You demanded more power, whether powering commercial zero-turn mowers, concrete trowels, mud boats or more. Vanguard BIG BLOCK™ V-Twin engines continue to prove themselves in an array of demanding applications. The 37.0 Gross HP* / 993cc EFI/ETC features electronic fuel injection and electronic throttle control to deliver consistent power and fuel efficiency. The optional Oil Guard™ System allows you to go 500 hours between oil changes, saving time and money.