SD25
Current Yanmar small saildrive with a dog clutch and 2.64:1 reduction, matched to the 1GM10, 2YM15, 3YM20 and 3YM30AE; the 2015 successor to the SD20.
The SD25 is a Yanmar-designed saildrive with a mechanical dog clutch, a single 2.64:1 ratio ahead and astern, an SAE #6 bell housing and a dry weight of 30 kg (33.4 kg with the extension leg, per the operation manual). Yanmar builds it to bolt directly to the dedicated marine housings of its small engines, and lists it for the 1GM10, 2YM15, 3YM20 and 3YM30AE.
It was released in 2015 together with the 3YM30AE and replaced the SD20, keeping the SD20's outline and dimensions; it is distinguished by light grey non-metallic paint on the leg and a hard-anodised finish for better corrosion resistance. It remains in Yanmar's current drive line-up.
Sources
- 1. SD25 Saildrive product page — Yanmar Marine International
- 2. SD Series Operation Manual SD25, SD60, SD110, SD150 (0ASDM-M00041, Dec. 2025) — Yanmar
- 3. Yanmar releases new 30hp engine and SD25 saildrive (7 July 2015) — boatsales.com.au
- 4. Drives (Saildrive and Sterndrive overview) — Yanmar Marine International
Specifications compiled from manufacturer sources.