The 4B3.9 is a 4-cylinder in-line/rotary fuel system design that has the power you need and the reliability you demand. Like all B Series engines, it is a proven power plant with mechanical fuel injection that meets ecological concerns in a highly efficient package.

Features and Benefits:
Painstaking attention to details makes every B Series engine reliable and durable. They’ll be on the job, for years to come.

Heavy-duty components include:

• Forged steel camshafts & crankshafts
• Plateau-honed cylinder liners
• Wastegated turbochargers
• A parent-bore cylinder block built to handle high pressures
• Rotary fuel pumps
• Edge-molded gaskets