Subaru Snow Power Series

5.7-9.5 HP

Subaru Engine SX30The Snow Power Series Engines are specifically designed for snowthrower applications. These engines run in sizes from 6 to 9.5 hp with current models starting at 6, 7 and 9.5 hp. The engines are identical to our famous EX Series Overhead Cam industrial engines, with the addition of the cold and now weather options listed as standard features.

Models: SX17 Snow Power, SX21 Snow Power, SX30 Snow Power

The SX Series industrial engines are designed for extreme weather conditions, making them ideal for snowthrowers.

  • Easy Start in Cold Weather
  • 120 Volt Electric Starter
  • Large Easy to See Primer Button
  • Safety Key Switch
  • Large Easy to Remove Gas Cap
  • Large Easy to Grab Recoil Handle
  • Easy to See Throttle and Choke Knobs
  • Overhead Cam Chain Drive Industrial Engine
  • Special Snow Guards for Keeping Snow out of Linkages and Recoil
  • Safety Gasoline Run-Off Tray
  • Limited 3-Year Warranty

Easy to Use Controls

The controls and buttons are large, easy to see and user-friendly.

Special Snow & Ice Guards

These specifically designed snow guards are strategically placed to keep snow and ice from vital controls and linkages.

Snow Power Engine Features

These specifically-designed features are added for customer safety and ease of use.

Specially Designed Recoil Housing

This specially designed recoil housing prevents snow and ice buildup from entering the flywheel and recoil components.

Carburetor Drain Screw and Translucent Fuel Cup

Drain fuel for storage when not in use with the easy to remove screw. Also, a translucent fuel cock strainer cup is included for inspection and removal of water and dirt particles that might enter the fuel tank and lines.

Cast Iron Cylinder Liner

Cast-iron cylinder liners enhance reliability and extend engine life.The cast iron cylinder liner has much better wear characteristics than the softer aluminum that surrounds it, making engine life much longer than if the piston is in contact with the aluminum cylinder wall.

Dual Ball Bearing Crankshaft Support

Dual ball bearing crankshaft support offers maximum stability under demanding loads.

Patent-Pending Main Bearing Cover Design

An internally structured main bearing cover offers patent-pending technology by creating a highly rigid engine system.

Forged High-Carbon Steel Crankshaft

Forged high-carbon steel crankshaft provides maximum reliability under demanding loads, thus providing longer engine life. The drop forging process increases the strength and durability of the crankshaft by re-aligning the molecules in the steel. This process hardens the complete crankshaft. Most engines use cast steel crankshafts that have induction hardened surfaces – only a few microns deep.

High Power Pent-Roof Design

Overhead Cam (OHC) technology and the Pent-Roof combustion chamber allow the Subaru SX engines to use a higher compression ratio of 9:1. The higher compression ratio increases the power produced for a given size engine. It also improves efficiency and overall performance.

High Efficiency Intake Port

The illustration shows the straight intake port on the right side of the picture. The lower resistance to the flow of the air/fuel mixture improves the power, efficiency and lowers emissions. Overhead Cam (OHC) technology allows the intake and exhaust valves to be positioned for optimum performance.

Timing Chain Oil Lubrication System

One of the purposes of the timing chain system is to lubricate the upper portion of the cylinder head. The timing chain is engaged between the sprocket portion of the integrated camshaft in the cylinder head and the crankshaft gear sprocket. The sprocket teeth are designed to enhance the durability and realize low noise level.

Camshaft with Automatic Decompression Release

The camshaft and the sprocket are made of special sintered alloy and constructed as a single piece. The camshaft is provided with intake and exhaust cam in one cam lobe. The decompression release lever is mounted on the sprocket end side.

Automotive Collets and Forged Steel Valve Retainers

Subaru EX engines use automotive quality collet valve retainers for longer life.

Intake Valve Seal

Special machining on cylinder head allows the oil seal to be placed around the valve guide. This seal reduces oil consumption and is replaceable for service. Hardened Steel Rocker Arms Hardened steel rocker arms with precision tappet adjusters are used for greater durability and reduce service requirements.

Patent Pending Connecting Rod Dipper

The EX lubrication system begins with a patent pending oil scoop to project the oil to the chain.

Aluminum Alloy Die-Cast Connecting Rod

The connecting rod is a specially heat-treated aluminum alloy die-casting, Its large and small ends function as bearings. A splasher built into the connecting rod lubricates by splashing engine oil. The piston is an aluminum alloy casting with grooves for mounting compression and oil rings.

Special Cooling Fins

Cooling fins are cast into both the inside and the outside of the crankcase to utilize every possible cooling area.

Mountng Base Cooling Fins

The unique Subaru cooling system extends to the underside of the mounting base. Air is forced over special cooling fins at the bottom of the engine for maximum cooling.

Cylinder Head 360 Degree Cooling

Head cooling is critically important to long engine life. The Overhead Cam design allows for 360 degree air flow around both the exhaust and intake valve stem areas.

Patent-Pending Cylinder Cooling Fins

Air is forced over the large slanted cooling fins on the cylinder for improved cooling performance. This design is patent-pending.

Patent-Pending Valve Cover Design

A patent-pending rocker cover design constantly supplies an optimum amount of oil to the cam shaft and rocker arm even if the engine is inclined.

Patent-Pending Breather System

A patent-pending breather system with a pre-separation passage prevents oil from spouting even if the engine is inclined.

Ignition System

The ignition system is a transistor controlled magneto with the ignition timing set at 23 degrees before top dead center. The magneto consists of a flywheel and ignition coil.

Optimized Capacity-Rigid Type Muffler

Optimized-capacity rigid muffler and 33 percent fewer moving valve train parts than OHV designs, reduce mechanical noise levels a full 2 decibels below competitive models.

NO Special Tools Needed

Even though the SX series engines bring the latest technology, performance, and durability to the industrial air cooled engine market, there are no special tools required to work on them. Most shop tools that small engine mechanics currently own will also work on these engines for service or complete tear down. Subaru engineers have achieved their commitment to ‘keep it simple’ while utilizing the latest technology.

Three-Year Limited Warranty

Subaru provides a three-year limited warranty. See warranty policy for details.

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