Iseki 1.1 L 3 Cyl Diesel

The Iseki 1.1 l 3cyl diesel is the engine Iseki E3112

For engineers specifying power packs in the 15–25 kW bracket, the Iseki 1.1 L E3112 (Iseki 1.1 l 3cyl diesel) offers a proven, emission-exempt architecture with wide parts support.

Price premiums on “new” units reflect dwindling stock; nevertheless, rebuildable cores are plentiful, and routine issues (return-line blockage, head cracking on turbo models) are well documented and preventable through updated service procedures.

The engine’s compact geometry, flat torque curve, and absence of DPF make it a logical candidate wherever low TCO and tight installation envelopes matter more than absolute power density.

Iseki 1.1 l 3cyl Diesel Specifications

Engine Type

Vertical, water-cooled, four-stroke, indirect-injection diesel. Factory designation Iseki E3112; some early build codes read “E3CD-E3112.” Known also as the Iseki 1.1 l 3cyl diesel

Displacement

1 123 cm³ total; bore × stroke 78 × 78 mm gives an undersquare layout that favours mid-range torque.

Power & Torque Output

Rated 22 hp (16.4 kW) at 2 600 rpm on the TXG23 agricultural calibration; industrial calibrations for pumps and mini-excavators are limited to 18 hp at 2 500 rpm for longer duty life. Peak crank torque is 64 N·m at 1 800 rpm (internal dyno sheet, nominal).

Fuel System & Consumption

Mechanical in-line pump (Zexel VE) with pintle nozzles at 160 MPa opening pressure. Specific fuel consumption measured on the GC1700 sub-compact platform is 285 g kW-¹ h-¹ at rated load, translating to ~2.1 L h-¹ when powering a 1 200 r/min mid-mount mower deck.

Emissions Compliance

With gross output < 19 kW the engine is exempt from EU Stage V and US EPA Tier 4 requirements; no EGR, DOC or DPF is fitted. This simplifies service and eliminates regeneration downtime

Dimensions & Weight

Block length 455 mm, width 430 mm, height 565 mm with flywheel housing; dry bare-engine mass 98 kg. Centre-of-gravity 140 mm above crank centreline to ease sub-frame mounting.

Application Range

Primary OEM uses: Iseki TXG23 / SXG22 ride-on mowers, Massey-Ferguson GC1700 series sub-compacts, compact excavators ≤ 1.8 t, and 10–15 kVA generator sets.

Reliability Metrics

Mean time between overhauls reported by fleet operators of GC1710 loaders is 6 000 h with 250 h oil-change intervals. At 140 h an owner survey on TractorByNet logged zero critical failures.

Other Potential Applications

Because the block is shallow and side-gear driven, the E3112 fits inside ISO 8528 G-frame gen-sets and can retrofit Kubota D1105 footprints when bell-housing adapters are machined. Oil-sump clearance limits it to <35° continuous tilt.

Indicative New/Used Price

Factory-new long blocks are no longer listed; re-manufactured assemblies sell for €1 750 – €2 200 ex-works EU. Core-credit used units trade from US $1 400 to US $2 200 depending on hours and compression test.

Price Analysis

Market segmentation is three-tier:

• Re-manufactured long block (zero-hour bench-tested). Typical dealer ask €1 750 – €2 500; warranty 12 months parts.
• Running pull-out. Dismantlers list crated engines at US $1 400 – US $1 800 plus freight; compression and blow-by numbers supplied on request.
• Core or non-runner. Auction platforms or eBay lots range US $600 – US $900, suitable for rebuilds where crank and rods remain serviceable.

New production ceased when Iseki switched sub-25-hp tractors to the Stage-V compliant 1.35 L E3126 in 2023, so today’s “new” inventory is NOS (new-old stock). Expect prices to creep up 3 – 5 % annually as remaining inventory declines.

Availability: Engines for Sale & Procurement Channels

For customers in European time zones, transit from EU warehouses avoids 5–10 days customs delay seen with U.S. exports since about July 2025

Review of the Iseki 1.1 L 3-Cylinder Diesel

Field owners consistently note low vibration and idle noise—measured 78 dB(A) at operator ear on a GC1725M at 2 600 rpm. The indirect-injection chamber tolerates off-road ULSD down to 47 cetane without injector coking. Independent comparison bulletins for the Massey-Ferguson GC1700 and LS MT1 sub-compacts cite “no emissions after-treatment” as a maintenance advantage over Tier-4 mini-DPF competitors.

