Description
Overview:
This Crankcase Assembly is a genuine Honda part for GX120U1 petrol engines (also compatible with GX120K1). It forms the main engine housing, supporting the crankshaft and keeping the lubrication system sealed. The body is a precision cast aluminium alloy in a natural silver finish for strength with low weight and good heat dissipation. Supplied with a crankshaft bearing and oil seal, it helps restore correct alignment and oil-tight operation after damage or wear. Built to Honda's OEM specification (OEM No. 12000-ZH7-425), it is designed for reliable service in small plant, generators and pumps using the GX120 platform. Ideal for routine engine rebuilds or repairs where the original crankcase is cracked, worn, or otherwise unserviceable.
Key Features:
- Genuine Honda OEM crankcase assembly for the GX120 series (U1/K1) ensuring correct fit and alignment
- Cast aluminium alloy housing for durability, corrosion resistance and efficient heat dissipation
- Supplied with crankshaft bearing and oil seal to simplify installation and reduce downtime
- Precision-machined bearing seats and gasket faces help maintain oil pressure and smooth running
- Restores crankshaft support, reducing vibration, noise and premature wear
- Built to Honda quality standards for consistent performance in daily professional and DIY use
- Compatible with a range of Honda-powered equipment models listed below
Typical Applications:
Used when rebuilding or repairing Honda GX120-powered equipment such as small generators, clean and trash water pumps, and light construction or garden machinery. Common in site generators (e.g. EG/EZ series) and water pumps (e.g. WD/WDP/WP series), where maintaining crankshaft support and oil sealing is essential for dependable starting, smooth running, and long service life.
Also known as:
Engine casing, crankcase housing, crank housing, engine lower case, crankcase body, engine block (GX120 engine family terminology varies).
Fits Models:
EG1400XK1, EZ1400, GX120K1, GX120U1, WD20XK1, WDP20X, WDP30X, WP20X
Alternate Part Numbers:
12000-ZH7-425, 12000ZH7425
Product Specifications
| L&S Part No. | 12000 ZH7 425 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 12000ZH7425 |
| Unit of Sale | 1 |
| Applications | EG1400XK1, EZ1400, GX120K1, GX120U1, WD20XK1, WDP20X, WDP30X, WP20X |
| Machine Type | Engines, Generators, Pumps |
| Fits Brands | Honda |
| Fits Models | GX120K1 (GC01) | GX120U1 (GCAHK) |
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