GHmarine water pump impeller kit for OMC Cobra 2.3–7.5L (1986–1993) — complete seal, wear plate & housing

GHmarine 984461 is a complete water pump impeller replacement kit engineered to restore cooling flow on compatible OMC Cobra stern drive engines (1986–1993) except 1990 2.3L and King Cobra 1992+ models.

If your outboard or stern drive shows reduced cooling or overheating symptoms, replacing the impeller and related components is one of the most effective maintenance steps. This kit provides the key parts you need — impeller, wear plate, gasket, seal, impeller liner/cup and housing — sized to fit many OMC Cobra engines from 2.3L through 7.5L. It’s a practical, OEM-style option for routine service, mid-season repairs, or prepping a boat for storage.

Which engines and years does this GHmarine 984461 kit work with?

This kit is designed specifically for OMC Cobra stern drive engines produced between 1986 and 1993, covering 2.3L through 7.5L displacements. It fits most Cobra variants in that range but excludes the 1990 2.3L and King Cobra models from 1992 onward. Cross-replacements include part numbers 984461, 983895 and 984744.

• Compatible: OMC Cobra 2.3L, 2.5L, 3.0L, 4.3L, 4.6L, 5.0L, 5.7L, 5.8L and 7.5L (1986–1993)
• Not compatible: 1990 2.3L and King Cobra 1992-up models
• Includes parts that replace original OEM numbers listed above

What parts are included in the repair kit and why they matter?

The kit contains all primary service items for a water pump overhaul: the rubber impeller, wear plate, gasket, mechanical seal, impeller liner/cup and the housing. Replacing these together ensures the pump seals correctly and delivers intended water flow, reducing the chance of repeat failures shortly after service.

• Impeller (777128) — moves cooling water through the system
• Wear plate (911703) — provides sealing surface for the impeller
• Gasket (911702) and Seal (911704) — prevent leaks at mating surfaces
• Impeller liner/cup (764197) and Housing (984744) — restore proper chamber fit and performance

How difficult is installation and what should I prepare?

Installation is straightforward for anyone comfortable with basic marine maintenance and using hand tools. Typical steps include removing the drive unit, draining cooling passages, disassembling the pump, replacing all kit parts, and reassembling with correct torque and sealant where recommended. If you’re unsure, a marine mechanic can complete the job in a short service visit.

• Tools needed: basic socket set, screwdrivers, pliers and a gasket scraper
• Time: expect 1–3 hours depending on experience and access
• Tip: inspect raw-water pickup and hoses while pump is out

Will this kit prevent future cooling issues?

Using fresh components from this kit restores the pump’s internal clearances and sealing, which often corrects flow loss caused by worn parts. While new parts greatly reduce risk from pump wear, they don’t prevent unrelated issues like clogged strainers, blocked through-hulls or damaged raw-water lines; inspect the whole cooling system for best results.

• Addresses common wear points inside the pump housing
• Improves sealing and impeller engagement to recover flow
• Combine with system inspection to minimize repeat problems

Who is this for: The GHmarine 984461 kit is aimed at boat owners, DIY marine technicians, and professional mechanics who service OMC Cobra stern drives from 1986–1993 (except specified exclusions). It’s ideal for routine maintenance, seasonal prep, or emergency pump repairs when you need a full set of replacement components to restore reliable raw-water cooling.