Cold-start surveys: glow-plug pre-heat of 8 s at –5 °C, crank 1.3 s average to fire when battery > 80 % SOC and 15W-40 CJ-4 oil is used. Oil reports at 500 h show iron < 50 ppm and fuel dilution < 1 %, indicating ring seal integrity is good up to first overhaul. Fuel consumption on a 60-inch mid-mount deck averages 1.9 L h-¹—10 % lower than a Kubota D1105 in identical service.

Common Problems & Failure Modes

Overall, failure incidence is low; most issues trace to maintenance omissions rather than inherent design weakness.

Iseki TXG23 Case Study (Engine Integration & Performance)

The TXG23 compact utility tractor mates the E3112 to a two-range hydrostatic transaxle. Engine governor is set 2 600 rpm, yielding 22 engine hp and 17.5 hp at rear PTO (efficiency 79.5 %). Factory service data show oil capacity 2.6 L and coolant 4.6 L; valve lash 0.254 mm hot on both inlet and exhaust.

Field dynamometer pulls with 48-inch aerator exerting 10 kN drawbar load held 2 200 rpm without stalling, confirming 60 N·m torque reserve. Operators cite 78 cm under-hood clearance simplifying belt changes. The compact block lets the TXG23 keep a 55° steering angle even with mid-mount PTO gearbox.

Comparatively, Kubota BX2380 (D902 engine) delivers similar PTO hp but requires DPF as of 2024 Stage V, raising maintenance. Thus, the TXG23 remains popular in municipal fleets needing zero-DPF architecture.

Iseki E3112 Variant Comparison

Compared with the successor E3126 (1.35 L), the E3112 is 40 kg lighter and 8 % more fuel efficient below 70 % load, but cannot meet Stage V without costly after-treatment modules. For users in power-class exempt niches—sub-compact tractors, standby gensets—the E3112 remains a cost-effective, service-friendly choice.

AGCO ST25 (24 HP) Compatibility with the Iseki 1.1 L Engine

Factory Engine Fitment

The AGCO ST25 compact utility tractor (2001-2004) was factory-equipped exclusively with the Iseki E3112 1.1 L three-cylinder diesel. TractorData, Heavy-Equipment-Specs and OEM parts books all list the E3112 as the sole engine option—power 24.3 hp gross @ 2 800 rpm; displacement 1.1 L; bore/stroke 78 × 78 mm.

Retrofitting / Swap Viability & Key Steps

Because the ST25 already uses the E3112, installing a replacement or upgrading to a later E3112-spec long block is straightforward—no custom mounts or driveline adapters are required.

A specialist mechanic would typically proceed as follows (outline only):

1. Preparation
   • Block tractor, disconnect battery, drain coolant & oil.
   • Remove ROPS top section and loader frame (if fitted) for crane access.
2. External Component Removal
   • Detach hood, side panels, radiator assembly, exhaust stack.
   • Label and disconnect engine-wire harness, throttle cable, fuel lines, and hydrostatic charge-pump coupler.
3. Power-train Separation
   • Support hydro/gear transaxle with cribbing.
   • Unbolt SAE 5 bell-housing (six M12 fasteners) and slide engine forward 60 mm to clear input shaft.
4. Install Replacement E3112
   • Confirm replacement flywheel matches 228 mm clutch and pilot diameter; swap ring gear if starter tooth count differs.
   • Fit new pilot bearing, clutch disc (Ø 215 mm) and align.
   • Torque bell-housing bolts to 78 N·m with thread-locker.
5. Ancillary Re-assembly
   • Re-install radiator (verify core fins clean), connect fuel supply/return ensuring unrestricted return line.
   • Bleed fuel system at filter banjo and injector nuts.
   • Refill engine oil (2.7 L 15W-40) and coolant (7.5 L 50/50 EG).
6. Commissioning
   • Static timing check (pump scribe @ 10° BTDC).
   • Glow-plug current test (9 A per plug).
   • 30-min break-in at 1 800 rpm/50 % PTO load; monitor oil pressure (≥275 kPa) and coolant (<95 °C).

Viability: 100 %—the ST25 chassis, wiring, fuel, and cooling are all native to the E3112. Convenience: high; swap can be completed in ≤ 8 labor-hours with an overhead hoist and standard metric tooling. Caveats: If sourcing an industrial-map E3112, verify governor linkage and speed-setting springs are swapped to agricultural spec (2 800 rpm rated) to regain full PTO horsepower.