GB 78.5cc 4-Stroke OHV Gasoline Engine | 5/8" PTO Shaft

BLOWOUT SALE! Grab this rugged 78.5cc powerplant for only $119.95 while supplies last. Limited quantities available!

Looking for a reliable, compact, and punchy replacement engine for your custom mini bike, small go-kart, generator, or utility equipment? The GB 78.5cc OHV 4-Stroke Gasoline Engine delivers smooth, efficient overhead-valve performance in a lightweight, dependable package. Featuring a standard 5/8" horizontal PTO shaft and built-in ball bearings, it's designed to easily drop into standard mounting patterns with the supplied baseplate.

Whether you are building a custom pit bike or replacing an old utility motor, this 4-stroke engine offers excellent fuel economy, reliable pull-starts, and a compact footprint that fits where larger 212cc engines won't.

Key Features:

• Efficient OHV 4-Stroke Design: Cleaner running, quieter operation, and no more mixing gas and oil.
• Heavy-Duty Construction: Outfitted with premium ball bearings for reduced friction and an extended service life.
• Universal Utility: Ideal for project builds, custom mini bikes, small go karts, pumps, and light industrial machinery.

Technical Specifications

Dimensions & Mounting:

• Overall Engine Dimensions: 14.173" L x 13.582" W x 14.37" H (360mm x 345mm x 365mm)
• Mounting Base Pattern: 4.016" L x 4.094" W - 2.441" W (102.0mm x 104.0mm - 62.0mm)
• PTO Shaft Diameter: 5/8 IN.
• PTO Shaft Length: 2.366 IN. / 2.46 mm
• PTO Shaft Height: 3.582 IN. (with base 4.035 IN.) / 91 mm (with base 102.5 mm)
• PTO Shaft Keyway: 0.188 IN. / 4.78 mm
• Shaft End Tapped: 1/4 IN. - 28 (Diameter / Thread per inch)