Production run

Toro 20334 partsSerial 406577037–999999999

The newest 20334 range. One number in its accessory list changes at this serial, the engine oil: 117-0066 gives way to 138-6053, which Toro says replaces it.

At your boundary

What changes at the edges of this run

Engine oil

117-0066→138-6053at 406577037

This range lists Toro Full Synthetic 10W-30 Engine Oil (32 oz.) 138-6053 and does not list 117-0066. The listing directly below it, 405639614–406577036, lists 117-0066 and not 138-6053.

The two listings are consecutive in Toro’s own selector, so 406577037 is where the listed oil changes rather than where we first notice it. Toro also states the relationship between the numbers on its product page: asking for 117-0066 serves the 138-6053 page under the line “Replaces Product 117-0066”.

In detail

This production run

A 20334 with a serial of 406577037 or above is in the newest, open-ended range Toro publishes for this model, and its accessory list differs from the one for the run below it by exactly one number.

Both listings carry sixteen accessories. Fifteen of them are the same number in the same order — among them the maintenance kit 130-8148, the front wheel 137-4833P, the blade 59534P and the drive belt 38991. The sixteenth is the engine oil, and it is the only accessory number that moves: 117-0066 on the earlier listing, 138-6053 on this one.

That is a statement about the accessory lists and not about the whole of either page. The two listings also name different Parts Catalog and Operator’s Manual form numbers, and two of their assembly drawings carry different titles. This site has not compared the drawings, so it does not say the machines are otherwise the same.

Toro says those two numbers are the same purchase. Requesting the product page for 117-0066 answers without a redirect and serves the page for 138-6053, under the line “Replaces Product 117-0066”. That is the manufacturer stating a supersession rather than this site inferring one from where the numbers appear.

One thing this page will not tidy away. 117-0066 is also absent from an earlier listing, 402000000–404319999, and present in the ranges either side of it. That listing names nine accessories where each neighbour names sixteen: it is missing six other numbers at the same time — a bottled fuel, a fuel treatment, two SAE 30 oils and two bags — which we read as a thin listing rather than a machine that changed and changed back. It does not affect the boundary here, and it is written down because a note that showed 117-0066 as an unbroken run would be tidier than Toro’s pages are.

Confirmed

What we have recorded for this serial range

We record the part categories this site covers. Toro’s own listing for this range carries other accessories besides.

Drive belts
22 inch Drive Belt for RWD Toro WPM 38991
Listed by Toro as 22 inch Drive Belt for RWD Toro WPM on its official parts page for model 20334, serial range 406577037–999999999.
Wheels and drive gears
8 inch Replacement Rear-Wheel-Drive Wheel for Lawn Mowers 59503
Listed by Toro as 8 inch Replacement Rear-Wheel-Drive Wheel for Lawn Mowers on its official parts page for model 20334, serial range 406577037–999999999.
Engine maintenance kits
Briggs & Stratton EXi Engine Maintenance Kit Replacement 130-8148
Listed by Toro as Briggs & Stratton EXi Engine Maintenance Kit Replacement on its official parts page for model 20334, serial range 406577037–999999999.
Handles and controls
Traction Assist Handle 131-4590
Listed by Toro as Traction Assist Handle on its official parts page for model 20334, serial range 406577037–999999999.
Fuel treatment
Premium Fuel Treatment (0.5 oz.) 130-2393
Listed by Toro as Premium Fuel Treatment (0.5 oz.) on its official parts page for model 20334, serial range 406577037–999999999.
Wheels and drive gears
8 Inch Front Wheel 137-4833P
Listed by Toro as 8 Inch Front Wheel on its official parts page for model 20334, serial range 406577037–999999999.
Mower blades
22 Inch Recycler Blade 59534P
Listed by Toro as 22 Inch Recycler Blade on its official parts page for model 20334, serial range 406577037–999999999.
Fuel treatment
Premium Fuel Treatment (12 oz.) 131-6572
Listed by Toro as Premium Fuel Treatment (12 oz.) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
Engine oil
SAE 30 4-Cycle Lawn Mower Engine Oil 32 oz 38903
Listed by Toro as SAE 30 4-Cycle Lawn Mower Engine Oil 32 oz among the accessories on its parts page for model 20334, serial range 406577037–999999999.
Engine oil
SAE 30 4-Cycle Summer Engine Oil 18 oz. 38916
Listed by Toro as SAE 30 4-Cycle Summer Engine Oil 18 oz. among the accessories on its parts page for model 20334, serial range 406577037–999999999.
Engine oil
Toro Full Synthetic 10W-30 Engine Oil (32 oz.) 138-6053
Listed by Toro as Toro Full Synthetic 10W-30 Engine Oil (32 oz.) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
Grass bags
Replacement Bag 59310
Listed by Toro as Replacement Bag among the accessories on its parts page for model 20334, serial range 406577037–999999999.
Striping kits
Striping Kit for Walk-Behind Mowers 20601
Listed by Toro as Striping Kit for Walk-Behind Mowers among the accessories on its parts page for model 20334, serial range 406577037–999999999.

Not listed here

Listed for a neighbouring run, but not this one

Absence from a parts listing is not a statement that a part does not fit. It is the manufacturer not saying.

