Ford Lehman marine diesel engines are celebrated for their legendary reliability and simplicity, offering significant value to boat owners, especially those with older trawlers and displacement hull vessels.

Based on robust Ford industrial blocks, these naturally aspirated, low-RPM engines are known for their ability to run for thousands of hours with proper maintenance, often outlasting the boats they power.

Their mechanical design means less reliance on complex electronics, making them easier to diagnose and repair by both professional mechanics and resourceful owners, even in remote locations.

Common models like the 120 HP are highly regarded for their fuel efficiency at cruising speeds, contributing to lower operating costs.

While new engines are no longer produced, a strong aftermarket for parts, notably from specialized companies like American Diesel, ensures continued support and extends the lifespan of these durable workhorses, solidifying their value in the used boat market.