This is a direct 3TNV88 machine - the Cub Cadet SX3100 was built around this engine. We sell it new surplus and rebuilt, in mechanical injection and in electronic common rail, configured to your compact tractor.
The Cub Cadet SX3100 is a compact utility tractor powered by the Yanmar 88 mm-bore 3-cylinder direct-injection diesel.
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: 3TNV88. Production years: 2005-2015. Rated output in this machine: approximately approx. 31-36 hp.
WHAT WE FIT TO YOUR MACHINE.
On a compact tractor the engine bolts to the transmission housing and drives the PTO. Bellhousing, flywheel, PTO drive, oil pan and front pulley are all external and carry across from your old engine.
MECHANICAL OR COMMON RAIL - THIS IS THE ONE THING YOU MUST MATCH.
The Yanmar 3TNV88 comes in two fuel systems and they are not interchangeable. MECHANICAL INJECTION uses a mechanical pump and governor, with no ECU or sensors - this is what most machines in the field run, and it is our standard stock. ELECTRONIC COMMON RAIL (HPCR) is ECU-controlled, fitted to machines built to the later emissions standards. We carry both, in new surplus and rebuilt.
The suffix on your data plate - codes like -BKMS, -BPTB2, -QTB - does not mean a different engine. The core is the same across the family: same block, same crank, same 88 x 90 mm bore and stroke, same 1.642 L. The suffix tells you the fuel system and the accessory package. The accessories are external and swap; the fuel system is what has to match.
Two other variants to know about: the 3TNV88F has an ELECTRONIC GOVERNOR with EGR and is a different engine again, and the 3TNV88-GGE is a fixed-speed GENERATOR engine, not a machine engine. There is also a 4-CYLINDER 4TNV88 that is not the same as this three-cylinder engine at all.
Full breakdown of every variant, and how to read your data plate: see our Yanmar 3TNV88 engine buying guide.
BEFORE YOU ORDER.
Send the data plate off your Cub Cadet SX3100 - model number, suffix, serial. We will confirm whether you need mechanical or common rail, check the cylinder count, tell you what bolts across from the engine you are removing, and quote you on the correct core. New surplus and rebuilt both available.