![Generac 4000 Watt Portable Generator Replacement For Model S4000 (9421-0)](images/generac_logo.png)
Generac 4000 Watt Portable Generator Replacement Parts For Model S4000 (9421-0)
Find Generac S4000 (9421-0) Parts By Symptom
Choose a symptom to view parts that fix it.
Leaks gas |
Won't start |
No voltage output |
Low voltage output |
Circuit breaker trips continuously |
Starts, runs for a while, then dies |
Starts but immediately dies |
Show All Symptoms |
Popular Parts for Generac S4000 (9421-0)
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78266 OEM replacement Engine Code 23 B&s 8](images2/photo_not_available.png)
Part Number:78266
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82876 OEM replacement Lo-tone Muffler 8hp](images2/photo_not_available.png)
Part Number:82876
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 66825A OEM replacement Use 66825c Brg Carie](images2/photo_not_available.png)
Part Number:66825A
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 66365G OEM replacement Adpt Hg 8hp Lg Pilot](images2/photo_not_available.png)
Part Number:66365G
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 22336 OEM replacement Use 48614 5/16-24](images2/photo_not_available.png)
Part Number:22336
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 74716 OEM replacement Use 74716j Rotor Asy](images2/photo_not_available.png)
Part Number:74716
Usually ships in 7 - 12 business days
Part Number:G065791
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 67451 OEM replacement Use 96796 Washer](images2/photo_not_available.png)
Part Number:67451
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 75431 OEM replacement Screw Ihhc 5/16-24 X 8-1/2 G5](images2/photo_not_available.png)
Part Number:75431
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 79636 OEM replacement Statr Asy 4000w Fc](images2/photo_not_available.png)
Part Number:79636
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 66449D OEM replacement Stat Blt M6-1.0 X130](images2/photo_not_available.png)
Part Number:66449D
Usually ships in 7 - 12 business days
Part Number:G022097
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 66850 OEM replacement Assembly Bridge Rect.](images2/photo_not_available.png)
Part Number:66850
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G066849 OEM replacement Screw Hhtt M5-0.8 X 16](images2/photo_not_available.png)
Part Number:G066849
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 67025 OEM replacement Use B67025 Bc Cover](images2/photo_not_available.png)
Part Number:67025
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 25433 OEM replacement Lug Sldlss #6-14 X 13/64 Cu](images2/photo_not_available.png)
Part Number:25433
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 81887C OEM replacement Alt Wrap 96 X 623](images2/photo_not_available.png)
Part Number:81887C
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G052618 OEM replacement Screw Hhc M5-0.8 X 12 C8.8](images2/photo_not_available.png)
Part Number:G052618
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G052856 OEM replacement Nut Top Lock Fl M5-0.8](images2/photo_not_available.png)
Part Number:G052856
Usually ships in 7 - 12 business days
Part Number:G022145
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 76222 OEM replacement Pphms M8-1.25 X 40](images2/photo_not_available.png)
Part Number:76222
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 70642 OEM replacement Vibration Mount 45](images2/photo_not_available.png)
Part Number:70642
Usually ships in 7 - 12 business days
Part Number:G052858
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 77840 OEM replacement Use 91020 Cradle](images2/photo_not_available.png)
Part Number:77840
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 77874 OEM replacement Fuel Tank](images2/photo_not_available.png)
Part Number:77874
Not Available for Retail Sale
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78824 OEM replacement Use 84582 Cap](images2/photo_not_available.png)
Part Number:78824
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78298 OEM replacement Use 80270 Fuel Vlv](images2/photo_not_available.png)
Part Number:78298
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78831 OEM replacement Use 78831b Hhcs](images2/photo_not_available.png)
Part Number:78831
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78830 OEM replacement Washer, Special Blck](images2/photo_not_available.png)
Part Number:78830
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 77395 OEM replacement Nutflng.lck M6 Blck](images2/photo_not_available.png)
Part Number:77395
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78951A OEM replacement Heat Shield C Series](images2/photo_not_available.png)
Part Number:78951A
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 56892 OEM replacement Screw Crimptite 10-24 X 3/8](images2/photo_not_available.png)
Part Number:56892
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 22769 OEM replacement Washer Shakeproof Int #10](images2/photo_not_available.png)
Part Number:22769
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82879 OEM replacement Cntrl Pnl Back-metal](images2/photo_not_available.png)
Part Number:82879
