My engine's CPL is 8149 and rated at 91hp at 2000rpm.That engine serial number does not come up in Cummins Quick Serve. Found another engine of the same model with ESN 26378861. It doesn't show in Quick Server either but shows some specs. It is CPL 8148 and has 80 HP @ 2000 RPM. Appears to have a Bosch model A injection pump which is quite common for industrial engines. Governor speed of 2000 RPM seem kind of low but it may only be driving a hydraulic pump. There are some engines that do not show on Quick Server and only a Cummins shop can access those. Might contact member CrewCab59, He's a Cummins dealer.
I had an interesting moment yesterday: I went to clean the tag on the injection pump and discovered that the reason I didn't realize there was a tag there was because the tag was covered, very carefully, neatly and intentionally, with regular gray duck tape (which was covered in soot/dirt/grease).That injection pump is a Zexel, not a Bosch. If you'll clean the dirt off the area just below where the lines output I think there may be a tag or tags there. Below is a photo of a 6 cylinder model and you can see where the tags are. It doesn't look to be an embossed tag but just a foil one.
The parts includes just the rebuild kit.OK, you have an identity on the injection pump. The tape could have well been put there when the engine was being painted. Even at todays prices, $10,000 sounds a bit steep for a rebuild. These are not complex engines. The $3000 in parts may not be out of align depending on what all that covers. Many of our members do their own rebuild work except where some machine work may be required like boring the block. On most rebuilds you would replace gaskets, seals, bearings, rod bolts, and likely head bolts. All those parts would be $1000 or less with some shopping. If the engine needs boring then new pistons and rings would be required. Those can be found pretty cheap these days. Maybe around $400-500 for a complete set. Can even be cheaper with some shopping. If the turbo needs rebuilding those kits are around $100 or less. Do you know which turbo the engine has? It would have an ID tag too. If the injection pump needs rebuilding that will be more expensive. In the neighborhood of $1000. There could be some other misc parts like valves or lifters that may need replacing. Did the guy giving you the quote specify what parts are in that $3000? If your guys charge $100/hr for labor they are figuring 70 hrs. That seems a bit excessive. If the engine is out of the vehicle you can tear one down in a couple hours. If you went the route of buying a long block assembly, you may have to transfer your front gear housing to the new one. Lots to consider. Where are you located?