Before you buy an engine for a Gehl SL4240, check the cylinder count - this is a platform where three-cylinder and four-cylinder Yanmars both turn up. We carry the 3TNV88 in mechanical and common rail, new surplus and rebuilt, and we confirm which engine your machine actually takes before anything ships.
The Gehl SL4240 is a mid-frame skid steer loader. CYLINDER COUNT WARNING: this platform was supplied with EITHER the 3-cylinder Yanmar 88 mm engine OR the 4-cylinder 4TNV88 (2.190 L, approx. 46 hp) depending on build and market. Gehl's factory engine parts manual 917329 covers both the 3TNV88-BKMS and 4TNV88-BDMS for the 3640 / 3840 / 4240 platform. Confirm the cylinder count on your data plate before ordering - the 3-cylinder and 4-cylinder engines are not interchangeable.
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 / 4TNV88. Production years: 2000-2010. Rated output in this machine: approximately 36 hp (3-cyl) or 46 hp (4-cyl).
WHAT WE FIT TO YOUR MACHINE.
On a skid steer the engine sits transversely behind the operator, driving the hydrostatic pumps directly. The bellhousing, pump coupler, oil pan and cooling package all have to match the machine - they are external parts and they come across from the engine you are replacing.
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 Gehl SL4240 - 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.