BRIGGS STRATTON INTEK AVS 4-stroke vertical shaft engine for lawn tractors mowers lawn mowers to 13.0 HP unified flange for all engines snowploughs snow blower motorcaravan snow blower front rider zero turn and other uses SUPPLIED WITH ORIGINAL BRIGGS BOX TECHNICAL CHARACTERISTICS: Shaft D. x L cylindrical 25.4 x 80 mm Engine type Single cylinder, 4-stroke, air-cooled, OHV Model 21R8 Serial number 3130 Torque at 3600 rpm 22.75 Nm Displacement 344 cc Cylinder type Cast iron Bore x stroke 87.3 x 57.5 mm Oil quantity 1.4 l Dry weight 26.8 kg Dimensions L x W x H 452 x 393 x 327 mm Features AVS , DuraLube with fuel pump and voltage regulator. This engine replaces all pre 2014 versions whether 8-9-10-11-12-13 horsepower, the only difference may be the position of the exhaust (muffler) which is not supplied, the output shaft is 25.4 mm (1 inch) by 80 mm. for more details please contact us. FOR ALL MAKES: STIGA CASTELGARDEN MTD ALPINA MOUNTFIELD HUSQVARNA PARTNER MURRAY JONSERED OLEOMAC EFCO SNAPPER VICTA YARD-KING YARD-MAN AGS AL- KO ARIENS AS MOTOR DEA CONCORD ETESIA VIKING WESTWOOD AYP IBEA JOHN DEERE NOMA SIMPLICITY TORO WALKER YAMAHA The warranty is ONLY valid when using SAE 30 lubricating oil, preferably BRIGGS STRATTON, which you can find in our store