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| | '''General'''<br> |
| Manufacturer: Yanmar<br> | | Manufacturer: Yanmar<br> |
| Description: Saildrive Unit<br> | | Description: Saildrive Unit<br> |
| Model: SD20<br> | | Model/Part Number: SD20<br> |
| Manual: [[File:SD20 Operations Manual 2009.pdf|thumb|Link]] <br> | | '''Documents'''<br> |
| Parts catalog: [[File:SD20 Part Catalog.pdf|thumb|Link]] <br> | | *Manual:'' [[File:SD20 Operations Manual 2009.pdf|thumb|Link]] <br> |
| O-Ring parts diagram: [[File:SD20 O-rings Parts Diagram .pdf|thumb|Link]] <br> | | *Parts catalog:'' [[File:SD20 Part Catalog.pdf|thumb|Link]] <br> |
| Service Bulletin - Taper pin: [[File:SD20 Taper Pin Bulletin.pdf|thumb|Link]] <br><br> | | *O-Ring parts diagram:'' [[File:SD20 O-rings Parts Diagram .pdf|thumb|Link]] <br> |
| '''Part Numbers'''<br>
| | *Service Bulletin - Taper pin:'' [[File:SD20 Taper Pin Bulletin.pdf|thumb|Link]] <br> |
| Saildrive seal replacement kit<br>
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| 196313-02591 Saildrive seal, oil prop shaft (Qty 2 per saildrive)<br>
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| 24321-000950 Saildrive rear cover O-ring (Qty 2 per saildrive)<br>
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| 24341-000125 O-Ring, drain plug (Qty 1 per saildrive)<br>
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| 196315-02880 Circlip, Needle 52 (optional to reposition seals)<br><br>
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| Others<br>
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| 196420-02551 Rubber protector, saildrive leg<br>
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| 196420-02602 Saildrive, rear cover<br>
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| 196311-04060 Needle Bearing (supports propeller shaft, replace it needles fall out or are loose)<br>
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| 196440-02701 Bolt, Bracket (Split zinc bracket, flat head M6X18)<br>
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| 26453-100252 Bolt, M10X25 (Saildrive rear cover bolt)<br>
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| 196420-02530 Drain, M10 (Saildrive oil plug)<br><br>
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| '''Notes:'''<br>
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| ''Blown seals:'' The SD20 is susceptible to blowing the seals if the oil is filled too high. Many have added a vent line to the top of the filler cap. Without the vent, only fill the saildrive oil to the bottom of the dipstick<br>
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| ''Sheared tapper pin repair:'' [https://www.strikhedonia.com/anchoring-with-no-starboard-engine-in-a-crowded-anchorage/ External Link]<br>
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| ''Oil specifications:'' 80W90W gear oil (API GL-4 or GL-5)<br>
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| ''Oil capacity:'' 700ml<br>
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| ''Oil change interval:'' Every 250 hours of operation or annually (whichever comes first)<br>
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| ''Procedure to change oil in the water:''<br>
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| # Using a pump with a small tube remove as much oil as possible<br>
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| # Refill oil to full capacity (bottom of dipstick)
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| # Run engine 5 minutes<br>
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| # Using a pump with a small tube remove as much oil as possible<br>
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| # Refill oil to full capacity (bottom of dipstick)<br>
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| :(This will replace over 75% of the oil)<br><br>
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| Outer diaphragm and secondary inner diaphragm<br>
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| ''Replacement Guidelines:'' Inspect every 2 year and replace every 5 years<br>
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| ''Common Practice:'' Monitor condition and test the water penetration sensor<br>
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| ''Recommendations:'' Pacwest in San Diego does not recommend changing the diaphragms unless there is visible damage or water has penetrated the outer diaphragm. These diaphragm almost never fail. I have read this from other sources who make the same recommendation.
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| Propeller Shaft Grooves<br>
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| It is an issue that they Gori propellers installed on a SD20 saildrive will form grooves over time which will result in sea water penetration. Periodic repositioning of the seals using shims allow longer life from the propeller shafts.<br>
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| [[File:Propeller Shaft Seal Grooves.jpg|thumb|Grooves worn into the propeller shafts]]<br>
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General
Manufacturer: Yanmar
Description: Saildrive Unit
Model/Part Number: SD20
Documents
