FREE SHIPPING
Free shipping on every order — no minimum purchase required.DESCRIPTION
Water Distribution Block for Mercruiser 120 GM 153 I/L4 (1964-1972) — OEM replacement part Y3 39921 that manages coolant flow through your engine block. This essential component ensures proper water circulation to prevent overheating and corrosion.
Key specifications:
- Fits Mercruiser 120 engines with GM 153 cubic inch inline 4-cylinder
- Compatible with model years 1964–1972
- OEM-equivalent quality and fitment
- Direct replacement for original part
Restore reliable cooling system performance and avoid costly engine damage with this factory-spec water block.
SHIPPING & RETURNS
SHIPPING
- Free Shipping on all orders — no minimum purchase required.
- Orders are dispatched within 24 hours of purchase (business days).
- Estimated delivery: 2–5 business days within the contiguous United States.
- Tracking information emailed as soon as your order ships.
RETURNS
- Exchanges accepted — we want you to be completely satisfied.
- If a part does not fit or is not as described, contact us within 7 days for an exchange.
- Items must be in original, unused condition and in original packaging.
WARRANTY
- 1-Year extended warranty available at additional cost — ask us for details.
FITMENT & COMPATIBILITY
Please verify that this part is compatible with your vehicle's year, make, model, and trim level before ordering. Part numbers and fitment details are listed in the product description. If you have any questions about compatibility, our team is happy to help — contact us by phone or email before purchasing.
Phone: (803) 723-7074
Email: sales@findmypart.shop
Hours: Mon–Fri, 9am–5pm EST
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