20234 Not verified
Toro does not name Engine Maintenance Kit for Briggs & Stratton Engine (20234) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
59502 Not verified
Toro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
108-8120 Not verified
Toro does not name TRACTION ASSIST KIT [PPG2] (108-8120) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
59534 Not verified
Toro does not name 22 Inch Atomic Blade (59534) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
120-3303 Not verified
Toro does not list engine maintenance kit 20234 among the accessories on its parts page for model 20334, serial range 406577037–999999999. This site reaches this component only as a content of that kit, so with the kit absent there is no route from Toro’s pages to this part for this range — a fact about the route, not about the machine.
120-3305 Not verified
Toro does not list engine maintenance kit 20234 among the accessories on its parts page for model 20334, serial range 406577037–999999999. This site reaches this component only as a content of that kit, so with the kit absent there is no route from Toro’s pages to this part for this range — a fact about the route, not about the machine.
117-0066 Not verified
Toro does not name *OBS* Toro full synthetic 10W-30 engine oil (117-0066) among the accessories on its parts page for model 20334, serial range 406577037–999999999.
59312 Not verified
Toro does not name BAG - REPL KIT 2009 RWD RC (59312) among the accessories on its parts page for model 20334, serial range 406577037–999999999.

If you are close to the edge

Serial numbers near a boundary

A serial just below 406577037 falls in the previous range, where Toro lists 117-0066 instead. Toro states that 138-6053 replaces it, so at this boundary the older number points somewhere rather than simply stopping.

Where Toro puts the serial plate

Other runs

Other production runs of the 20334

Toro publishes 14 parts listings for this model number. We have opened 14.

Method

How we established this

We opened all fourteen listings Toro publishes for model 20334 and compared the accessory lists for 405639614–406577036 and 406577037–999999999 in full, then opened the product pages for both oil numbers to establish what Toro says about the pair. The pages also carry accessories this site holds no record for, so this is a comparison within the categories it records rather than an exhaustive diff of what they list.

The common mistake: Reading a changed oil number as proof the machine changed. Engine oil is a consumable, and what moved in the accessory list is which bottle Toro lists.

Provenance

Sources

Last verified against these sources on September 18, 2026.

1
Parts — 22in Recycler Lawn Mower, model 20334, serial range 406577037–999999999
The Toro Company · Primary source · Accessed August 21, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.
2
Engine Maintenance Kit for Briggs & Stratton Engine (Part # 20234)
The Toro Company · Primary source · Accessed August 31, 2026
Toro’s product page for the kit, and one of the few in this family that is a page for the number requested rather than for a part replacing it. It itemizes the kit: 20 oz. SAE 30 engine oil (120-3306), a spark plug (120-3305), an air filter (120-3303) and a 0.5 oz. packet of fuel treatment (130-2393). It carries no line saying this kit replaces another number or has been replaced by one. **Re-read 31 August 2026 and unchanged in every particular, including the 0.5 oz.** — which matters, because the page Toro serves for 130-8148 gives the same packet as .05 oz. Two further details this record had not held: the internal designation TORO WPM MAINT KIT - BRIGGS, and a Specifications row reading Service Pack Yes.
3
Parts — 22" Personal Pace Electric Start Mower, model 20334, serial range 400000000–401999999
The Toro Company · Primary source · Accessed August 17, 2026
The later range. Still lists 130-8148 and 131-4590, so the maintenance kit does not change again here. It lists 137-4833P (8 Inch Front Wheel) and does not list 59502 — a second, separate boundary within the same model number.
4
Parts — 22in Recycler Lawn Mower, model 20334, serial range 402000000–404319999
The Toro Company · Primary source · Accessed August 21, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.
5
Parts — 22in Recycler Lawn Mower, model 20334, serial range 404320000–405639613
The Toro Company · Primary source · Accessed August 21, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.
6
Parts — 22in Recycler Lawn Mower, model 20334, serial range 405639614–406577036
The Toro Company · Primary source · Accessed August 21, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.
7
OIL-30/10W-30 SYNTHETIC CK4 [QT] (Part # 138-6053), served at /product/117-0066
The Toro Company · Primary source · Accessed September 5, 2026
Requesting the 117-0066 product URL serves the page for 138-6053 under the line “Replaces Product 117-0066”, which is Toro stating the oil supersession directly rather than this site inferring it from which number sits against which serial range. Re-read 31 August 2026 and unchanged, and again 5 September 2026. Internal designation OIL-30/10W-30 SYNTHETIC CK4 [QT]. One bullet frames the oil for zero-turn riding mowers (TimeCutter MX, Titan, Titan MX) while the overview calls it the choice for any outdoor power equipment; the page names no walk-behind model. It does state a capacity — the title reads “(32 oz.)” and the first bullet repeats “10W-30 engine oil (32 oz.)” — corrected 5 September 2026 from an earlier reading that missed it.
8
OIL-30/10W-30 SYNTHETIC CK4 [QT] (Part # 138-6053)
The Toro Company · Primary source · Accessed August 28, 2026
The same page served at its own number, and it is the same page carrying that one “Replaces Product 117-0066” line — so Toro states the supersession once and either number reaches it, which is not the same as stating it from both directions. This page is now also the source for part 138-6053 itself: batch 13 created the pt_engine_oil category, so the clause that used to sit here — that engine oil is in no category this site records — stopped being true the moment that batch was staged.