Description
Overview:
The Oil Pressure Switch is a compact, metal-bodied electrical switch used to monitor engine oil pressure and trigger a warning light or shutdown system if pressure drops too low. Built for small diesel engines commonly found in construction and garden equipment, it is a direct replacement for Yanmar OEM number 183250-39450. The robust housing with a hex body and a single spade terminal makes it simple to fit and connect. Designed to suit Yanmar L-series engines such as the L40 and L70, it helps protect engines from damage caused by low oil pressure, supporting reliable day-to-day running. Ideal for routine maintenance or a straightforward like-for-like replacement, it restores correct oil pressure monitoring so your equipment can operate safely and efficiently.
Key Features:
- Direct replacement for Yanmar OEM 183250-39450
- Helps prevent engine damage by signalling low oil pressure conditions
- Durable metal housing with hex head for easy tightening with a standard spanner
- Single spade electrical terminal for quick, clean connection
- Compact, universal-style form factor suited to tight engine bays
- Designed to withstand vibration, heat, and typical site conditions
- Compatible with a wide range of Yanmar L-series engines
- Supports warning lamp or low-oil shutdown circuits where fitted
- Straightforward fitment to minimise downtime during maintenance
Typical Applications:
Commonly used on small diesel engines powering generators, plate compactors, water pumps, pressure washers, mowers, and light plant. Suitable for site equipment and garden machinery using Yanmar L-series engines. Replace as part of preventative maintenance to restore reliable oil pressure monitoring and ensure the engine's protection systems work correctly in daily use.
Also known as:
Oil pressure sensor, oil pressure sender unit, oil switch, low oil pressure switch, oil pressure cut-out switch. These terms are often used interchangeably for the same function: completing or breaking an electrical circuit based on oil pressure to drive a warning light or engine protection system.
Fits Models:
170F, 178F, 186F, L100, L100N, L40, L40AE, L48, L60, L60AE, L70, L75, L90, L90AE
Alternate Part Numbers:
183250-39450, 18325039450
