SD50-4T Yanmar

Yanmar Ref. SD50-4T
Last edited by
BO 2026-10-22 12:22
1 contributor · 2 edits
BO
Sources · 1 cited
[Web] Yanmar SD Operation Manual SD20 / SD50 / SD50-4T (2009) See all →
The Yanmar SD50-4T is the SD50 saildrive variant for the turbocharged 4JH4-TCE engine, with a cone clutch, 2.32:1 reduction ahead and astern and oil-bath lubrication (2.2 L standard; 2.35 L with 58 mm extension, 2.45 L with 100 mm extension). Propeller rotation counterclockwise or clockwise viewed from stern. Dry weight 41 kg. Uses QuickSilver High Performance Gear Oil. Cone clutch: inspect/replace or lap every 500 hours and replace every 2000 hours (dealer). Rubber diaphragm hull seal with seal sensor. Superseded by the SD60-4.

Characteristics

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Waterproof Seal
Yes
Gear Ratio
2.32
Rating
Light Duty / High Output / Pleasure Duty
Forward Direction
Reversible
Weight
41KG
Torque Capacity
— Nm
Cooling System
—
Material
Aluminium
Dimensions
—
Certifications
—

Maintenance schedule

8 tasks · 6 intervals
Task After 50h Every 1yr Every 5yr Every 100h Every 250h Every 2000h
Change Change Gearbox Oil
Inspect Check cable connections
Inspect Inspect engine mounts visually
Inspect Check for corrosion
Inspect Inspect there is no clogging, that filters are clean
Inspect Inspect Sail Drive Bellows
Test Test Alarm
Inspect Inspect the anodes and change them of necessary