DynaVim Parts Water Pump Repair Kit for Johnson/Evinrude/OMC 393630 — 20–35 HP OE-fit impeller & gasket set

DynaVim Parts Water Pump Repair Kit 393630 is a complete rebuild set for Johnson, Evinrude and OMC 20–35 HP outboards that replaces impeller, gaskets, seals and wear parts to restore reliable cooling flow.

Designed as a direct-fit replacement for a range of 20–35 HP Johnson/Evinrude/OMC engines, this repair kit supplies the internal components needed to refurbish the lower unit water pump without replacing the entire housing. Each part is manufactured to meet or exceed OE tolerances and is packaged for safe delivery, so technicians, DIYers and marine service shops can complete maintenance with confidence.

Which engines and part numbers does this kit replace?

This kit is compatible with many Johnson, Evinrude and OMC 20–35 HP models that use the original water pump referenced by OE and aftermarket numbers. It directly replaces several legacy references so you can match your existing manual or part label.

• Replaces Johnson/Evinrude numbers: 393509, 391636, 0393630, 393630
• Cross-references: Sierra Marine 18-3382, Mallory 9-48211, GLM 12070
• Fits typical 20–35 HP lower units that use this pump family

What components are included and what does each part do?

The kit bundles the core wear items that govern coolant flow and sealing inside the pump assembly. Replacing these parts restores impeller performance, prevents leaks and helps maintain correct engine temperature under load.

• Flexible impeller — moves water through the cooling passages
• O-rings and gaskets — seal mating surfaces to prevent external leaks
• Wear plates and spacers — align the impeller and reduce cavitation
• Fasteners or small hardware as required for reassembly

How durable and accurate are these replacement parts?

DynaVim Parts produces components to OE standards so fit, form and function closely match the original equipment. The materials and machining are selected to resist saltwater corrosion and wear common in small outboard environments.

• Manufactured to meet or exceed original equipment tolerances
• Materials chosen for marine corrosion resistance and longevity
• Packaged to avoid damage in transit for ready-to-install parts

What after-sale support and warranty should I expect?

The kit includes DynaVim Parts’ buyer-focused support and a hassle-free limited warranty that covers quality-related failures for one year. If a defect appears within that period, customer service will assist to resolve the issue or provide a replacement.

• 1-year warranty on manufacturing defects
• Responsive customer service to help with fit or installation questions
• Careful packaging to reduce transit damage and delivery issues

Who is this for: This water pump repair kit is aimed at marine mechanics, boathouse service technicians, and competent DIY boat owners who maintain Johnson, Evinrude or OMC 20–35 HP outboards and want an economical, accurate way to restore their cooling system without replacing the entire pump housing. Choose this kit when you need OE-equivalent parts, clear cross-references for identification, and one-year support to ensure your rebuilt pump performs dependably on the water.