Water Pump Repair Kit with Housing – Fits OMC Stringer Drives 120-260HP (Replaces 983218, 981802)

Water Pump Repair Kit with Housing – Fits OMC Stringer Drives 120-260HP (Replaces 983218, 981802)

This water pump repair kit is designed for OMC Stringer Drives (120-260 HP, 4-Stroke) manufactured between 1962 and 1985. It fits 400 and 800 series sterndrive units equipped with 4-cylinder, V6, and V8 engines.

This assembly is a direct replacement for OMC part numbers 983218, 0983218, 981802, and 778061. It also interchanges with Sierra 18-3386, GLM 12190, Mallory 9-45286, and other aftermarket equivalents.

• Installation Type: Direct replacement for OMC Stringer sterndrive units.
• Included Components: Includes the water pump housing, impeller, wear plate, driveshaft seal, and key way.
• Quality Standard: Manufactured in ISO9002 certified facilities to meet or exceed OEM specifications.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

IMPORTANT: This kit does NOT fit OMC Cobra stern drives.

Technical Specifications

Package Contents

• 1 x Water Pump Housing (981802)
• 1 x Impeller
• 1 x Driveshaft Seal
• 1 x SS Wear Plate
• 1 x Impeller Key Way

Installation Guide

1. Disconnect the battery cables at the battery for safety.
2. Unbolt and carefully remove the sterndrive's lower unit from the upper gear housing.
3. Locate and remove the bolts securing the old water pump housing. Lift the housing off the driveshaft.
4. Remove the old impeller, wear plate, seals, and gaskets. Thoroughly clean the mounting surfaces of any debris or old gasket material.
5. Install the new driveshaft seal and wear plate.
6. Slide the new impeller key into the driveshaft and install the new impeller. A light coat of marine grease or soapy water can ease installation.
7. Place the new water pump housing over the impeller and fasten it securely with the bolts.
8. Re-install the lower unit onto the upper gear housing, ensuring the driveshaft aligns correctly.
9. Reconnect the battery and start the engine. Check for proper water flow from the tell-tale port to confirm the cooling system is functioning correctly.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?
A: This kit is specifically for OMC Stringer drives (400 & 800 series) from 1962-1985. It is not compatible with OMC Cobra drives. Please cross-reference your engine model and year with the 'Compatible Engine Models' table and verify your original part number against our 'Part Number Cross-Reference' list.

Q: My engine is overheating. Could the water pump be the cause?
A: Yes, engine overheating at idle or low speeds is a common symptom of a failing water pump impeller. Other signs include reduced water flow from the exhaust or tell-tale port. Regular inspection is recommended.

Q: How often should I replace my water pump components?
A: For preventative maintenance, it is recommended to inspect the impeller annually and replace the entire water pump kit every 1-2 years, or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).

Q: Does this kit include everything I need for the installation?
A: This kit includes the primary components: the housing, impeller, wear plate, key, and seal. Depending on your engine's condition, you may need additional gaskets or O-rings which are not included. Always check your service manual for a complete list of required parts.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.