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SKU:
SZ1C08563
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Fuel Pump 397839 for 1968-1992 Johnson Evinrude 6-15HP Outboards
$25.99
In Stock
$25.99
Sale price
$25.99
Regular price
This aftermarket diaphragm fuel pump replaces Johnson and Evinrude 397839 on compatible older 6HP, 8HP, 9.9HP, 10HP, and 15HP two-stroke outboards through the 1992 model year.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 1968-1992 Johnson 6HP applications using 397839
- 1968-1992 Evinrude 6HP applications using 397839
- Johnson and Evinrude 8HP applications through 1992 using 397839
- Johnson and Evinrude 9.9HP applications through 1992 using 397839
- Johnson and Evinrude 10HP applications through 1992 using 397839
- Johnson and Evinrude 15HP applications through 1992 using 397839
- Most commonly referenced for 1987-1992 two-cylinder models; verify engine model
Product Overview
An older outboard that keeps running only while the primer bulb is squeezed, stalls as throttle is added, or will not refill the carburetor may have a weak pulse-operated fuel pump. When the tank, bulb, hose, vent, connectors, carburetor, and crankcase pulse are sound, this pump can restore normal fuel delivery.
The original listing's '1992-up' wording is not reliable. 397839 is associated with older applications through 1992, so use the engine model number and the removed pump as the final fitment check.
Key Features & Performance
- Pulse-operated diaphragm pump for selected older two-stroke outboards
- Covers several Johnson and Evinrude small-horsepower families
- Replaces 397839 and earlier superseded references
- Useful when manual primer pressure temporarily keeps the engine running
- Aftermarket marine fuel-system repair part
Replaces Part Numbers
- 397839
- 391638
- 395091
- 397274
- 388681
- 386978
- 18-7350
- 18-7823
Common Uses
- Repairing an outboard that runs only while the primer bulb is squeezed
- Correcting fuel starvation after the tank and hose test good
- Replacing a leaking or hardened diaphragm pump
- Restoring dependable fuel transfer on an older fishing motor
Technical Specifications
- Product Type: Diaphragm fuel pump
- Fuel System: Pulse-operated carbureted two-stroke
- Horsepower Range: Selected 6-15HP applications
- Year Range: Older models through 1992 when 397839 is specified
- Replacement Type: Aftermarket
Installation & Fitment
- Read the full outboard model number from the clamp bracket or ID tag
- Match 397839 and compare ports, mounting holes, pulse path, and body shape
- Inspect tank vent, primer bulb, quick connectors, hose, filter, and carburetor
- Use marine-rated fuel hose and clamps and keep fuel away from ignition sources
- Prime and inspect every connection for leaks before running on the water
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model names and year ranges are a starting point. Match the original reference number, configuration, connections, mounting points, and product-specific details before ordering.
Frequently Asked Questions
Q: Is this for 1992 and newer outboards? A: No. Research supports older applications through 1992, not 1992-up.
Q: Why does squeezing the primer bulb keep the motor running? A: That can indicate the engine-driven pump is not maintaining flow, though air leaks and restrictions can do the same.
Q: Can I order by horsepower alone? A: No. Match the full engine model number and original pump reference.
Part Summary
keywords: Johnson Evinrude 397839 fuel pump, 1987 9.9HP outboard pump, 1992 15HP Evinrude fuel repair, older Johnson 6HP diaphragm pump, outboard runs only with primer bulb, Sierra 18-7350 replacement, two stroke marine fuel pump, aftermarket OMC small outboard pump
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.