Water Pump Gasket – Fits Mercury Outboards 30-45 HP (Replaces 27-19553)
Water Pump Gasket – Fits Mercury Outboards 30-45 HP (Replaces 27-19553) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Gasket – Fits Mercury Outboards 30-45 HP (Replaces 27-19...
Product Details
This aftermarket Water Pump Gasket – Fits Mercury Outboards 30-45 HP (Replaces 27-19553) creates a secure seal between the water pump and plate. It is designed for Mercury Marine 30-45 HP 4-Stroke outboard engines from 1995 to the present.
It serves as a direct replacement for several OEM and aftermarket part numbers, including GLM 31060, Sierra 18-2823, and Mercury/Quicksilver 27-19553 / 27-32769.
- Installs between the water pump and its mounting plate.
- Engineered to meet or exceed original equipment specifications.
- Package includes one gasket.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/Quicksilver | 27-19553 |
| Mercury/Quicksilver | 27-32769 |
| GLM | 31060 |
| Sierra | 18-2823 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury Marine owners, this part fits specific 4-stroke models in the 30-45 HP range manufactured from 1995 onwards. Check your serial number against the notes for precise fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 30 JET | 30 | 4-Stroke | 1995 and up | 27-19553 | Fits serial no. 9570790 and up; also 0C159200 thru 0G589999 |
| Mercury | 35 | 35 | 4-Stroke | 1995 and up | 27-19553 | Fits serial no. 9466647 and up; also B110789 and up |
| Mercury | 40 (4 CYL.) | 40 | 4-Stroke | 1995 and up | 27-19553 | Fits serial no. 9570790 and up; also 0C159200 and up |
| Mercury | 40 JET | 40 | 4-Stroke | 1995–2006 | 27-19553 | Fits serial no. 0C159200 thru 0G589999 |
| Mercury | 45 (4 CYL.) | 45 | 4-Stroke | 1995 and up | 27-19553 | Fits serial no. 9466692 and up; also 0A719281 and up, 0B110789 and up |
Technical Specs
- Product Type
- Water Pump Gasket
- Installation
- Between water pump and plate
- Dimensions
- 6.0" H x 7.5" W x 0.13" L
- Weight
- 0.16 oz (4.5 g)
- Other Attributes
- OEM water pump gasket
- Warranty
- Standard manufacturer warranty
What’s in the Box
- 1 x Gasket (27-19553)
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Drain the lower unit gear lube to prevent spills.
- Remove the lower unit from the outboard housing to access the water pump.
- Unbolt and remove the water pump housing and impeller.
- Carefully remove the old water pump gasket and wear plate.
- Thoroughly clean both mating surfaces, ensuring they are free of old gasket material and corrosion.
- Place the new gasket into position on the clean surface.
- Reinstall the water pump components, housing, and bolts, tightening to manufacturer-specified torque values.
- Reattach the lower unit to the engine.
- Refill the gear lube and start the engine, checking for proper water flow and no leaks.
Troubleshooting & FAQ
How do I know if this gasket will fit my specific engine model?
The surest way is to check your engine's serial number against the ranges provided in the Engine & Model Compatibility table. If your model and year match, but the serial number is not in the listed range, this part may not fit.
What are the signs of a failing water pump gasket?
Common symptoms include the engine overheating at low speeds, a reduced or weak water stream from the tell-tale port, or visible water leaks around the water pump housing seam.
Can I reuse my old gasket if it looks okay?
No. Gaskets are single-use components designed to crush and create a seal. Reusing an old gasket will almost certainly lead to leaks and potential engine damage from overheating.
When should this gasket be replaced?
It is best practice to replace the water pump gasket anytime you service the water pump, which typically includes replacing the impeller. This is a critical preventative maintenance item.
Is any sealant required during installation?
Generally, this type of gasket is designed to be installed dry on clean, flat surfaces. Applying sealant can sometimes interfere with a proper seal unless specified by your engine's service manual.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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