance records and the machine’s condition.
- Inspect the machine while stopped. Look for leaks, debris around the engine air intake, damaged belts, corrosion or cracks in the deck, and missing guards. Check tire condition and pressure against the manual.
- Check the drive on level ground. With the owner operating the tractor in a clear area, observe forward and reverse response and the parking brake. The cited manual’s L110 is hydrostatic; it should not be described as a five-speed gear model.
- Check the mower and safety systems. Deere gives procedures for the brake, PTO, seat and reverse interlocks. If an interlock fails its prescribed check, do not operate the tractor until it is serviced.
- Look at the cut, not just the deck width. Uneven tire pressure, a damaged blade or an out-of-level deck can change the result. Deere’s leveling procedure calls for the outer blade tips to be within 1/8 inch side to side and the front tip to sit 1/8 to 1/4 inch below the rear tip. Follow the full procedure in the manual before making adjustments.
Hold the purchase if a safety test fails or the tractor behaves differently from the manual for its PIN until the cause is identified. Stop the engine, remove the key and wait for moving parts to stop before inspecting beneath the mower. For blade or deck work, Deere also instructs owners to disconnect the spark plug wire or battery negative cable and wear gloves.
Routine care and compatible equipment
Before each use, Deere calls for checking the safety systems, tire pressure, fuel and engine oil; clearing debris from the air intake and engine area; and looking for leaks. The L110 service reminder tracks operating hours, but the maintenance timetable under the seat and the manual for the specific tractor should govern service intervals. A single interval copied from another L-series article may be wrong for the installed engine or equipment.
If you want to mulch, collect clippings or add another attachment, start with the tractor PIN and the installed deck. Deere’s 42-inch L110 parts guide identifies service components for that configuration, while the operator’s manual directs owners to use approved optional equipment and the instructions supplied with each attachment. Check the attachment’s mounting parts and any ballast requirements before buying. Do not infer a towing limit or a safe slope angle from the L110’s horsepower.
If the tractor is hard to start or loses power
Use the Deere troubleshooting chart for the matching machine before replacing parts. For hard starting, it points to fuel condition and supply, the fuel filter, spark plug and electrical connections among possible causes. For low engine power, it lists a dirty air cleaner, faulty plug, overheating, excessive travel speed and improper fuel. A slipping mower belt calls for checking debris in the sheaves, belt wear and tension. These are possible causes, not a diagnosis from a symptom alone.
One behavior can look like a fault to a new owner: with the mower engaged, pressing the reverse pedal stops the mower and engine under the normal reverse safety system. Deere discourages mowing in reverse and gives a separate Reverse Implement Option procedure for limited circumstances. Check the manual before treating a reverse shutdown as a starting or transmission problem.