Aceup Energy Gas Engine Vertical Shaft – 4.4HP 173cc OHV with Primer Start, EPA Compliant

Overview

Power your lawn equipment with the Aceup Energy gas engine, a compact vertical‑shaft 4‑stroke unit designed for dependable performance in outdoor tools. With a 173cc displacement, it delivers up to 4.4 HP at 3600 RPM and is engineered to fit a range of mower or small‑utility applications. A modest 0.9 gallon fuel tank keeps maintenance downtime low, while the recoil start offers a familiar, tactile startup experience.

Key specifications and setup

• Displacement: 173cc, 4-stroke OHV, air cooled
• Max torque: 8.5 N·m at 2500 RPM
• Max load speed: 2500–2800 RPM; peak power at 3600 RPM
• Power output: up to 4.4 HP
• Fuel capacity: 0.9 gallon
• Shaft specs: 7/8" diameter, 3.16" long; end tapped 3/8-24 UNF; keyway 3/16"
• Starting assist: recoil start with enrichment pump and primer

Durability and build quality

Designed for longevity, the engine uses metal cams, a forged crankshaft, and cast iron cylinder liners to resist wear and maintain smooth operation over time. Every engine that leaves the factory is EPA compliant and functionally tested for reliability.

Usage, benefits, and support

• EPA compliance supports responsible usage and adherence to standards
• 1-year limited warranty backed by free lifetime technical guidance from Aceup Energy experts
• Suitable for powering lawn mowers and other small machines, with a straightforward cold-start sequence using the primer

Practical notes: For a first cold start, press the red primer 3–5 times, then pull the recoil start. On a hot restart, you may skip priming. The combination of strong torque, a compact footprint, and robust components helps support routine maintenance tasks and hobbyist projects alike. As with any engine, performance will vary with load, mounting, and fuel quality, but the unit is designed to offer a dependable starting experience and consistent power under typical outdoor-use conditions.