John Deere 4.5L marine engine made its debut at London Boat Show
The new John Deere PowerTechTM 4045SFM85 was showcased on the Barrus stand at this year’s London Boat show, joining the existing line-up of John Deere Marine Tier 3 propulsion engines.
The new 4.5L engine offers high power to weight ratio for repowering and new boats and is ideal for planing and semi-displacement hulls. There are two ratings for light-duty commercial vessels, high-speed governmental applications and high-speed pleasure craft, which includes an M4 rating with 205kW (275hp) at 2600rpm and M5 rating with 235kW (315hp) at 2800rpm.
The engine uses a waste-gated turbocharger that provides greater torque capability at low and middle rpm range, which is most notable during vessel acceleration. Replaceable cylinder liners make it possible to rebuild the engine for extended service life.
Additional features of the 4045SFM85 engine include:
- Standard front fuel service, optional left-hand or right-hand oil filter options for twin engine applications.
- Upgraded valve train. It delivers a 40% increase in power and a 9% reduction in total engine weight for a 53% increase in power density compared to the 4045AFM85.
- The low-profile heat exchanger reduces overall height by 1.7” (4.3cm) from the 4045AFM85.
- Water-cooled exhaust manifold creates a cooler and quieter environment for both passengers and crew.
The PowerTech 4.5L engine ratings will meet U.S. Environmental Protection Agency Marine Tier 3 and Recreational Craft Directive II emissions regulations, as well as International Maritime Organisation Tier II standards for commercial and recreational applications. The engine is pending approval by American Bureau of Shipping, DNV GL, Lloyd’s Register and Bureau Veritas and will be the only ABS-certified, 315hp, 4-cylinder inboard diesel engine.