Sherwood Major Repair Kit – Fits Sherwood Pumps G155, G151, GC1, GC5, G157 (Replaces SHE23981)
Sherwood Major Repair Kit – Fits Sherwood Pumps G155, G151, GC1, GC5, G157 (Replaces SHE23981) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Sherwood Major Repair Kit – Fits Sherwood Pumps G155, G151, GC1, GC...
Product Details
This Sherwood Major Repair Kit – Fits Sherwood Pumps G155, G151, GC1, GC5, G157 contains all the necessary components to service Sherwood sea water pumps used in various marine engines, including models from Volvo, Mercruiser, and OMC. It ensures you have all the core parts for a full pump overhaul.
This kit is a direct replacement for Sherwood part number SHE23981.
- Installation: Designed for marine engine sea water pumps.
- Compatibility: Fits Sherwood pump models SHEG155, SHEG151, SHEGC1, SHEGC5, and SHEG157.
- Complete Kit: Includes key gaskets and repair components for a comprehensive service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sherwood | SHE23981 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit services pumps used on various Volvo, Mercruiser, and Yamaha engines. The table below lists known gasket applications associated with this kit's components.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo | 4 & 6 Cylinder | 27-33956, 3853342 | Water Pump Gasket |
| Mercruiser | 4 & 6 Cylinder | 27-33956, 3853342 | Water Pump Gasket |
| OMC | 4 & 6 Cylinder | 27-33956, 3853342 | Water Pump Gasket |
| Volvo | Various Models | 46-879194401, 8M0094406, 8M6005225 | Water Circulating Pump - No Bypass hole |
| Mercruiser | Various Models | 46-879194401, 8M0094406, 8M6005225 | Water Circulating Pump - No Bypass hole |
| Volvo | GM Engines | 3852477, 835210, 835211, 27-34897 | Water Pump Mounting Gasket |
| Mercruiser | GM Engines | 3852477, 835210, 835211, 27-34897 | Water Pump Mounting Gasket |
| Yamaha | GM Engines | YSG-37545-87-G0, YSG3754587G0 | Water Pump Mounting Gasket |
Technical Specs
- Product Type
- Water Pump Major Repair Kit
- Installation
- Marine Engine Sea Water Pump
- Compatible Pumps
- Compatible with Sherwood water pumps: SHEG155, SHEG151, SHEGC1, SHEGC5, SHEG157
- Dimensions
- Height: 22.5; Width: 24.5; Length: 28.0;
What’s in the Box
- Water Pump Repair Components (Replaces SHE23981)
- Water Pump Gasket (Replaces 27-33956, 3853342)
- Water Pump Mounting Gasket (Replaces 3852477, 835210, 835211, 27-34897, YSG-37545-87-G0, YSG3754587G0)
Installation Notes
- Preparation: Disconnect the battery and close the engine's water inlet seacock. Drain the cooling system.
- Access Pump: Loosen and remove any belts connected to the water pump pulley. Label and disconnect all hoses from the pump.
- Remove Old Pump: Unbolt the pump from the engine block. Be prepared for some residual coolant to leak out.
- Disassemble Pump: Take the pump to a workbench. Remove the cover plate and impeller. Note the orientation of old seals, bearings, and gaskets.
- Clean & Inspect: Thoroughly clean all housing surfaces, removing old gasket material and corrosion. Inspect the housing for cracks or excessive wear.
- Install New Components: Using the new parts from the kit, carefully install the new seals, bearings, and gaskets. Lubricate seals and the impeller with a suitable marine grease or soap.
- Reassemble & Reinstall: Reassemble the pump and install it back onto the engine, using the new mounting gasket. Torque bolts to manufacturer specifications.
- Final Steps: Reconnect hoses and belts. Open the seacock, refill the cooling system, and reconnect the battery. Start the engine and check for leaks and proper water flow.
Troubleshooting & FAQ
How do I confirm this kit fits my specific pump?
This major repair kit is designed for Sherwood pump models G155, G151, GC1, GC5, and G157. The surest way to confirm fitment is to identify the model number stamped on your existing pump housing and match it to this list.
What are the signs my sea water pump needs a major repair?
Common signs include water leaking from the pump's weep holes (indicating a seal failure), a noticeable drop in cooling water flow from the exhaust, engine overheating at idle or low speeds, or a rumbling/grinding noise from the pump (indicating bearing failure).
Is this kit the same as the original Sherwood SHE23981?
This is an aftermarket kit designed to be a direct replacement for the Sherwood SHE23981 major repair kit. It contains all the equivalent components needed for a full service, built to meet or exceed original specifications.
How often should a sea water pump be serviced?
While the impeller should be inspected yearly and replaced every 1-2 years (or every 200 hours), a full rebuild with a major kit is typically done every 500-1000 operating hours or when signs of seal or bearing wear appear.
The kit includes multiple gaskets. How do I know which one to use?
This kit is designed to cover multiple pump and engine applications. Match the old gasket from your pump to the new ones provided in the kit to find the correct fit for your specific installation. Do not stack gaskets.
Can I just replace the impeller instead of using this whole kit?
Yes, impeller-only kits are available for routine maintenance. However, this major repair kit is intended for a full overhaul to address issues beyond just a worn impeller, such as leaking seals or worn bearings, which an impeller change alone will not fix.
What’s the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It has been manufactured in an ISO 9002 facility and is batch-inspected to ensure it meets or exceeds OEM-level specifications for fit, form, and function using comparable materials.
How fast do you ship and what does it cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free. If expedited options are available for your location, they will be presented at checkout.
What is your warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears on a compatibility list—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is strongly recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with parts arriving in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without ever compromising on materials or quality control.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
