Check the listing for details. Briggs & Stratton Vertical 17.5 HP 500cc INTEK 9amp 1" x 3-5/32" #31R977-0054. Condition: New. Listed at 699.00 USD. Briggs & Stratton Vertical 17.5 HP 500cc INTEK Engine 9amp 1" x 3-5/32" #31R977-0054 Briggs & Stratton 17.5 HP INTEK Series 500ccDiscover a new standard in reliability. The powerful Intek™ Series riding mower engines deliver superior performance and durability. The XRD incorporates dozens of endurance-driving improvements, joined by the comfort of an Anti-Vibration System and the convenience of a Tool-less Air Cleaner Cover. It's riding mower engine you can rely on. MODEL NUMBER:31R977-0054POWER OUTPUT:17.5 Horse PowerSHAFT MOUNTING:Vertical ShaftSHAFT SIZE: (D x L)1" x 3-5/32" shaft, tapped 7/16" with 1/4" keywaySTARTER TYPE:Electric StarterAPPLICATION(S):Riding Mower EngineWEIGHT:90 lbsREPLACES:Universal replacement engine for MTD, Murray, AYP,Snapper, and other riding mowers and lawn tractorsWARRANTY:2 Years Consumer / 1 Year Commercial Covered Through Briggs & Stratton Service Network NOTES/FEATURES:17.5hp Briggs & Stratton OHV1" x 3-5/32" shaft, tapped 7/16" with 1/4" keyway.Cast iron sleeve, AVS patented linear balancing system, electric start w/ 9amp alternator, Less fuel tank, less muffler.Fuel pump is includedUniversal replacement engine for lawn tractors, garden tractors, and wide area walk behinds.2 year consumer/ 1 year commercial warranty.Model 31R977-005490 lbs