All 34 pages of this Yanmar 4TNV88-XBV Parts Catalog (OEM #Y00B7080) exist for one purpose: tracking down the exact part you need for your engine, from the cylinder block to the fuel injection pump. Inside, you get exploded-view diagrams paired with itemized parts lists for every major assembly: cylinder block, gear housing, flywheel housing, oil sump, crankshaft and piston, lubrication system, cooling water system, and the complete fuel injection circuit covering pump, valve, and fuel line. Starting motor and generator round out the assembly coverage. Part-number callouts include dimensional data you need to confirm fit before ordering: the P16 O-ring and M8×85 bolt specs on the injection pump assemblies are the kind of factory cross-references that save a second trip to the parts counter. Your machine is down. Bookmarked and keyword-searchable, this PDF puts the right part number on your screen the first time.
What's Inside This Yanmar 4TNV88-XBV Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine Section 4TNV88-Xbv | 1 | Cylinder Block, Gear Housing, Flywheel Housing & Oil Sump, Cylinder Head & Bonnet, Suction Manifold, Exhaust Manifold, Camshaft & Driving Gear, Crankshaft & Piston |
| Gasket Set & Tools | 32-34 | Gasket, Cyl. Head, O-Ring, F.I.PUMP, Seal, Valve Stem, EXH.MANIFOLD |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Metal Undersize | 0.25 | p. 2 |
| Thrust Metal Undersize | 0.25 | p. 2 |
| Pipe, Knock Length | 18 | p. 4 |
| O-Ring Size | P16 | p. 4 |
| Bolt Size | M8X85 | p. 4 |
| Drain Plug Size | M22 | p. 6 |
| Cotter Size | 8 | p. 8 |
| Nut Size | M8XP1.0 | p. 8 |
| Piston W/Ring Oversize | 0.25 | p. 16 |
| Ring Set Oversize | 0.25 | p. 16 |
| L.O. Switch Setting | 0.5KG | p. 18 |
Yanmar 4TNV88-XBV Common Problems This Manual Covers
Yanmar 4TNV88-XBV injector part number unclear, replaced injectors but engine still runs on 3 cylinders
Check the engine parts diagram to identify the correct injector assembly position in the cylinder head. Pull the matching part number from the parts number list on page 2. When ordering, also note that an O-ring of size P16 is listed on page 4 as a separate line item for this engine.
Manual Section: Engine Section 4TNV88-XbvCylinder head gasket kit parts list incomplete when rebuilding top end after head removal p. 32
Open the Gasket Set & Tools section at page 32. Parts are catalogued individually: Gasket, Cyl. Head; Seal, Valve Stem; and Gasket, EXH.MANIFOLD. If the rebuild extends to the bottom end, the main bearing undersize is 0.25mm (page 2). Cross-check all part numbers before ordering to avoid missing components.
Manual Section: Gasket Set & ToolsValve stem seal part number missing when intake manifold shows unburnt fuel and oil residue p. 32
Locate valve stem seals in the Gasket Set & Tools section at page 32, listed as Seal, Valve Stem. Verify the exact part number on page 2. Order the full gasket set to also cover the head gasket and exhaust manifold gasket. The O-ring on page 4 is size P16; order it if fuel lines are disturbed.
Manual Section: Gasket Set & ToolsPiston and ring set part numbers needed for 0.25mm oversize bore after cylinder rebore p. 16
Find both Piston W/Ring Oversize and Ring Set Oversize entries on page 16; both are available in 0.25mm oversize. Order them as a matched set to ensure correct ring-to-groove fit. Confirm the final part numbers on page 2 and verify your engine serial number falls within the listed production range.
Manual Section: Engine Section 4TNV88-XbvOil pressure switch part number unclear, low oil warning light comes on at engine startup p. 18
Find the oil pressure switch in the engine parts diagram. The L.O. Switch for this engine is rated at 0.5KG (page 18); confirm the replacement part matches this pressure setting exactly. Pull the correct part number from the parts number list on page 2 before contacting your Yanmar dealer.
Manual Section: Engine Section 4TNV88-XbvFrequently Asked Questions
How do you fix yanmar 4TNV88-XBV injector part number unclear, replaced injectors but engine still runs on 3 cylinders?
Check the engine parts diagram to identify the correct injector assembly position in the cylinder head. Pull the matching part number from the parts number list on page 2. When ordering, also note that an O-ring of size P16 is listed on page 4 as a separate line item for this engine.
How do you fix cylinder head gasket kit parts list incomplete when rebuilding top end after head removal?
Open the Gasket Set & Tools section at page 32. Parts are catalogued individually: Gasket, Cyl. Head; Seal, Valve Stem; and Gasket, EXH.MANIFOLD. If the rebuild extends to the bottom end, the main bearing undersize is 0.25mm (page 2). Cross-check all part numbers before ordering to avoid missing components.
How do you fix valve stem seal part number missing when intake manifold shows unburnt fuel and oil residue?
Locate valve stem seals in the Gasket Set & Tools section at page 32, listed as Seal, Valve Stem. Verify the exact part number on page 2. Order the full gasket set to also cover the head gasket and exhaust manifold gasket. The O-ring on page 4 is size P16; order it if fuel lines are disturbed.
How do you fix piston and ring set part numbers needed for 0.25mm oversize bore after cylinder rebore?
Find both Piston W/Ring Oversize and Ring Set Oversize entries on page 16; both are available in 0.25mm oversize. Order them as a matched set to ensure correct ring-to-groove fit. Confirm the final part numbers on page 2 and verify your engine serial number falls within the listed production range.
How quickly can I access this manual after buying?
Instant PDF download. You get the full 34-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print specific sections of this Yanmar 4TNV88-XBV Parts Catalog?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Document Quality
This document is a high-quality scanned PDF with an accurate OCR layer, allowing you to search and copy the full text. The text throughout is crisp and very easy to read. All diagrams and illustrations are clear vector graphics, ensuring labels and details remain sharp at any zoom level. Pages are clean, free from scan artifacts, stains, or skewed content. There are no blank or filler pages present.
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