Comes together with mounting bolts. This starter motor replaces Honda GX 390 electric starter motor GX 340 starter motor for 13 hp 11 hp 16hp engine.Replaces Honda starter motor part number # 31210-ZE3-023,31210ZB80130, 31210ZE3013, 31210ZE30130,128000-2750, SND0288, 41052044,DB5B6, DB5B8. The relay and Solenoid are included. Replaces Honda 13hp starter motor, Honda 11hp starter motor for GX340 GX390 GX420 338cc 340cc 389cc 390cc 420cc OHV engine and many application with these engines,including EC6500 generator, WT40 WT40X WT40XK1 WT40XK2 WT40XK3 water pump,Simpson, Dewalt, Mi-T-M, BE Power, Northstar pressure washer, log splitter, air compressor, chipper shredder and many more others powered by Honda 390GX 340GX engine.. Compatible with Harbor Freight Predator 420cc starter motor, Generac 389cc 420cc starter motor, Rato 420cc starter motor, Champion 389cc starter motor Champion 420cc starter motor, Westinghouse 420cc starter motor, Powerease 420cc starter motor, Loncin 389cc starter motor, Loncin 420cc starter motor ,Duromax 420cc starter motor, Dewalt 420cc starter motor, Simpson CRX420 starter motor,Genkins GK420E 420cc starter motor, Ducar 389cc starter motor, Ducar DH420 420cc starter motor, Powerease R420 starter motor, Ryobi 420cc starter motor and starter motor for many other 11hp 13hp 15hp 16hp 338cc 340cc 389cc 420cc 439cc engines, like Powerhorse, Firman and more. Compatible with many generator starter motor for 5500 6500 7000 7500 8000 8500 8750 9000 9375 generator, including Generac GP5500 GP6500 GP7500, GP8000E, Champion CPE generators, Westinghouse WGen9500 series generators, and many other generators powered by 389cc 390cc 420cc 439cc 454cc engines mentioned above Compatible with Kohler CH440 electric starter motor 17 098 11-S 17 098 11 S 17 098 05-S 17 098 05 S for 429cc Command engine. This electric starter motor fits Honda GX340 GX390 GX340U1 GX340R1 GX340K1 GX390T GX340T GX390T1 GX340T1 GX390UT2 GX340UT2 GX390RT2 GX390T2 GX390T2X GX390UT2X GX340RT2 GX340T2 GX340T2X GX340UT2X 337cm3 338cm3 340cm3 389cm3 390cm3 420cm3 11 horse power 13 horse power 15 horsepower 16 horses power engine, generator, water pump, compressor,pressure washer,snowblower and many other power equipment with these Honda engines. It also fits Harbor Freight Predator 420cc engine and power equipment, as well as Champion 389cc 420cc 439cc engine and power equipment. It fits Generac 389cc and 420cc engine and power equipment too. it is also compatible with Kohler CH440 engine