4LHA-STP
Yanmar 4LHA-STP: 240 hp (177 kW) at 3300 rpm, 3.455-litre turbocharged, intercooled four-cylinder marine diesel, the top 4LHA-P rating.
The 4LHA-P ratings (4LHA-HTP, 4LHA-DTP, 4LHA-STP) are the second, longer-running generation of Yanmar's 3.455-litre four-cylinder marine diesel, with turbocharger, intercooler and fresh-water cooling. They were sold as bare engines for shaft installation with Kanzaki KMH50A or ZF gears (Yanmar's own drawings show KMH50A and ZF68A, and older leaflets ZF45A and ZF63A). As the -ZP versions they were prepared for MerCruiser Bravo One, Two or Three sterndrives.
The STP replaced the 230 hp 4LHA-STE and has a wastegate boost compensator for acceleration. Yanmar's leaflets show it with a ZF63A gear, and its current drawings show a Kanzaki KMH50A. The sterndrive version is the 4LHA-STZP.
Specifications
Power
- Power
- 240 hp
- Power (kW)
- 177 kW
- Rated speed
- 3300 rpm
Engine
- Configuration
- inline 4
- Cylinders
- 4
- Displacement
- 3.455 L
- Aspiration
- turbo, intercooled
- Weight
- 365 kg
- Fuel
- Diesel
- Mounting
- Inboard
Reviews
No independent reviews on file yet.
Sources
- 1. 4LHA-STP (Z) — Yanmar Marine International
- 2. Marine Main Engines for Pleasure Boat (LH), June 2002 — Yanmar Diesel Engine Co.
- 3. 4LHA-HTP / DTP / STP pleasure-craft leaflet (dealer-hosted copy) — Yanmar
- 4. 4LHA-HTZP / DTZP / STZP sterndrive package leaflet — Yanmar Marine
- 5. Search engines: powerboat, status current (January 2026) — Yanmar Marine International
- 6. Search engines: powerboat, status current (August 2020) — Yanmar Marine International
Specifications compiled from manufacturer sources.