Anchoring / Mooring
| Pos. | Part No. | Description | Quant. per Boat | Beginning Hull # | Ending Hull # | Price + Shipping |
| 1 | 127883 | ANCHOR LOCKER HATCH OC6 | 1,000 | — | — | |
| 2 | 039287 | LATCH FLUSH-PULL WHITE | 1,000 | — | — | $27.50 |
| 3 | 57032 | SS BOLT LATCH S 15MM | 1,000 | — | — | |
| 4 | 76374 | SAIL ELASTIC L300+2BALLS NM | 1,000 | — | — | |
| 5 | 273950 | SCUPPER CHAIN LOCKER WHITE UV FILTER | 2,000 | — | 166 | 2.00 |
| 5 | 954712 | STAINLESS STEEL DEFLECTOR | 2,000 | 167 | — | 5.01 |
| 6 | 694500 | PADEYE SS PN 2 | 1,000 | — | — | |
| 7 | 122994 | Cleat CLASS AL L400 STDG N2 | 6,000 | — | — | |
| 8 | 986573 | RUBBING STRIP S/S L 650 | 6,000 | — | — | 26.75 |
| 9 | 131626 | S/S STEMHEAD EXTENSION SO361 | 1,000 | — | — | |
| 10 | 905472 | S/S HINGE 60X50 STDG | 2,000 | — | — |
Equipment Hull, Deck
Steering System
Beneteau Oceanis 41 Q & A
Question:
Our SailDrive is gone on our 2013 Beneteau Oceanis 41 . It was a SD50 serial number 0305-12. To replace it I need to know :
- Is it a long or standard length shaft?
- What is the gear ratio?
I want to replace it with an SD60.
Answer:
To order the correct Yanmar SD60 replacement for your 2013 Beneteau Oceanis 41:
1. Shaft / Leg Length
- Standard Length: Beneteau uses the standard-length leg for the Oceanis 41 hull design. Long-shaft saildrives are typically reserved for deep catamarans or custom applications requiring extra depth.
2. Gear Ratio
While the original Yanmar SD50 saildrive mated to the 3JH5E or 4JH5E engine series (common on boats like the Beneteau Oceanis 41) does run a 2.32:1 reduction ratio, its newer SD60 replacement does not retain this exact ratio. [1]
When replacing or upgrading the transmission system, note the differences in their respective ratios and specifications:
Reduction Ratio Comparison
| Saildrive Model | Reduction Ratio (Forward/Reverse) | Clutch Type |
|---|---|---|
| Yanmar SD50 | 2.32:1 | Mechanical cone clutch |
| Yanmar SD60 | 2.23:1 (or 2.49:1 depending on configuration) | Mechanical wet multi-disc clutch |
Key Impacts for an Oceanis 41 Retrofit
- Propeller Pitch Adjustment: Because the SD60 has a slightly taller 2.23:1 gear ratio, the propeller turns faster relative to engine RPM than it did on the SD50. When swapping the saildrive on your Oceanis 41, you may consider re-pitching your existing propeller or adjusting its diameter to avoid overloading the engine at maximum RPM.
- Adjusting or re-pitching your propeller is not automatically required when replacing a saildrive. Whether it is needed depends entirely on what changed during the swap:
- When You DO NOT Need to Adjust the Propeller
- Correct WOT RPM: If your engine previously reached its rated Wide Open Throttle (WOT) RPM under full load (typically ~3,000–3,200 RPM for common Yanmar engines like the 3JH5E or 4JH45 found on the Oceanis 41) without blowing black smoke or overheating, no changes are necessary.
- When You DO Need to Adjust or Re-Pitch
- Different Gear Ratio: If the new saildrive model has a different reduction ratio (e.g., changing from a 2.15:1 ratio to a 2.38:1 or 2.62:1 ratio), the propeller shaft will spin at a different speed for the same engine RPM.
- A lower gear reduction (faster prop shaft speed) forces the prop to move more water per engine revolution, overloading the engine and preventing it from reaching max RPM.
- A higher gear reduction (slower prop shaft speed) underloads the engine, letting it hit its rev limiter without producing full push/speed.
- Engine Change: If you are upgrading or replacing the engine alongside the saildrive to a model with a different horsepower rating or maximum RPM range.
- Pre-existing Engine Overload: If your boat was already over-propped before the swap (unable to reach manufacturer-specified max RPM at full throttle), the swap is the ideal time to correct the pitch or diameter.
- Physical Alterations: The SD60 is a drop-in replacement footprint-wise, but it features a completely updated, more robust multi-disc clutch system to solve the slipping issues possible on the SD50’s cone clutch. It typically requires a Yanmar spacer/adapter plate and slightly longer mounting bolts because it sits slightly higher in the engine bed.
Important Upgrade Notes for the SD50 to SD60 Swap
When ordering your replacement SD60 drive:
- Adapter Plate / Mount Kit: The SD60 has a slightly different mounting footprint and rear-mount distance than the SD50. You will need the Yanmar SD50-to-SD60 Engine Conversion Kit, which includes an adapter plate that adjusts engine height by ~12 mm to align correctly with the hull bed.
- Shift Cable: The SD60 uses a mechanical hydraulic multi-disc clutch rather than the cone clutch of the SD50, requiring a slight adjustment to shift cable stroke or bracket positioning.