2001 Engine Preview Page 14

Engine Overview
Engines — By the PMY staff

Diesels —
John Deere
2001 Engine Preview

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• John Deere

No, this is not a misprint or a prank. The company you know best for farm equipment and lawn tractors is getting into the pleasure marine market. Deere is introducing three propulsion engines for 2001, all in-line sixes and all available in four ratings designated M1 through M4. Designations are based upon the amount of time the engines can be run at full power, M1 being continuous and M4 being one hour out of every 12. There are also maximum yearly engine-hour limits, ranging from 3,000 to 8,000. The 6.8-liter 6068TFM is available with ratings from 154 to 225 hp, the 8.1-liter 6081AFM from 235 to 375 hp, and the 12.5-liter 6125AFM from 340 to 450 hp.

As you'd expect given the John Deere pedigree, these engines have been designed more for durability, longevity, and fuel efficiency than for light weight and performance, which explains why a pair of the 6125AFMs were recently installed in a Grand Banks 46. They tend to be comparatively heavy for their output. The 450-hp 6125, for example, is listed at 2,695 pounds, giving it a weight-to-horsepower ratio of nearly six to one. Far more important to the displacement market for which they were designed, however, are features like a choice of wet or dry exhaust systems and keel or heat-exchanger cooling systems and standard washable air filters and closed-crankcase venting systems.

John Deere (800) 533-6446. Fax: (319) 292-5075. www.deere.com/jdpower

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This article originally appeared in the May 2003 issue of Power & Motoryacht magazine.

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