Garden / Lawn Mowers
Toro 22in Recycler Lawn Mower 20337 Operator's Manual
Quick guide for the Toro 22in Recycler Lawn Mower (Model 20337). Includes assembly, operation, maintenance schedules, oil and fuel requirements, and safety instructions.
Quick answers from the manual
Quick answer
- The Toro 22in Recycler Lawn Mower (20337) is a residential walk-behind mower. Key maintenance includes changing the oil after the first 5 hours and then yearly, and using fresh, unleaded gasoline (max 10% ethanol). p. 1, 13
Key actions
- Change engine oil p. 14, 15
- Adjust cutting height p. 9
- Replace blade p. 15
First start
- Remove protective plastic from engine, install handle, fill with oil, and add fresh fuel. p. 5, 6, 8
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Problems and fixes
Engine vibrates
Stop engine, inspect for damage.
p. 2, 12Maintenance and reset
- Change oil after first 5 hours, then yearly. p. 13
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Oil Capacity | 0.55 L | Max fill | p. 6, 15 |
| Blade Bolt Torque | 82 N-m | Tightening torque | p. 15 |
| Spark Plug Torque | 20 N-m | Tightening torque | p. 17 |
Where to find it in the PDF
- Operation p. 8, 9, 10, 11
- Maintenance p. 13, 14, 15, 16
- Warranty p. 20
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides essential instructions for the safe operation and maintenance of the Toro 22in Recycler Lawn Mower (Model 20337). Before starting, ensure you have read all safety warnings, filled the engine with the provided oil, and checked that all fasteners are tight. Always clear the lawn of debris before mowing and wear appropriate footwear.
Setup and Assembly
Installing the Handle: Remove handle knobs, move the handle to the operating position, and reinstall the knobs. Ensure cables are routed to the outside of the handle knobs.
Recoil-Starter Rope: Hold the blade-control bar to the upper handle and pull the recoil-starter rope through the rope guide on the handle.
Filling with Oil: The machine comes with a bottle of oil. Use SAE 30 detergent oil (API SF, SG, SH, SJ, SL or higher). Max fill is 0.55 L (18.6 oz). Check the level using the dipstick on a level surface.
Grass Bag: Slip the bag over the frame, hooking the bottom channel first, then the top and side channels.
Operation
Fueling: Use clean, fresh unleaded gasoline (87 octane or higher) with no more than 10% ethanol. Do not use gasoline containing methanol or E15/E85 blends.
Starting: Hold the blade-control bar against the handle, then pull the recoil-start handle until resistance is felt, then pull sharply.
Cutting Height: Adjust using the levers on the wheels. Settings range from 25 mm (1 inch) to 102 mm (4 inches). Ensure front and rear wheels are set to the same height.
Recycling vs. Bagging: Use the bag-on-demand lever to switch between recycling (mulching) and bagging. Ensure the discharge area is clear of debris before switching.
Maintenance
Schedule: Change engine oil after the first 5 hours, then yearly. Service the air cleaner yearly. Check oil level before each use.
Blade Replacement: If the blade is damaged or dull, replace it. Use a torque wrench to tighten the blade bolt to 82 N-m (60 ft-lb).
Cleaning: Use the washout port by attaching a garden hose, starting the engine, and running water until clippings are cleared.
Storage
Preparation: Run the engine until it stops from lack of fuel. Add fuel stabilizer to the last tank of the season. Remove the spark plug, add 30 ml of oil to the cylinder, and pull the starter rope slowly to distribute oil.
Practical help
Common problems
Engine will not start
Check fuel level (use fresh fuel <30 days old), ensure spark plug wire is connected, and check oil level.
Machine vibrates abnormally
Stop the engine immediately, disconnect the spark plug wire, and inspect the blade and machine for damage or foreign objects.
Grass bag not collecting clippings
Check that the bag-on-demand lever is in the bagging position and clear any debris from the discharge opening.
Engine stalls in tall grass
Mow at the highest cutting-height setting and walk slower; mow again at a lower setting if necessary.
Before use
- Check engine oil level
- Check fuel level (fresh, unleaded, <10% ethanol)
- Clear lawn of sticks, stones, and debris
- Ensure all guards and safety devices are in place
- Check blade condition
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Specs in practice
- Oil Capacity
- 0.55 L (18.6 oz) max fill
- Fuel Requirements
- Unleaded, 87 octane or higher, max 10% ethanol
- Blade Bolt Torque
- 82 N-m (60 ft-lb)
- Spark Plug Torque
- 20 N-m (15 ft-lb)
Images and diagrams
- Figure 1: Location of model and serial number plate
- Figure 9: Product overview identifying all controls
- Figure 12: Cutting height adjustment levers
- Figure 26: Self-propel cable adjustment knob
Model compatibility
- Use only Toro genuine parts for replacements
- Not designed for cutting brush or agricultural use
- Do not use gasoline with >10% ethanol (E15, E20, E85)
Manual page author
Emily Carter
User documentation editor