Description

Yanmar 4TNV94L-NHZ Parts Catalog – 22 Pages of Factory Part Numbers

If you’ve ever ordered a part based on a generic cross-reference and ended up with something that doesn’t fit, you know the waste. This Yanmar 4TNV94L-NHZ Parts Catalog is the OEM document – 22 pages of exploded diagrams and part numbers straight from the factory. No guessing which bolt goes where. No aftermarket reprints with missing lines. Just the raw data you need to order the correct component the first time.

Engine Section Breakdown: Cylinder Block to Gasket Set

The catalog opens with the CYLINDER BLOCK section, then moves through GEAR HOUSING, FLYWHEEL HOUSING & OIL SUMP, and CYLINDER HEAD & BONNET. Each part is identified by a parts number, reference number, and level indicator (1 = parent assembly, 2 = child part, 3 = sub-component). For example, the camshaft (Camshaft & Driving Gear section) is listed with its roller bearing and retainer. The CRANKSHAFT & PISTON section gives you every rod, bearing, and ring. Cooling system parts are in COOLING WATER SYSTEM. Fuel system? Sections 10 (Fuel Injection Pump), 12 (Fuel Injection Valve), and 13 (Fuel Line) cover injectors, lines, and the governor. The FUEL INJECTION PUMP is even broken down by boost compensator type. Gasket set is section 16. Without this catalog, you’re gambling on fitment.

Interchangeability Marks: What N, Q, R Mean

One feature that separates an OEM catalog from a generic parts list is the interchangeability column. You’ll see marks like N, Q, R, S, W, Z, F, and K next to each part. N means new part fits old, but old does not fit new. R means fully interchangeable both ways. S means zero interchange. This is critical when a design change has happened – you won’t order a part that requires retrofitting other components. The catalog explains all marks on the first few pages. Ignoring these marks leads to returns and downtime.

Does This Catalog Cover the Fuel System Components?

Yes – and it goes deeper than you might expect. The FUEL INJECTION PUMP section includes the pump assembly (part 729595-51390 and variant 729595-51391) along with mounting screws M6x16 and the camshaft inside the pump. The GOVERNOR section follows, then FUEL INJECTION VALVE with nozzle and holder parts. FUEL LINE section lists all pipes and clamps. If you’re rebuilding a 4TNV94L-NHZ fuel system, you need these OEM part numbers because aftermarket injector cross-references are hit-or-miss. The catalog also notes optional boost compensator types and engine serial number ranges for compatibility.

7 Systems Mapped in 22 Pages

22 pages may not sound like a thick manual, but every page is packed with exploded diagrams and part tables. The document covers: (1) Engine block and rotating assembly, (2) Cylinder head and valve train, (3) Lubrication system, (4) Cooling water system, (5) Fuel injection and governor, (6) Starting motor and generator, (7) Complete gasket set. Each system has its own section with a clear table linking the illustration reference to the part number. You get the level hierarchy (parent/child) and the interchangeability mark. No wasted space – just what you need to order parts for a Yanmar engine.

Get the Right Part Numbers for Your 4TNV94L-NHZ

Before you pull a part off your engine and try to match it at a parts store, open this catalog. Look up the section, find the reference number, and order the exact Yanmar factory part. The catalog includes both standard parts and optional variants (e.g., fuel injection pump with boost compensator). The first page explains how to read the catalog: levels, change marks (I for recent design change), and interchangeability. It also warns that some parts shown in illustrations may not be sold individually – only as assemblies. That kind of detail saves you from ordering a bolt you can’t get separately. If you need a full service procedure, pair this catalog with the corresponding repair manual – but for parts, this is the final authority.

For related Yanmar parts catalogs, check out the Ammann Yanmar B12 B17 Parts Catalog for smaller engines, or the Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs for older models. If you need an even larger reference, the Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM covers those series. For background on why OEM documentation matters, see this Automotive Industry Overview and the Automotive Industry Overview for context on factory spec standards.

Can I use this catalog to rebuild my engine?

No. This is a parts catalog, not a service manual. You need the repair manual for procedures.

How do I know if a part has been superseded?

The catalog includes interchangeability marks (N, Q, R, S, etc.) in the ‘I’ column. Each mark tells you whether the new part replaces the old one, or if they are not interchangeable. Mark ‘N’ means new part fits old, but old doesn’t fit new. Mark ‘R’ means fully interchangeable. Mark ‘S’ means no interchange at all. This prevents ordering a part that won’t work. Always check the level (1,2,3) to see assembly hierarchy. This is explained on the first pages.

Does the catalog include gasket part numbers?

Yes. Section 16 is the GASKET SET, listing all seals and gaskets for the engine. This is useful when ordering a full overhaul set.

Is this a PDF format?

Yes. You get the 22-page PDF immediately after purchase.

If you’re working on a Yanmar 4TNV94L-NHZ and need factory part numbers, this is the only source you should trust. Access the Factory Manual now and get back to work.