Zero-turn mower · Troy-Bilt Mustang Z50 / Mustang Z42

Troy-Bilt 17AAFACQ066 and 17AAFACS023 parts: blades, deck belt, spark plug, air filter and oil filter

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

679 cc

Your model

Fits 17AAFACQ066 and 17AAFACS023. Where a part differs, the row names the model.

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Parts for the Troy-Bilt 17AAFACQ066 and 17AAFACS023

Part	Number and size	Buy
Blade17AAFACQ066	Not confirmed
Blade17AAFACS023	MTD `942-04308A` part details Replaces 942-04308, 942-04312, 942-04312A	Search Amazon for 942-04308A
Deck belt17AAFACQ066	MTD `954-05078` part details	Search Amazon for 954-05078
Deck belt17AAFACS023	Not confirmed
Oil filter	MTD `951-12690` part details	Search Amazon for 951-12690
Air filter	MTD `937-05145` part details	Search Amazon for 937-05145
Spark plug	MTD `951-10292A` part details Replaces 951-10292	Shop

Checked October 6, 2026 · 18 sources

Engine: MTD 679 cc OHV vertical shaft twin (Troy-Bilt)

Displacement: 679 cc
Oil filter: MTD 951-12690
Spark plug: MTD 951-10292A
Air filter: MTD 937-05145

Where's my model number?

Under the seat pan; lift up the seat to see it

Other machines that use these parts (73)

Troy-Bilt Bronco 42 / Bronco 42I / TB2142 blade
Cub Cadet LTX 1040 blade
Cub Cadet LTX 1042 KW / XT2-LX42 KW blade
Cub Cadet XT1 LT46 with IntelliPower / XT1 LT42 with IntelliPower and others oil filter and spark plug
Cub Cadet XT1 LT42 / XT2-LX42 KH blade
Troy-Bilt Pony 42 / Pony 42X and others oil filter and spark plug
Troy-Bilt Super Bronco 42 XP blade, oil filter and spark plug
Troy-Bilt Pony 42 blade, oil filter and spark plug
Troy-Bilt Pony 42K blade
Cub Cadet ZT1 46 / ZT1 42 blade
Cub Cadet XT2 LX42 / XT2 LX46 oil filter, air filter and spark plug
Troy-Bilt Super Bronco / TB30T oil filter and spark plug
Cub Cadet ZT2 50 / ZT1 50 deck belt
Troy-Bilt Mustang Z50 deck belt
Cub Cadet ZT1 42 / ZT1 46 / ZTS1 50 deck belt
Cub Cadet ZTS1 50 deck belt
Cub Cadet ZTS2 50 deck belt
Cub Cadet XT1 LT42 IntelliPOWER / XT1 LT46 INTELLIPOWER oil filter and spark plug
Troy-Bilt Super Bronco 46 / Super Bronco XP 54 / Super Bronco 50 XP oil filter, air filter and spark plug
Troy-Bilt Mustang Z42 / Mustang Z46 oil filter and spark plug
Troy-Bilt TB WC33 XP oil filter and spark plug
Cub Cadet CC 800 oil filter and spark plug
Troy-Bilt Storm 2690 XP / Storm 2690 and others spark plug
Cub Cadet 2X 24" HP / 2X 524 SWE and others spark plug
Craftsman 24 in. Snow Thrower / 26 in. Snow Thrower spark plug
Craftsman 28 in. Snow Thrower / 30 in. Snow Thrower spark plug
Troy-Bilt Vortex 2610 / Vortex 2890 / Vortex Tracker 2890 XP spark plug
Troy-Bilt Storm 3090 / Vortex 2490 spark plug
Troy-Bilt Storm 2460 spark plug
Cub Cadet 3X 24" / 3X 24" HD and others spark plug
Yard-Man Two-Stage Snow Thrower spark plug
Troy-Bilt Storm Tracker 2890 / Arctic Storm 30 and others spark plug
Craftsman 22 in. Snow Thrower spark plug
Craftsman 33 in. Snow Thrower spark plug
Yard Machines Two-Stage Snow Thrower / 600 Series Snow Thrower spark plug
MTD Gold Two-Stage Snow Thrower spark plug
MTD Gold Two-Stage Snow Thrower / 600 Series Snow Thrower spark plug
Cub Cadet 3X 24" / 3X 24" HD and others spark plug
Cub Cadet 2X 526 SWE / 2X 28" HP and others spark plug
Troy-Bilt Vortex 2895 XP / Storm Tracker 2890 / Storm 2890 spark plug
Troy-Bilt Storm 2890 / Vortex 2490 and others spark plug
Cub Cadet 2X 26" HD IntelliPOWER / 2X 28" IntelliPOWER and others spark plug
Cub Cadet 3X 26" HD / 3X 30" HD and others spark plug
Troy-Bilt Vortex 2490 / Storm 2625 and others spark plug
Cub Cadet 2X 30" TRAC / 3X 30" TRAC / 3X 30" TRAC IntelliPOWER spark plug
Cub Cadet 2X 30" HP / 2X 30" IntelliPOWER EFI and others spark plug
Troy-Bilt Polar Blast 3310XP / Polar Blast 3310 / Polar Blast 4510 spark plug
MTD Pro Two-Stage Snow Thrower spark plug
Cub Cadet SC 500 Z / SC 500 HW and others spark plug
Cub Cadet 3X 26" TRAC / 3X 30" TRAC spark plug
Huskee 600 Series Snow Thrower / Two-Stage Snow Thrower spark plug
Cub Cadet 3X 30" PRO / 3X 34" PRO / 3X 30" MAX spark plug
Cub Cadet 3X 30" PRO H / 3X 34" PRO H / 3X 34" MAX H spark plug
Cub Cadet 3X 30" MAX IntelliPOWER EFI spark plug
Cub Cadet 930 SWE / 933 SWE / 945 SWE spark plug
Cub Cadet 3X 34" MAX H IntelliPOWER EFI spark plug
Troy-Bilt Vortex Tracker 2890 spark plug
Yard Machines 600 Series Snow Thrower / Two-Stage Snow Thrower spark plug
Yard Machines Two-Stage Snow Thrower spark plug
Remington Two-Stage Snow Thrower spark plug
Remington Two-Stage Snow Thrower spark plug
MTD Two-Stage Snow Thrower spark plug
Yard Machines Two-Stage Snow Thrower spark plug
Columbia Two-Stage Snow Thrower / Three-Stage Snow Thrower / Heavy Duty Three Stage Snow Thrower spark plug
Columbia Two-Stage Snow Thrower spark plug
Columbia Three Stage Track Snow Thrower spark plug
Columbia Two-Stage Snow Thrower spark plug
Columbia Two-Stage Snow Thrower spark plug
Columbia Three-Stage Snow Thrower / Two-Stage Snow Thrower spark plug
Columbia Three-Stage Snow Thrower spark plug
Troy-Bilt TB 340 spark plug
Cub Cadet CC 600 spark plug
Troy-Bilt TB WC28 spark plug

