With an eye toward delivering a better overall customer experience in a number of product lines, Exmark unveiled two new Exmark-branded engines on Jan. 7. Developed specifically for Exmark zero-turn mower applications, the new 452-cc single- and 708-cc twin-cylinder engines offer a number of unique features designed to enhance performance, simplify maintenance, and increase durability.
According to Daryn Walters, Exmark’s director of marketing, development of the new engines began more than four years ago, and prototype engines have been exhaustively tested for performance and durability on the dyno, in the laboratory and in the field.
“The Exmark engines have been refined and proven through extensive durability and field testing,” said Walters. “We also tested the engines against similar engines from other manufacturers. Multiple comparison tests were made in heavy grass using identical mowers fitted with competitive engines.
“In all cases, performance of the Exmark engines was equal to or better than the other engines tested.”
Both Exmark engines feature overhead valve (OHV) designs to decrease fuel consumption and emissions and reduce engine operating temperature. Additionally, the engines are tuned for quicker, stronger governor response to deliver more power precisely when it’s needed. A wide power band gives operators the confidence to tackle challenging jobs without fear of stalling the engine.
Durability-enhancing features such as cast-iron cylinder liners, oversized crankshaft bearings and triple-ring pistons increase the long-term durability of both engines. Exmark is so confident in the engines that it offers a three-year warranty on both, with parts and warranty support available from more than 1,500 Exmark dealers across the nation.
Exmark also includes a QR code on each engine, which allows for scanning with a smartphone or tablet to provide the user with maintenance and service information for the engine, as well as specifications and other information.
Exmark 708-cc V-twin engine
Designed from the ground up as a zero-turn mower engine, the new Exmark 708-cc V-twin engine introduces a number of new performance and serviceability enhancements to the marketplace. The innovations bolster the professional-grade performance and durability of Exmark’s small- and mid-sized zero-turn riding mowers.
The innovative air intake design reduces dust and debris buildup with a constant flow of pre-screened air. The design of the air box cover and air filter virtually eliminate the possibility of an incorrectly installed filter allowing engine-killing dust and debris into the engine. Combined with a standard dual-barrel carburetor, the intake system delivers more air to the engine for increased power and fuel efficiency, and reduced operating temperature.
The Exmark 708-cc V-twin engine also features a vacuum choke override for increased startability and smoother running at startup.
A standard quick-drain system eases oil changes by offering the ability to drain oil without tools. The long drain hose eliminates the messiness traditionally associated with draining the oil from the engine, and the design dramatically reduces the time required for routine oil changes. The quarter-turn twist-lock dipstick design makes oil level checks quick and easy.
Exmark’s revamped Quest E- and S-Series machines are the first machines to be available with Exmark’s new twin-cylinder engine. The engine will be standard on Quest E-Series mowers with 42- or 54-inch cutting decks, and Quest S-Series machines with 42- or 50-inch cutting decks.
Exmark 452-cc single-cylinder engine
The new Exmark 452-cc single-cylinder engine is designed to deliver exceptional performance and durability in the company’s small zero-turn mowers. Tuned for the specific requirements of Exmark machines, the new single-cylinder engine features an OHV design to increase efficiency and decrease emissions.
An optimized balance shaft design reduces engine vibration, while an automatic compression release combines with electric starting to deliver quick, easy starts.
The Exmark 452-cc single-cylinder engine also introduces a number of features to ease maintenance and increase engine reliability.
Full-pressure lubrication and a standard dual-stage oil filtration system increase durability by delivering an ample supply of clean engine oil to vital engine parts. The air filter features easy, tools-free access to speed and simplify cleaning, and a quarter-turn dipstick makes it easy to check engine oil level, or add oil to the engine.
The new Exmark 452-cc single-cylinder engine will first be available on 34-inch Quest S-Series machines, with additional applications expected in 2015 and beyond.
Learn more about the new Exmark single- and twin-cylinder engines at http://Exmark.com/Exmark-Advantage/Recent-Innovations/Exmark-Engines.