Subaru Industrial Engines continues its leadership in industrial-quality engine manufacturing with the introduction of two new big block V-Twin engines. The 35-horsepower EH90 and 40-horsepower EH99 meet a growing demand for larger, air-cooled gasoline engines that deliver increased power for a wider range of applications. The engines are ideal for equipment like utility vehicles, zero-turn mowers, chippers, stump grinders and wood processors.

The EH90 and EH99 are extremely durable, low maintenance and feature heat-reduction technology. Both engines are 999cc and feature heavy-duty connecting rods, large crankshaft bearings and three-ring pistons. The hardened exhaust valve and seats can handle high temperatures, which improves engine performance, efficiency and overall life of the engine.

These Subaru engines are designed to protect the owner’s investment and to assure that the engine performs at top efficiency over the full life of the engine. There are two conditions that can shorten the life of any air-cooled engine: high engine temperature and lack of lubrication.

Excessive engine temperature can cause severe damage to any air-cooled engine. High engine temperature is typically caused by debris blocking the cooling air intake or the cooling fins. These new Subaru engines include a unique temperature sensor that monitors the engine operating condition and sounds a loud alarm to warn the operator if the engine overheats. This allows the user to stop the engine and clear the debris to prevent damage to their engine.

Furthermore, both models are equipped with a low-pressure sensor that prompts an automatic engine shutoff when oil pressure gets too low. Pressurized lubrication systems keep the engine well lubricated by pumping oil directly to every critical bearing, even when a piece of equipment is operating at extreme angles. The pressurized lubrication system also allows the OHV (overhead valve) engine to use an automotive grade spin-on oil filter, which does an exceptional job of removing dirt and carbon solids to keep the oil clean and extend the time between oil changes. The engine also has an oversized oil cooler to reduce the temperature of the oil in the engine to extend oil life.

In addition, the standard four-cycle OHV gasoline engines feature a dual element air filter that protects the engine from dust and reduces maintenance. An optional Donaldson^® canister style air cleaner has an inlet pre-cleaner, which offers additional filtration by removing a majority of the particles before they reach the filter, thereby minimizing maintenance and extending the intervals between cleanings or filter changes. The engines come standard with a low-mount air filter.
Subaru’s new 5-year limited warranty.
The big block engines comply with all current EPA requirements and provide a viable alternative to diesel engines. Both engines are backed by Subaru’s 5-year limited warranty, the first and only 5-year warranty in the industry.