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 769-19031D · Troy-Bilt LLC · July 15, 2020
Details
Parts/Warranty Supplement, Troy-Bilt Mustang Z42, Mustang Z46, Mustang Z50, Mustang Z54, XP54 (Form No. 769-19031D, July 15, 2020); p1 Replacement Parts: '754-06134 Deck Belt, Z42', '754-06135 Deck Belt, Z46', '954-05078 Deck Belt, Z50', '954-04329A Deck Belt, Z54 & XP54', '754-04317A Drive Belt', '942-05528 Blade, Z42', '942-05510 Blade, Z46', '942-05094 Blade, Z50', '742-05086 Blade, Z54 & XP54'; no engine lines (used for machine and part numbers)
Operator's manual 769-19031B · Troy-Bilt LLC · July 17, 2019
Details
Parts/Warranty Supplement, Troy-Bilt Mustang Z42, Mustang Z46, Mustang Z50, Mustang Z54, XP54 (Form No. 769-19031B, July 17, 2019); p1 Replacement Parts, keyed by Cub Cadet ZT names: '754-06134 Deck Belt, ZT1 42', '754-06135 Deck Belt, ZT1 46', '954-05078 Deck Belt, ZT1/ZT2 50', '954-04329A Deck Belt, ZT1/ZT2 54', '754-05874 Drive Belt', '942-04312 Blade, ZT1 42', '942-04244A Blade, ZT1 46', '942-05052A Blade, ZT1/ZT2 50', '942-05056A Blade, ZT1/ZT2 54'; no engine lines (an earlier edition of the 769-19031D series; one source with it) (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 17AAFACQ066 (2020) IPL .Quick Reference: '954-05078 V-BELT B SEC x 143.5 LG'; '754P05874 BELT-TRANS DRIVE A x 69.1'; '942-05052A 17.27" BLADE (2N1)'; '937-05145 AIR FILTER ELEMENT', '951-12690 ENGINE OIL FILTER', '951-3013 FUEL FILTER', '951-10292 SPARK PLUG' superseded to 951-10292A (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 17AAFACQ066 (2020) IPL Deck: ref 34 '954-05078 V-BELT B SEC x 143.5 LG'; ref 31 '942-05052A 17.27" BLADE (2N1)' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 17AAFACQ066 (2020) IPL Label Map: 777D29800 'LABEL-TROY BILT 679 CC OHV AIR CLNR', 777D35078 'LABEL-Z50 DECK T-BILT RZ19' (used for machine and part numbers)
Engine manual 769-17450 · MTD LLC · August 22, 2018
Details
Operator's Manual, 679 cc OHV Vertical Shaft Engine (Form No. 769-17450, August 22, 2018); p13 Replacement Parts: '951-10292 Spark Plug', '937-05145 Air Filter Assembly (Includes Pre-Filter)', '951-12690 Oil Filter' (used for machine and part numbers, engine)
Operator's manual 769-18950D · MTD Products · October 24, 2019
Details
Operator's Manual, Zero-Turn Rider (RZ19) (Form No. 769-18950D, October 24, 2019); p1 'Record Product Information': 'You can locate the model plate by lifting up the seat and looking under the seat pan.' (used for machine and part numbers)
Maker's model page · Troy-Bilt LLC
Details
troybilt.com model page 17AAFACQ066 (heading 'Mustang Z50 Zero-Turn Rider'; description 'MOWER:ZTL:50SD D ZT'; engine text '679cc V-twin OHV Troy-Bilt engine'; manuals listed 769-19031D_FR, 769-19031D, 769-23590, 769-23593, 769-18950D, 769-19031B, 769-17450), retrieved 2026-10-06 (ruling 1: ties the plate to its manuals and engine only) (used for machine and part numbers)
