This is the O.S. Max 30VG (P) ES Electric Start, Rear Exhaust Monster Truck Engine with Pilot Type Crankshaft.
Preinstalled E.S. Starter backplate is designed to use the DuraTrax Kwik-Pit Super Start for the HPI Savage or the HPI Roto Starter System (HPIP8711)
Same mounting dimensions as .21 size engines
Advanced Bi-Metallic Liner (ABL) cylinder liner construction
Machined aluminum piston, 3-port cylinder liner and double bushed knife edge connecting rod
21E single needle Slide Valve Carburetor with insulated sleeve to prevent fuel vaporization
SG (pilot) type oversized crankshaft with rubber-sealed front bearing and oversized rear bearing to handle high torque loads
Two year limited warranty
The O.S. Engines 30VG ES Electric Starter was designed to use the DuraTrax Kwik-Pit Super Start for the HPI Savage or the HPI Roto Starter System. The 30VG ES Electric Starter has the same mounting dimensions as .21 size engines, making upgrading easier.
The 30VG ES Electric Starter has advanced Bi-Metallic Liner (ABL) cylinder liner construction. This process uses a double layer of plating material rather than one thick layer. This helps the metal bond to the cylinder and makes it much more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression and longer life.
Includes: O.S. Max 30VG (P) ES Electric Start Monster Truck Engine, illustrated manual, #8 glow plug, #203 air filter, two foam filters, two air filter O-rings and preinstalled E.S. Starter backplate
Requires: Duratrax Kwik-Pit Super Start System or the HPI Savage Roto Starter System (HPIP8711) Car blend nitromethane fuel with 10-30% nitromethane content, 20% nitro content recommended as starting point
Displacement: 0.298 cu in (5.0cc) Bore: 0.728" (18.5mm) Stroke: 0.717" (18.2mm) Practical RPM: 4,000-36,000 Power Output: 3.0 PS, 2.96 HP/28,000 RPM Weight: 12.7oz (360g) Crankshaft Size: 1/4-28 Factory Needle Valve Setting: 2-3/4 turns OPEN from fully closed Mixture Control Valve Setting: Needle head flush with the side of ball link housing then back in 1-1/2 turn Distance Between Mounting Holes Same Side: 0.83" (21mm) Distance Between Mounting Holes Opposite Side: 1.4" (37mm) Distance Between Mounting Holes Diagonal: 2.3" (59mm) Height Bottom of Mounting Tabs to Top of Cylinder Head: 3.8" (97.7mm) Width of Mounting Tabs: 1.8" (45mm) Width of Crankcase Below Mounting Ears: 1.2" (30.8mm) Distance from Front Bearing to end of Crankshaft: 1.2" (29.5mm) Distance from Center of Engine to Front Bearing: 1.7" (44mm) Distance from Center of Engine to Backplate: 1.4" (35.6mm)
Needle Settings High Speed: 2 3/4 turns out from fully closed Metering Needle (low speed): flush with ball link body, then 1.5 turns in Throttle Stop Screw: 1/2mm open from fully closed