Yanmar Saildrive Rubber Bellow Kit – SD20 / SD25 / SD30

Yanmar Saildrive Rubber Bellow Kit for SD20, SD25 & SD30 – Genuine OEM Replacement

Keep your Yanmar Saildrive system fully watertight and protected with this original Yanmar Saildrive Rubber Bellow Kit, designed for SD20, SD25, and SD30 models. This complete OEM kit ensures a secure seal between the Saildrive and hull, preventing water ingress and protecting critical components from corrosion or mechanical damage.

Manufactured to Yanmar’s exact specifications, the rubber diaphragm and sealing components deliver durability, flexibility, and precision fitment. Perfect for professional maintenance or DIY replacement, this kit provides everything required for safe, long-term Saildrive operation.

Compatible Engines:

• Yanmar SD20

• Yanmar SD25

• Yanmar SD30

Key Features:

• Original Yanmar components for long-lasting performance

• Prevents water ingress and safeguards your Saildrive

• Complete kit with diaphragms, O-rings, bands, and protective parts

• Precision-engineered for an exact fit on Yanmar SD20, SD25, and SD30

Recommended Maintenance:
Exposed to seawater and natural wear, Yanmar recommends replacing the rubber bellow every 7 years, regardless of usage, to prevent leaks and ensure safe operation.

Kit Contents:

• 196420-02712 DIAPHRAGM, A

• 196420-02721 DIAPHRAGM, B (Old no. 196420-02720)

• 196420-02730 BAND, ONE TOUCH 199

• 196420-02740 BAND, ONE TOUCH 236

• 24321-000750 O-RING, 1AG75.0

• 24341-000125 O-RING, 1AS12.5

• 196420-02551 PROTECTOR, RUBBER