SP Series – Features & Benefits
The Subaru SP Series air-cooled engine series utilizes Subaru’s chain-driven overhead cam technology. These engines are extremely compatible, easy to install, and simple to exchange with most existing slant cylinder engines. SP engines are ideal for powering pressure washers, tillers, go-karts and edgers.
The cast iron cylinder liner features better wear characteristics than the softer aluminum that surrounds it. This enhances reliability and extends engine life.
The forged high-carbon steel crankshaft provides maximum reliability, and the dual ball bearing crankshaft gives maximum stability under demanding loads.
Overhead cam technology and the pent-roof combustion chamber allow the engine to use a 9:1 compression ratio, increasing the power and improving efficiency and overall performance.
The overhead cam design maximizes cooling area and improves cooling performance. It also allows for 360-degree airflow around both the exhaust and intake valve stem.
An optimized-capacity rigid muffler and 33 percent fewer moving valve train parts than overhead valve designs equate to noise levels that are a full two decibels below competitive models.
Industry-leading technology offers superior power and reliability compared to competitive engines.
OHC design allows the intake and exhaust valves to be positioned for optimum performance.
A straight intake port reduces resistance to the flow of the air/fuel mixture to improve power and efficiency and reduce emissions.
