Description

Yanmar YM 1500, YM 1600, YM 1700, YM 1900, YM2000 1974 Parts Catalog

I’ve lost count of how many times a job ground to a halt because someone ordered the wrong piston ring set or spent an hour cross-referencing aftermarket numbers that didn’t match. That’s the kind of waste this 95-page factory catalog eliminates. If you’re working on any of the 2TR-series engines—YM 1500, YM 1600, YM 1700, YM 1900, or the YM2000—you need the part numbers straight from Yanmar, not some rekeyed third-party list. This is the July 1974 revised edition (YP7408-01), covering all design changes up to June 1974, including the new 2TR15, 2TR17, and 2TR20 models.

Parts Code Structure: How Yanmar Organizes the Numbers

Page 3 of the catalog breaks down the 11-digit part number into five segments: type code, product code, section code, and design-change code. The type code’s first digit tells you if it’s a single part (1) or an assembly (7). Product code identifies which engine family the part belongs to—for instance, 01104 means F4E series. Section code (like 22) groups parts by engine area: pistons, rings, pins all fall under 22. Design-change code tracks revisions. You don’t need to memorize it, but understanding the structure saves you from ordering a part that looks right but doesn’t fit the serial number range.

Interchangeability Codes: A, B, C, D, and E

Right on pages 4-5, the catalog uses single letters to tell you whether a new part replaces an old one. Code A means old and new are interchangeable both ways. Code B means they are NOT interchangeable—order only after confirming your engine serial number. Code C means the new part supersedes with interchangeability. Code D means discontinued. Code E means newly added. I’ve seen guys ignore the B code and end up with a cylinder head that won’t bolt on. This is the kind of detail aftermarket lists leave out because they just copy the part number column.

7 Systems Covered in This Parts Catalog

The catalog is organized by section code, so you can jump straight to the engine area you need. Sections include cylinder block, cylinder head, piston and connecting rod, crankshaft and flywheel, lubrication system, fuel system, and cooling system. Each section has an exploded diagram with item numbers keyed to the parts table. The table lists part number, description, quantity per machine, interchange code, and remarks (like engine serial number cutoffs). Page 5 shows a sample table with stud bolts, nuts, and nameplates—columns for different transmission variants (6MA, 6MH, 6MT, etc.).

This is a Parts Catalog, not a service manual. You won’t find torque specs or repair procedures here. What you get is the exact OEM part number for every nut, bolt, gasket, seal, bearing, and assembly that factory engineers designed. If you need a piston for a YM 1900 with a 6MT transmission, you’ll find it listed with the correct diameter (D=80) and length (L=174) defined in the part name column.

Does This Cover the YM2000 and TC2000?

Yes. The front page lists YM 1500 (2TR15), YM 1600 (2TR16), YM 1700 (2TR17), YM 1900 (2TR19), YM 2000 (2TR20), and the TC 2000 (2TR20C). All five core models plus the TC variant. The product code table on pages 6-11 will tell you exactly which parts are shared across models. For example, the NT75 intake/exhaust valve code 101300-11100 shows up in the F6E parts section—meaning you can order the same valve for multiple engine families. That kind of cross-reference saves you from stocking duplicate parts.

Why OEM Documentation Beats Aftermarket Copies

I’ve seen reprints that drop whole columns—no interchange code, no remarks about design-change history. This catalog is a scan of the original Japanese-English edition, first issued February 1973, revised August 1974. Every page is readable, and the numbers match what Yanmar dealers use. The 95 pages include the parts list, product code tables, section code index, and sample table with quantity per vehicle variant. If you’re chasing a part for an old YM, aftermarket lists will give you a generic number that may or may not work. Factory documentation ties the number to the exact model and revision. That’s the difference between a job that fits and a return shipping label.

Related catalogs you might need: Ammann Yanmar B12 B17 Parts Catalog covers smaller YB engines; Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs for later models; and Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM for the larger industrial line. For context on why OEM parts catalogs matter in the Automotive Industry Overview – it’s all about traceability and fitment. Another reference: Automotive Industry Overview

Can I use this catalog to find part numbers for the YM2000 with 6MT transmission?

Yes. The parts table lists quantity columns for each transmission variant (6MA, 6MH, 6MT, 7MA, etc.), so you can pick the correct row for your tractor’s serial prefix.

Does this catalog include torque specifications or repair procedures?

No. This is a parts catalog only. You need the Yanmar service manual for torque values and disassembly steps.

What do the interchange codes A, B, C, D, and E mean?

A = old and new parts are fully interchangeable. B = NOT interchangeable – always confirm engine serial number. C = new part supersedes with interchangeability. D = discontinued. E = newly added. Code B is the one most people miss, and it causes fitment failures.

Will this catalog work for a Yanmar TC2000 (2TR20C)?

Yes. The TC2000 is listed explicitly on the first page with code 2TR20C. All parts in the catalog apply to it unless noted otherwise in the remarks column.

Stop wasting time on generic part sites that give you a fuzzy photo and a maybe number. This is the 1974 factory list, page for page, number for number. Access the Factory Manual and start ordering the right parts today.