Universal M3-20A Marine
Universal Universal M3-20A · M3 family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.
🚜 Base engine likely
The Universal M3-20A shares the Kubota D-640 block of the M3-20 (719cc 3-cyl). source
18 hp13.2 kW
719 ccdisplacement
67×68 mmbore × stroke
3-cylcylinders
NAaspiration
Cheaper-part coverage · 4/8
🚜 Base engine ✓🌀 Impeller ✓💧 Raw-water pump🛢️ Oil filter ✓⛽ Fuel filter ✓🌡️ Thermostat➰ Belt⚓ Anode
A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.
Parts by section · 22 assemblies
The exploded parts diagrams for the Universal M3-20A, grouped by system. Open a figure for its callout part numbers and per-variant quantities.
Body
Fig 1 — Oil PAN GROUPFig 4 — MAIN BEARING CASE GROUPFig 9 — IDUNG APPARATUS GROUPFig 12 — NOZZLE HOLDER GROUPFig 13 — SPEED CONTROL PLATE GROUPFig 16 — WATER PUMP GROUPFig 18 — NAME PLATE GROUPFig 21 — THROTTLE BRACKET GROUPFig 22 — SHERWOOD WATER PUMP 1\1 O. 302
Cooling
Crankshaft & Pistons
Electrical
Engine Block & Head
Fuel
Inlet & Exhaust
Transmission & Mounting
Valve Train
📚 Manuals & Sources
Specs
- Advanced Specifications - Old Model Mfr Westerbeke
Operator's Manual— none yet
Service / Workshop Manual— none yet
Parts Catalog / List— none yet
External links — we host none of these documents.
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- Category
- Marine
- Engine family
- M3
- Cylinders
- 3
- Rated output
- 18 hp (13.2 kW)
- Bore × stroke
- 67 × 68 mm
- Displacement
- 719 cc
- Max rpm
- 3600
- Aspiration
- Naturally aspirated