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.

subaru-engines-cast-iron-cylinder-liner
subaru-engines-cast-iron-cylinder-liner

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.

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Durability
subaru-engines-combustion-chamber
subaru-engines-combustion-chamber

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.

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Efficiency
subaru-engines-cooling-fins
subaru-engines-cooling-fins

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.

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Advanced Cooling
subaru-engines-rigid-muffler
subaru-engines-ridgid-muffler

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.

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Quiet Operation
subaru-engines-chain-driven-overhead-cam
subaru-engines-chain-driven-overhead-cam

 

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.

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Overhead Cam Technology
3 1 Warranty_Subaru small

We lead the way in customer service too. And our warranty policy is no exception. SP Series is covered by Subaru’s 3-year residential and 1 year commercial limited warranty. Enjoy a guaranteed, hassle-free claim process, where all “ties” go to the customer. We believe it’s about more than just superior engines – it’s investing in superior service and peace of mind.

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3/1-year Warranty