Production run
Toro 20339 partsSerial 316000001–316999999
The last 20339 run listing kit 20234 — from 400000000 it is 130-8148. The rear wheel appears only as a bare cross-reference, not a named product.
At your boundary
What changes at the edges of this run
Engine maintenance kits
20234→130-8148at 400000000
Toro lists 20234 for this range and 130-8148 for the 400000000–401999999 range.
The two listings are consecutive, so this is a change at 400000000 rather than somewhere in a span.
In detail
This production run
The engine maintenance kit is the change we can state cleanly on this machine: Toro lists 20234 for this range and 130-8148 for the 400000000–401999999 range. Those two listings are consecutive, so that boundary is exact.
The rear wheel is the interesting one, and we cannot state it cleanly. This page carries no named rear-wheel product. What it carries is a bare cross-reference line — XRef: 137-4837 (Part # 119-0313) — labelled Genuine OEM Part, with no product name beside it. It is the one entry in that accessory list carrying no name; the rest are named, though one other is unpriced. The later listing sells Replacement 11 in. Rear High Wheel for Push and Front Wheel Drive Lawn Mowers under part number 137-4837P.
Three numbers are in play, and Toro reconciles one pair of them — not on either listing, but on the older number's own product page. Request 119-0313 as a product and Toro serves a page titled 11 Inch Rear Wheel, part number 137-4837, above the line "Replaces Product 119-0313." So the number printed in this cross-reference has been replaced by the number the cross-reference points at.
The third is still unlinked. 137-4837P has its own live page under its own title — Replacement 11 in. Rear High Wheel for Push and Front Wheel Drive Lawn Mowers — with no supersession line in either direction, and neither wheel page mentions the other. We are not going to tell you those two are the same wheel, because Toro does not.
All nine listings Toro publishes for this model number have been opened, and the two either side of this boundary are consecutive.
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.
Engine maintenance kits
Engine Maintenance Kit for Briggs & Stratton Engine 20234
Listed by Toro as the Engine Maintenance Kit for Briggs & Stratton Engine on its official parts page for model 20339, serial range 316000001–316999999.
Drive belts
22 Inch Drive Belt for Recycler Mower 38990
Listed by Toro as 22 Inch Drive Belt for Recycler Mower on its official parts page for model 20339, serial range 316000001–316999999.
Wheels and drive gears
Replacement Front Wheel Drive Internal Gear 59502
Listed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 316000001–316999999.
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 20339, serial range 316000001–316999999. This is a fuel treatment rather than a fitted part.
Mower blades
22 Inch Recycler Blade 59534P
Listed by Toro as 22 Inch Recycler Blade on its official parts page for model 20339, serial range 316000001–316999999.
Grass bags
Grass Bag for Walk Power Mower 59305
Listed by Toro as Grass Bag for Walk Power Mower among the accessories on its parts page for model 20339, serial range 316000001–316999999.
Grass bags
Bag Replacement Kit 59307
Listed by Toro as Bag Replacement Kit among the accessories on its parts page for model 20339, serial range 316000001–316999999.
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 20339, serial range 316000001–316999999.
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.
130-8148 Not verified
Toro does not list kit 130-8148 on its parts page for model 20339, serial range 316000001–316999999; that range shows kit 20234 instead.
137-4837P Not verified
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.
131-6572 Not verified
Toro does not name Premium Fuel Treatment (12 oz.) (131-6572) among the accessories on its parts page for model 20339, serial range 316000001–316999999.
38903 Not verified
Toro does not name SAE 30 4-Cycle Lawn Mower Engine Oil 32 oz (38903) among the accessories on its parts page for model 20339, serial range 316000001–316999999.
38916 Not verified
Toro does not name SAE 30 4-Cycle Summer Engine Oil 18 oz. (38916) among the accessories on its parts page for model 20339, serial range 316000001–316999999.
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 20339, serial range 316000001–316999999.
If you are close to the edge
Serial numbers near a boundary
Serial numbers just under 400000000 fall in this range, where Toro lists kit 20234. If you need a rear wheel and your serial is near that edge, check the cross-reference on this page against the later listing before ordering.
Other runs
Other production runs of the 20339
Toro publishes 9 parts listings for this model number. We have opened 9.
Method
How we established this
We opened all nine of Toro’s parts listings for model 20339 and compared the accessories they name against the parts this site holds; this page turns on the two either side of 400000000, which are consecutive. Parts present in one listing and absent from another are recorded as unknown rather than incompatible. 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: Assuming the three numbers here settle into one wheel. Toro states one link — 137-4837 replaces the 119-0313 printed on this page — and states nothing at all about 137-4837P, which it sells on the later listing under its own name, on its own product page.
Provenance
Sources
Last verified against these sources on August 21, 2026.
- 1
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.
- 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
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
11 Inch Rear Wheel (Part # 137-4837), served at /product/119-0313
The Toro Company · Primary source · Accessed September 5, 2026
Requesting the older number as a product answers 200 with no redirect and serves a page titled 11 Inch Rear Wheel under part number 137-4837, carrying the line “Replaces Product 119-0313.” It names no machine. It repeats the 11 in. figure from the title in the overview’s own sentence but gives no other dimension — corrected 5 September 2026 from an earlier reading that said the page gave no dimensions at all. This is Toro reconciling two of the three numbers that meet in the 20339’s rear-wheel cross-reference, which this site had recorded as unreconciled since 20 August.
- 5
Replacement 11 in. Rear High Wheel for Push and Front Wheel Drive Lawn Mowers (Part # 137-4837P)
The Toro Company · Primary source · Accessed August 21, 2026
A live page distinct from 137-4837’s: a different title, 200 with no redirect, and no supersession line in either direction. It describes an 11 in. rear high wheel for Toro walk-behind push and front-wheel-drive mowers, gives no dimensions and names no model, and instructs the reader to verify model and serial number before ordering. Nothing on it links this number to 137-4837 or to 119-0313, and nothing on either of those pages links back.
- 6
11 Inch Rear Wheel (Part # 137-4837)
The Toro Company · Primary source · Accessed August 21, 2026
The same wheel served directly at its own number, 200 and no redirect. This page carries no supersession line — the “Replaces Product 119-0313” line appears only when the older number is requested, which is why reading the parts listings never surfaced it. It names no machine and gives no dimensions.