Today we are the nation's largest remanufacturer of gas and diesel engines, transmissions, differentials, air and fuel components, marine engines, sterndrives, performance engines, and electric motors.

JASPER® remanufactured gas engines are built to meet or exceed original equipment manufacturer measured tolerances, and most applications are covered by a 3 year/100,000 mile nationwide, transferable parts and labor warranty.

A JASPER remanufactured gas engine includes a 3 Year/100,000 Mile Transferable Nationwide Parts and Labor Warranty (click here for details about the warranty). Nationwide Availability. JASPER stock replacement gas engines for most applications are available immediately from our huge inventory located at our distribution network across the U.S.

JASPER Engines & Transmissions was founded in 1942 and today is the nation’s largest mass remanufacturer of a diverse line of drivetrain components. Annual production includes 65,000 gas engines; 75,000 transmissions; 6,500 diesel engines; 5,000 differentials and rear axle assemblies; and 1,200 stern drives.

Every year, JASPER remanufactures over 6,500 diesel engines of all sizes and makes, from on-highway to off-road and industrial. If you have any questions or need help, feel free to contact our team. 800-827-7455

JASPER remanufactured gas engines are built to meet or exceed original equipment manufacturer measured tolerances, and most applications are covered by a 3 year | 100,000 miles nationwide, transferable parts and labor warranty.

From laid back cruising to wide open throttle, JASPER MARINE provides all the power you need and expect for your boating pleasure. Precision machining and quality parts, combined with thorough testing, give JASPER MARINE engines and you the edge in remanufactured inboard and I/O engines.

Off-road applications receive an 18 month/100,000 mile parts and labor warranty. Please visit our warranty page for complete coverage information on our transmissions and extensive line of quality remanufactured engines, differentials and more.

THE LARGEST remanufacturer of gas and diesel engines, transmissions, differentials, rear axle assemblies, air and fuel components, marine engines, sterndrives, performance engines, and electric motors.

JASPER® has been remanufacturing quality products since 1942 and today we are the nation's largest remanufacturer of gas and diesel engines, transmissions, differentials, rear axle assemblies, air & fuel components, marine engines, sterndrives, performance engines, and …