Remanufactured Long Blocks

Need to replace your engine but you don’t have time for a complete rebuild?

We stock Long Blocks for the most common models for CAT and Cummins. Typically a complete rebuild can take anywhere from 6-10 weeks, the long block provides a quicker turn around. We stock most long blocks for C13 (KCB), C15 Acert (MXS), C15 (6NZ), C12 (2KS), 3126, C7, B Series (4B 3.9, 6B 5.9, 6C 8.3), and N14.  Our Long Blocks include a remanufactured block, New or reman cylinder head(s), reman or new crankshaft, new clyinder kits, connecting rods, camshaft (some applications), piston cooling nozzles, gear train (some applications), gaskets needed to finish build. 

Contact us for a quote today!

We ship nationwide!

Quotes Require an Engine Serial Number

Contact Us Today


Our company strives to provide our customers with an engine that is better than the original. Our goal is to get our customer’s back up and running as quick as possible, we understand that your time is valuable. Our key to propmtness is having a large inventory of the most common engine parts and pieces. Stocking long blocks on the shelf helps customers like yourself have little down time! Since we machine and reman right here in-house that means we are in control of our lead times and quality. Machining our own engine components means we have the egde to lead time, precision, and quality.

Our long blocks include OE blocks that are machined to STD/STD. For example Our C13 long blocks include a remanufactured block (in-house), brand new loaded cylinder head, new cylinder kits, new camshaft, new or reman crankshaft, machined connecting rods (in-house), Piston Cooling Nozzles, Cam Followers, Front Gear Train, Front Gear Housing, Front Cover, and Gaskets Needed to Complete Build.

We GUARANTEE the satisfaction and quality of our product that we deliver to you!

We offer Short, Long and Extended Long Blocks for most popular CAT and Cummins engines. Our remanufactured long blocks meet or exceed OEM standards.

A short block includes engine block, crankshaft, connecting rods, cylinder kits, and piston coolers.

A long block includes all of the above including a cylinder head, cmashaft (some applications), and front cover(some applications). An extended long block has everything a short and long black has in addition to a camshaft, front cover, and gear train. (Injectors, rocker arms, push rods, and bridges are additional for a tune-up. Extended long blocks will be timed. We use new or reman parts. Our reman parts are machined to OEM specifications.

We service all applications 

Industrial- On-Highway- Marine

Caterpillar Diesel Engines are one of the most popular diesel engines sold. The name Caterpillar is well-known throughout the country and globally as well. They have been in business for over 90 years and continue to grow. Caterpillar is one of the most reliable diesel engines around. They are used in a variety of equipment for many industries across the board.

Agriculture • Construction • Defense • Forestry • Generators • Mining • Production • Rail • Recreational • Commercial Industrial • Trucks • Semis • Yachts • Vessels / Ships


Service Your Engine

Contact us today to have your engine remanufactured, or for more information about our remanufacturing process.


Shop our current inventory of remanufactured engines, engine kits, and parts.

Our Warranty Program

At Fisher Power Supply we work hard to ensure the quality of our workmanship and the products we use. We offer a 1-year unlimited miles/hour parts warranty on our all our remanufactured Diesel engines. For more information on our warranty program click here.