Toro · walk-behind mower
Toro20339
Toro 20339 — 22 in. SMARTSTOW Variable Speed High Wheel Mower
A 22 in. front-wheel-drive walk-behind mower with Toro’s SMARTSTOW fold-and-store handle and a variable speed self-propel system, powered by a Briggs & Stratton EXi of 163 cc. It shares its engine size and cutting width with the 20334 but drives the other end of the machine — which is why the two take different drive belts, a difference no amount of matching the specification will reveal.
- Cutting width
- 22 in.
- Production runs
- 9
- Parts listed
- 11
At a glance
Your serial number decides some of these parts
Toro publishes 9 separate parts listings for this model number. They are not identical.
- 314000001–314999999Toro publishes a separate parts listing for this range. We have not opened it.
- 315000001–315999999Toro publishes a separate parts listing for this range. We have not opened it.
- 316000001–316999999Verified. Toro lists engine maintenance kit 20234 and drive belt 38990 for this range.
- 400000000–401999999Verified. The maintenance kit has changed to 130-8148. Belt 38990 carries over, and 137-4837P (Replacement 11 in. Rear High Wheel) is added.
- 402000000–403599999Toro publishes a separate parts listing for this range. We have not opened it.
- 403600000–404319999Toro publishes a separate parts listing for this range. We have not opened it.
- 404320000–405699999Toro publishes a separate parts listing for this range. We have not opened it.
- 405700000–407819999Toro publishes a separate parts listing for this range. We have not opened it.
- 407820000–999999999Toro publishes a separate parts listing for this range. We have not opened it.
Identification
Where the numbers are on this machine
On the housing — top rear, back rear, left side, or right side — or on the underside of the control panel. On this model the serial number decides which engine maintenance kit Toro lists for your machine.
Parts
Parts for this mower
Mower blades
- 59534P22 Inch Recycler BladeConfirmed fit
Listed by Toro as the 22 Inch Recycler Blade on its official parts pages for model 20339 under both serial ranges we verified.
Engine maintenance kits
Which engine maintenance kits fits the 20339?- 20234Engine Maintenance Kit for Briggs & Stratton EngineConfirmed fit
Serial 316000001–316999999: Listed by Toro as the Engine Maintenance Kit for Briggs & Stratton Engine on its official parts page for model 20339, serial range 316000001–316999999.
- 130-8148Briggs & Stratton EXi Engine Maintenance Kit ReplacementConfirmed fit
Serial 400000000–401999999: Listed by Toro as the Briggs & Stratton EXi Engine Maintenance Kit Replacement on its official parts page for model 20339, serial range 400000000–401999999.
- 20234Engine Maintenance Kit for Briggs & Stratton EngineNot verified
Serial 400000000–401999999: Toro does not list kit 20234 on its parts page for model 20339, serial range 400000000–401999999; that range shows kit 130-8148 instead.
- 130-8148Briggs & Stratton EXi Engine Maintenance Kit ReplacementNot verified
Serial 316000001–316999999: Toro does not list kit 130-8148 on its parts page for model 20339, serial range 316000001–316999999; that range shows kit 20234 instead.
Drive belts
Which drive belts fits the 20339?- 3899022 Inch Drive Belt for Recycler MowerConfirmed fit
Listed by Toro as the 22 Inch Drive Belt for Recycler Mower on its official parts pages for model 20339 under both serial ranges we verified. Note this is 38990, not the 38991 Toro lists for the rear-wheel-drive 20334.
Wheels and drive gears
- 59502Replacement Front Wheel Drive Internal GearConfirmed fit
Listed by Toro as the Replacement Front Wheel Drive Internal Gear on its official parts pages for model 20339 under both serial ranges we verified, including the 400-series range from which it is absent on the 20334.
- 137-4837PReplacement 11 in. Rear High Wheel for Push and Front Wheel Drive Lawn MowersConfirmed fit
Serial 400000000–401999999: Listed by Toro as the Replacement 11 in. Rear High Wheel for Push and Front Wheel Drive Lawn Mowers on its official parts page for model 20339, serial range 400000000–401999999.
- 137-4837PReplacement 11 in. Rear High Wheel for Push and Front Wheel Drive Lawn MowersNot verified
Serial 316000001–316999999: Toro does not list rear high wheel 137-4837P on its parts page for model 20339, serial range 316000001–316999999. We have not found a primary source stating whether it fits that range.
Covers and storage
- 490-2012Smart Stow CoverConfirmed fit
Listed by Toro as the Smart Stow Cover on its official parts pages for model 20339 under both serial ranges we verified.
Fuel treatment
- 130-2393Premium Fuel Treatment (0.5 oz.)Confirmed fit
Listed by Toro on its official parts pages for model 20339 under both serial ranges we verified. This is a fuel treatment rather than a fitted part.
Provenance
Sources
Last verified against these sources on August 17, 2026.
- 1
22" (56cm) SMARTSTOW Variable Speed High Wheel Lawn Mower — model 20339
The Toro Company · Primary source · Accessed August 17, 2026
Product specification page. States "7.25 ft-lb Gross Torque** Briggs & Stratton® EXi 163cc w/Ready Start®", a 22 in / 56 cm cutting width, front-wheel drive with a variable speed self-propel system, and a 14 Gauge Steel deck.
- 2
The Toro Company · Primary source · Accessed August 17, 2026
Lists 20234 (Engine Maintenance Kit for Briggs & Stratton Engine), 38990 (22 Inch Drive Belt for Recycler Mower), 59534P, 59502 and 490-2012. The range selector names eight further serial ranges for this model number.
- 3
The Toro Company · Primary source · Accessed August 17, 2026
Lists 130-8148 in place of 20234, and adds 137-4837P (Replacement 11 in. Rear High Wheel). Still lists 38990 and 59502.
- 4
Find Your Toro Model & Serial Number Plate
The Toro Company · Primary source · Accessed August 16, 2026
Lists the plate locations for walk power mowers: housing top rear, housing back rear, housing left side, housing right side, and control panel underside.