Operator's manual 769-19031A · Troy-Bilt LLC · May 3, 2019
Details
Parts/Warranty Supplement, Troy-Bilt Mustang Z42, Mustang Z46 (Form No. 769-19031A, May 3, 2019); p1 Replacement Parts: '754-06134 Deck Belt, Z42', '754-06135 Deck Belt, Z46', '754-05874 Drive Belt', '942-04312 Blade, Z42', '942-04244A Blade, Z46'; no engine lines (an earlier edition of the 769-19031 series; one source with 769-19031B) (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2019 variant
Details
Troy-Bilt 17AAFACS023 (2019) IPL .Quick Reference: '754P06134 V-BELT A SEC x 117.0' Belt (PTO / Deck); '754P05874 BELT-TRANS DRIVE A x 69.1' Belt (Trans Drive); '942-04312 21.23" BLADE (2N1)' Blades, superseded to 942-04308A; '937-05145 AIR FILTER ELEMENT', '951-12690 ENGINE OIL FILTER', '951-3013 FUEL FILTER', '951-10292 SPARK PLUG' superseded to 951-10292A (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2019 variant
Details
Troy-Bilt 17AAFACS023 (2019) IPL Deck: ref 29 '942-04312 21.23" BLADE (2N1)' superseded to 942-04308A; ref 32 '754P06134 V-BELT A SEC x 117.0' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 17AAFACS023 (2020) IPL .Quick Reference: '942-04312A 21.23" BLADE (2N1)' superseded to 942-04308A; '754P06134 V-BELT A SEC x 117.0'; '754P05874 BELT-TRANS DRIVE A x 69.1'; '937-05145 AIR FILTER ELEMENT', '951-12690 ENGINE OIL FILTER', '951-3013 FUEL FILTER', '951-10292 SPARK PLUG' superseded to 951-10292A (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 17AAFACS023 (2020) IPL Deck: ref 29 '942-04312 21.23" BLADE (2N1)' superseded to 942-04308A; ref 32 '754P06134 V-BELT A SEC x 117.0' (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 17AAFACS023 (2020) IPL Label Map: 777D29800 'LABEL-TROY BILT 679 CC OHV AIR CLNR', 777D25783 'LABEL-Z42 DECK T-BILT RZ19' (the 2019 Label Map the same) (used for machine and part numbers)
Maker's model page · Troy-Bilt LLC
Details
troybilt.com model page 17AAFACS023 (heading 'Mustang Z42 Zero-Turn Rider'; description 'MOWER:ZTL:42SD D EZT'; engine text '679cc V-twin OHV Troy-Bilt engine'; manuals listed 769-23590, 769-23593, 769-18950D, 769-19031B, 769-19031A, 769-18950A, 769-17450), retrieved 2026-10-06 (ruling 1: ties the plate to its manuals and engine only) (used for machine and part numbers)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 13AJA1BN066 (2020) IPL .Quick Reference: '951-10292 SPARK PLUG ... Superseded to 951-10292A', '937-05145 AIR FILTER ELEMENT', '951-12690 ENGINE OIL FILTER', '951-3013 FUEL FILTER' (used for engine)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 13AJA1BN066 (2020) IPL Label Map: 777D29800 'LABEL-TROY BILT 679 CC OHV AIR CLNR' (used for engine)
Parts list · PartsTree (dealer copy of MTD IPL) · 2020 variant
Details
Troy-Bilt 13AJA2BW066 (2020) IPL .Quick Reference: '951-10292A SPARK PLUG', '937-05145 AIR FILTER ELEMENT', '951-12690 ENGINE OIL FILTER' (13BJA1BZ066 2020 prints the same three) (used for engine)