This SEI Marine External Line Trim Cylinder is a direct replacement for Mercruiser Alpha 1 sterndrives (1972–1991).
Designed to fit either port or starboard, it replaces OEM part numbers 32-87234, 32-87235, and 87173A5.
This trim cylinder features two hydraulic hose connections — one located at the front and one at the rear of the cylinder.
Constructed for smooth hydraulic actuation and corrosion resistance, this SEI replacement provides reliable trim and tilt operation for older Mercruiser systems.
Note: Not compatible with models using single-hose or dual front-hose cylinders.
Product Features
- Manufacturer: SEI Marine
- Application: Mercruiser Alpha 1 sterndrives (1972–1991)
- Fitment: Port or Starboard
- OEM Part Numbers: 32-87234, 32-87235, 87173A5
- Configuration: Two hydraulic hose connections — front and rear
- Compatibility: Fits 70–82 R-style drives and Alpha I models
- Design: External line configuration
- Condition: Brand-new SEI Marine replacement component
- Warranty: 3-Year Fault-Free Warranty
Additional Information
If your existing trim cylinder has only one hose, or both hoses connected at the front, this model will not fit without purchasing the proper rear hose connection.
Each drive requires one port-side and one starboard-side cylinder.
For best results, replace in matched pairs.
Shipping Information
SHIPPING: Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal money request for the additional shipping charges at the email address provided.
(Some items are excluded from international shipping.)
Customer Support
For compatibility confirmation or questions, please email customerservice@marinepartswarehouse.com .
Include your engine model number and drive serial number to ensure proper fitment.
