Ariens 911173, 911175 and 911179 parts: blades, drive belt, spark plug and air filter

Checked October 6, 2026 · From the manufacturer's operator's manual and parts list

21 in deck
159 cc

Your model

Fits 911173 (21 in deck), 911175 (21 in deck) and 911179 (21 in deck). Where a part differs, the row names the model.

Shop buttons go to Amazon. As an Amazon Associate, SparkyFits earns from qualifying purchases; it never changes a part we list. How we make money.

Parts for the Ariens 911173, 911175 and 911179

Part	Number and size	Buy
Blade	Ariens `04544400` Qty 1	Search Amazon for 04544400
Air filter	Ariens `21100121`	Search Amazon for 21100121
Spark plug	Ariens `21100123`	Search Amazon for 21100123
Drive belt911173	Not confirmed
Drive belt911175, 911179	Ariens `07200633`	Search Amazon for 07200633

Checked October 6, 2026 · 18 sources

Engine: Ariens 159 cc (Ariens engine 08200829 / 08200830)

Displacement: 159 cc
Spark plug: Ariens 21100123
Air filter: Ariens 21100121

Where's my model number?

Serial number label on the frame of the unit (manual Figure 1); the model and serial numbers are also on the product registration form.

Where these numbers come from (18 sources)

Every part number above is printed in at least two of these. Checked October 6, 2026. How we check parts.

Operator's manual 04832200A · Ariens Company · 6/15
Details
Razor Owner/Operator Manual, models 911173 LMP, 911175 LMSP, 911177 LMSP BBC, 911179 LMSPE, 911188 LMSP, 911189 LMSP BBC, 911190 LMSPE, all SN 035000 + (cover; Service Parts page EN-29 (PDF page 31); Specifications page EN-31 (PDF page 33); serial number label, page EN-1) (used for machine and part numbers, engine)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911173 (LMP) Razor 21in, SN 035000 - 036999: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200829 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911173 (LMP) Razor 21in, SN 037000 - 054999: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200829 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911173 (LMP) Razor 21in, SN 055000 & above: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200829 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor 21in, SN 035000 - 036999: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200829 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor 21in, SN 035000 - 036999: Transmission And Height Of Cut item 16 07200633 'V-BELT, 3L-WRAPPED' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor 21in, SN 037000 - 054999: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200829 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor 21in, SN 037000 - 054999: Transmission And Height Of Cut item 16 07200633 'V-BELT, 3L-WRAPPED' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor 21in, SN 055000 & above: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200829 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor 21in, SN 055000 & above: Transmission And Height Of Cut item 16 07200633 'V-BELT, 3L-WRAPPED' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor 21in, SN 035000 - 036999: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200830 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor 21in, SN 035000 - 036999: Transmission And Height Of Cut item 16 07200633 'V-BELT, 3L-WRAPPED' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor 21in, SN 037000 - 054999: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200830 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor 21in, SN 037000 - 054999: Transmission And Height Of Cut item 16 07200633 'V-BELT, 3L-WRAPPED' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor 21in, SN 055000 & above: Engine And Blade item 5 04544400 'BLADE, MOWER 21" HIGH LIFT'; item 9 engine 08200830 'ENGINE, LONCIN 159CC VERT.' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor 21in, SN 055000 & above: Transmission And Height Of Cut item 16 07200633 'V-BELT, 3L-WRAPPED' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911175 (LMSP) Razor SN 035000-036999: Engine (08200829) item 22 21100121 'FILTER, AIR - LONCIN 160CC', item 24 21100123 'SPARK PLUG, LONCIN 160CC'; Engine And Blade item 9 08200829 'ENGINE, LONCIN 159CC VERT.' (used for engine)
Parts list · PartsTree (dealer copy of Ariens IPL)
Details
Ariens 911179 (LMSPE) Razor SN 035000-036999: Engine (08200830) item 22 21100121 and item 24 21100123; Engine And Blade item 9 08200830 'ENGINE, LONCIN 159CC VERT. ES' (used for engine)