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 63036 OEM replacement Screw Crimptite #8-18 X 1/4](images2/photo_not_available.png)
Part Number:63036
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 68868T OEM replacement 120 Volt 30 Amp Twistlock Receptacle](images2/photo_not_available.png)
Part Number:68868T
Not Available for Retail Sale
![Generac S4000 (9421-0) 4000 Watt Portable Generator 68867T OEM replacement 120/240 Volt 20 Amp Twistlock Receptacle](images2/photo_not_available.png)
Part Number:68867T
Not Available for Retail Sale
![Generac S4000 (9421-0) 4000 Watt Portable Generator 63025 OEM replacement Outlet 15a 120v Duplex](images2/photo_not_available.png)
Part Number:63025
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 75207D OEM replacement Breaker Circuit 15a](images2/photo_not_available.png)
Part Number:75207D
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82857 OEM replacement Vibe Damp Ebco](images2/photo_not_available.png)
Part Number:82857
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G023365 OEM replacement Washer Lock Int #8](images2/photo_not_available.png)
Part Number:G023365
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 23865 OEM replacement No. 8-32 X 3/8 Screw](images2/photo_not_available.png)
Part Number:23865
Not Available for Retail Sale
![Generac S4000 (9421-0) 4000 Watt Portable Generator 22153 OEM replacement Screw Rhm #8-32 X 1/2](images2/photo_not_available.png)
Part Number:22153
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 76220 OEM replacement Coil Idle Control*](images2/photo_not_available.png)
Part Number:76220
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G023897 OEM replacement Washer Flat #10 Zinc](images2/photo_not_available.png)
Part Number:G023897
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 22694 OEM replacement Conn Rcpt 6p Housing Blk](images2/photo_not_available.png)
Part Number:22694
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82860 OEM replacement Baffle-control Pnl](images2/photo_not_available.png)
Part Number:82860
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 22695 OEM replacement Conn Tab 6p Housing Blk](images2/photo_not_available.png)
Part Number:22695
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82881 OEM replacement Int Lockwasher Pcp](images2/photo_not_available.png)
Part Number:82881
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 75494 OEM replacement Screw Hhsd #10-16 X 5/8](images2/photo_not_available.png)
Part Number:75494
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G075475 OEM replacement Screw Pphm M4-0.7 X 10](images2/photo_not_available.png)
Part Number:G075475
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G038150 OEM replacement Washer Flat #8 Zinc](images2/photo_not_available.png)
Part Number:G038150
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G022264 OEM replacement Washer Lock #8-m4](images2/photo_not_available.png)
Part Number:G022264
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 203 - 051715 OEM replacement Nut Hex M4- 0.7 (15 Kw)](images2/photo_not_available.png)
Part Number:203 - 051715
Discontinued
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82700 OEM replacement Cntl Pnl Sht Mtl Csa](images2/photo_not_available.png)
Part Number:82700
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 80077 OEM replacement Screw Pphm M4-.7 X 20lg Zinc](images2/photo_not_available.png)
Part Number:80077
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 77278E OEM replacement Obs Tsm,transfrmr Ic](images2/photo_not_available.png)
Part Number:77278E
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 10953621 OEM replacement Gnd Wire Assy](images2/photo_not_available.png)
Part Number:10953621
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 24911 OEM replacement Screw Hhtt #8-32 X 3/8 Cz](images2/photo_not_available.png)
Part Number:24911
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 27482 OEM replacement Washer Shakeproof Ext 5/16 Stl](images2/photo_not_available.png)
Part Number:27482
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 67632D OEM replacement Idle Ctrl Pcb Asm](images2/photo_not_available.png)
Part Number:67632D
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78503A OEM replacement Throttle Plate](images2/photo_not_available.png)
Part Number:78503A
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 78502A OEM replacement Bracket Adjustment](images2/photo_not_available.png)
Part Number:78502A
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 73720A OEM replacement Solenoid Mntg. Bracket](images2/photo_not_available.png)
Part Number:73720A
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator G067022 OEM replacement Grommet, Rubber](images2/photo_not_available.png)
Part Number:G067022
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 55869 OEM replacement Switch Toggle Spst Main W/seal](images2/photo_not_available.png)
Part Number:55869
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 25244 OEM replacement Nut Hex Jam 5/16-18 Steel](images2/photo_not_available.png)
Part Number:25244
Usually ships in 7 - 12 business days
![Generac S4000 (9421-0) 4000 Watt Portable Generator 82856 OEM replacement Cnt Pnl Back I/c](images2/photo_not_available.png)
Part Number:82856
Usually ships in 7 - 12 business days