Yanmar Engine - LH Series
Extremely compact and lightweight. Very powerful. Transmission is a 7 degree down angle (bi-rotational). Also designed to cleanly replace gas V-8 engines. Larger Hp models. A=Built in USA. Available as both inboard and Mercruiser Stern Drive packages. This series includes the following engines:
| Engine | HP | Years In Production | Comments |
| 4LH-DTE | 170 | 1990 - 2000 | Replaces 350 GM |
| 4LH-HTE | 140 | 1988 - 2000 | Turbo-Intercooled |
| 4LH-STE | 230 | September 1995 - August 1998 | Replaces 454 GM |
| 4LH-TE | 110 | 1988 - 2000 | Turbo |
| 4LHA-DTE | 190 | June 2000 - August 2001 | Upgrade from 170 |
| 4LHA-DTP | 200 | August 2001 - Present | Higher Hp, US Built |
| 4LHA-DTZE | 190 | Spring 2000 - August 2001 | Merc I/O Package |
| 4LHA-DTZP | 200 | August 2001 - Present | Merc I/O Package |
| 4LHA-HTE | 150 | Spring 2000 - August 2001 | Turbo-Intercooled |
| 4LHA-HTP | 160 | August 2001 - Present | Higher Hp, US Built |
| 4LHA-HTZE | 150 | Spring 2000 - August 2001 | Merc I/O Bravo |
| 4LHA-HTZP | 160 | August 2001 - Present | Merc I/O Package |
| 4LHA-STE | 230 | September 1998 - August 2001 | Waste gated, US built |
| 4LHA-STP | 240 | August 2001 - Present | Higher Hp |
| 4LHA-STZE | 230 | August 1999 - August 2001 | Merc I/O Bravo |
| 4LHA-STZP | 240 | August 2001 - Present | Merc I/O Package |