Need an engine for a John Deere 790? The original 3TNE84 is an 84 mm Yanmar, and the 88 mm 3TNV88 is the replacement core that goes in its place. We hold it in both mechanical and common rail, new surplus and rebuilt, and we set it up to your compact utility tractor.
The John Deere 790 is a compact utility tractor built for small-acreage, property maintenance and light loader work. It is one of the most widely sold Yanmar 84 mm-bore applications in the United States.
ENGINE SPECIFICATION. Three cylinder, four cycle, liquid cooled, vertical in-line. Direct injection, naturally aspirated. Bore and stroke 88 x 90 mm. Displacement 1.642 L (100.2 cu in). Around 36 hp at 3000 rpm at full speed, less in machines governed lower. Dry weight approximately 341 lb (154 kg). Rotation counterclockwise viewed from the flywheel end. Engine as fitted to this machine: Yanmar 3TNE84. Production years: 1998-2005. Rated output in this machine: approximately approx. 30 hp.
WHAT WE FIT TO YOUR MACHINE.
On a compact tractor the engine bolts to the transmission housing and drives the PTO. The bellhousing, flywheel, PTO drive, oil pan and front pulley all have to match your tractor - these are external components and they carry over from the engine you are removing.
WHY THE 3TNV88 REPLACES THE 3TNE84.
Yanmar's TNV three-cylinder engines are one family on one architecture - same 90 mm stroke, same block design, same mounting and accessory layout. Only the bore changes: 82 mm (3TNV82A, 1.3