20 HP Vanguard Engine Outline Drawings

Air Cleaner Side Front View Oil Filter Side Oil Fill Side PTO Side View Footprint Crankshaft Data

Raptor III Engine Outline Drawings

Top Front Side Back Cutaway

Raptor II Engine Outline Drawings

Top Front Side Back Cutaway

WaZoom Racing Engine

What is it? The WaZoom engine is an “out-of-the-box, ready-to-race” modified engine built by West Iowa Tool. It was developed in response to the needs of tracks and associations who have expressed an interest in making the process of racing easier. All WaZoom engines come with a Total Seal crankcase to simplify and speed the […]

Identification numbers on Briggs & Stratton engines

Update your Raptor to Raptor III Specs

The new components which make Raptor II engines race friendly can be added to earlier Raptor and other Briggs & Stratton model 13 engines. Valve Guide (Oil Impregnated Bronze – large O.D. – .378) 555214 Midnight Bronze Blower Housing 555017 Cylinder head – not shot blasted 555199 Crankshaft – induction hardened crankpin and “slip fit” […]

What is float height and how do you set it on the Animal / World Formula?

What is float height and how do you set it on the Animal / World Formula? The float height controls the fuel level in the bowl of the carburetor. As the engine runs and draws fuel from the bowl, the float drops and the float height adjustment determines the point at which the inlet needle […]

Oil Levels and Lubrication

Lubrication Lubrication of a combustion engine is difficult due to the high temperatures and fluctuating high loads exerted. The lubricant chosen must perform several functions including the following: 1. Must have a suitable viscosity to carry heat from the engine. 2. Oiliness, to ensure adherence to the bearing for less friction and wear. 3. High […]

Raptor II racing engine (Briggs & Stratton)

Production Dates: January 1997 – December 2000 In early 1997, Briggs & Stratton began production of its Raptor II racing engine. This version of the racing engine continued to dominate karting, jr. drag racing, as well as many other areas of racing until the Raptor III, the third version of this series, began production in […]

Raptor racing engine (Briggs & Stratton)

Now replaced by the Raptor III, Raptor engines can and often are raced “out of the box.” They are built, however, with the intention of being blueprinted (built for customization) for the type of competition in which they will be used. All Raptor racing engines are “4-Cycle” (sometimes called 4-Stroke) side-valve (flathead) designs. There are […]