Partman Fuel Pump for Johnson/Evinrude 388685 — Direct-Fit Replacement for 6–15hp Outboards, 1981–1992

Partman Fuel Pump designed to replace Johnson/Evinrude 388685 and Sierra 18-7350 — a direct-fit replacement for small outboard motors from 1981–1992.

Whether you maintain a vintage runabout or need a reliable spare for seasonal boating, this Partman fuel pump is built to match the fit and function of the original equipment for Johnson and Evinrude outboards. It fits models rated 6hp, 8hp, 9.9hp and 15hp and replaces several OEM part numbers, providing a practical solution when the factory pump fails or begins leaking or losing prime. The unit is engineered for compatibility and straightforward installation by people familiar with small outboard maintenance.

Which engines and part numbers does this pump replace?

This pump covers a range of small outboard engines and replaces multiple legacy part numbers to simplify part sourcing. It is specified to fit Sierra 18-7350 and is compatible with Johnson/Evinrude original replacement numbers.

• Fits 6hp, 8hp, 9.9hp and 15hp outboards from model years 1981–1992.
• Replaces Johnson/Evinrude part 388685 and related numbers 397274, 397839, 391638, 395091.
• Also cross-references Mallory 9-35350 and Sierra 18-7350 for easy identification.

How easy is installation and what should I check before buying?

The pump is designed as a direct-fit replacement, so installation requires basic mechanical skill and common hand tools. Before ordering, verify your engine's model and year, confirm the OEM part number on the old pump, and inspect fuel line connections for hose size and clamp condition.

• Check old pump stamp or sticker for numbers listed above.
• Confirm inlet/outlet hose diameter and clamp types for a leak-free fit.
• Have basic tools ready: screwdrivers, pliers, and possibly a small socket set.

What performance and quality features can I expect?

Partman supplies this pump as a high-quality aftermarket component aiming to meet the original specifications for pressure and flow suitable to the listed outboards. Materials and manufacturing standards focus on long life and reliable fuel delivery under typical marine conditions.

• Constructed to match original pump dimensions and mounting points for correct alignment.
• Seals and diaphragms selected for marine fuel resistance to reduce leaks and swelling.
• Backed by seller support: Partman offers after-sales assistance and a 24-hour response policy for inquiries.

What maintenance tips help prolong pump life?

Routine checks and preventive steps extend service intervals and reduce the chance of on-water failures. Keep fuel clean, replace old or brittle hoses, and inspect clamps and mounting hardware periodically.

• Use clean, stabilized fuel and replace fuel filters regularly to limit debris reaching the pump.
• Replace hard or cracked fuel hoses and use corrosion-resistant clamps during installation.
• Periodically inspect for fuel odors, visible leaks, or difficulty priming as early warning signs.

Who is this for: Boat owners, mariners, and mechanics restoring or maintaining older Johnson and Evinrude outboards (6–15hp models) who need a reliable aftermarket replacement for part 388685 / Sierra 18-7350. It suits anyone seeking a direct-fit pump to restore fuel delivery on vintage small outboards, backed by Partman’s customer support and cross-reference compatibility with multiple OEM numbers.