Production run
Toro 21199 partsSerial 407700000–410243166
The only 21199 run we opened where Toro lists the Atomic blade 20120P. It is also the first of the two later runs that carry no engine maintenance kit.
At your boundary
What changes at the edges of this run
Mower blades
20122P→20120Pby 407700000
This range lists the 15.4 Inch Atomic Blade 20120P. The previous listing we opened lists hi-lift 20122P.
Three unread listings sit between them, so 20120P had appeared by this serial rather than at it.
Toro publishes listings between the two we opened that we have not read, so the change happened at or before this serial rather than exactly on it.
Engine maintenance kits
130-8146→—by 407700000
Neither 130-8146 nor 130-8149 appears in this range’s accessory list.
Toro published a kit for the preceding run we opened and none here. It does not say why, and three runs in between are unread.
Toro publishes listings between the two we opened that we have not read, so the change happened at or before this serial rather than exactly on it.
Mower blades
20120P→20122Pby 414709996
The next listing we opened returns to hi-lift 20122P and does not carry 20120P.
Four unread listings sit between, so the blade went back at or before 414709996.
Toro publishes listings between the two we opened that we have not read, so the change happened at or before this serial rather than exactly on it.
In detail
This production run
Toro’s listing for a 21199 in this range shows the 15.4 Inch Atomic Blade, 20120P. The two earlier runs we opened show the hi-lift 20122P, and so does the latest one. This is the only listing of the four where the Atomic blade is what Toro publishes.
No engine maintenance kit appears in this range’s accessory list either — neither 130-8149 nor 130-8146. The last run we opened before this one carried 130-8146, and three unread runs sit in between, so the kit had gone by this range rather than at it. It is absent from the latest run we opened too. We record both as unknown, which means Toro does not list them here, not that they do not fit.
Both edges of this range are bracketed rather than exact. Three unread listings sit between this run and the previous one we opened, and four between this one and the next. So the blade became 20120P at or before 407700000 and returned to 20122P at or before 414709996, and neither can be narrowed without opening the listings in between.
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.
Mower blades
15.4 Inch Atomic Blade 20120P
Listed by Toro as the 15.4 Inch Atomic Blade on its official parts page for model 21199, serial range 407700000–410243166.
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.
130-8149 Not verified
Toro does not list kit 130-8149 on its parts page for model 21199, serial range 407700000–410243166. No engine maintenance kit appears in that range’s accessory list at all.
130-8146 Not verified
Toro does not list kit 130-8146 on its parts page for model 21199, serial range 407700000–410243166. No engine maintenance kit appears in that range’s accessory list at all.
20122P Not verified
Toro does not list blade 20122P on its parts page for model 21199, serial range 407700000–410243166; that range shows 20120P, the 15.4 Inch Atomic Blade, instead.
Every run we opened
Unchanged across the runs we opened
If you are close to the edge
Serial numbers near a boundary
Neither edge of this range is a serial to order against with confidence. If your plate falls near 407700000 or 414709996, the listing that actually covers it may be one of the seven we have not opened.
Other runs
Other production runs of the 21199
Toro publishes 11 parts listings for this model number. We have opened 4.
Method
How we established this
We compared this range’s accessory list against the three other 21199 listings we opened, and counted the unopened listings between them using Toro’s own range selector for the model.
The common mistake: Assuming a part number only ever moves forward. On this model number Toro lists 20122P, then 20120P, then 20122P again across the four runs we opened.
Provenance
Sources
Last verified against these sources on August 20, 2026.
- 1
Parts — 30in TimeMaster Lawn Mower, model 21199, serial range 407700000–410243166
The Toro Company · Primary source · Accessed August 17, 2026
No engine maintenance kit appears in this range’s accessory list at all. The blade shown is 20120P (15.4 Inch Atomic Blade), not 20122P.
- 2
Parts — 30in TimeMaster Lawn Mower, model 21199, serial range 400000000–402081999
The Toro Company · Primary source · Accessed August 17, 2026
Earliest of the four ranges we opened. Lists 130-8149 (BRIGGS MAINT KIT - TM 17 & NEWER) and 20122P (15.4 Inch Hi-Lift Replacement Blade Kit (TimeMaster)). The range selector names ten further ranges for this model number.
- 3
Parts — 30in TimeMaster Lawn Mower, model 21199, serial range 402082000–403599999
The Toro Company · Primary source · Accessed August 17, 2026
One range later. The maintenance kit is 130-8146 (Engine Maintenance Kit for Walk-Behind Power Mower) where the preceding range listed 130-8149. Blade 20122P is unchanged.
- 4
Parts — 30in TimeMaster Lawn Mower, model 21199, serial range 414709996–999999999
The Toro Company · Primary source · Accessed August 17, 2026
The latest published range. Still no maintenance kit. Blade 20122P is listed again, and 20120P is not — so across the four ranges we opened the blade number does not move in one direction.