18 HP Vanguard Engine. The Small Block V-Twin Vanguard engine is designed-engineered to handle the most demanding commercial applications. Energetic and quick starting, these powerhouse engines feature a number of advanced technologies and integrated components, while also being lighter and more compact than leading competitor’s engines. Dura-Bore Cast Iron Cylinder Sleeve. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Lawn Mowers, Parts & Accessories\Lawn Mower Parts”. The seller is “outdoor_power_direct” and is located in this country: US. This item can be shipped to United States.