Fuel Pump 397839 for Johnson Evinrude 6 8 9.9 15 HP 2 Stroke Pre-1993 Outboard with Gasket 18-7350 — Australia Local Warehouse
Fuel Pump 397839 for Johnson Evinrude 6 8 9.9 15 HP 2 Stroke Pre-1993 Outboard with Gasket 18-7350 — Australia Local Warehouse
Product Overview
Fuel pump assembly for Johnson and Evinrude 6 HP to 15 HP pre-1993 two-stroke outboards, supplied as 1 pump and 1 mounting gasket. It has a metal body measuring 60 mm x 40 mm x 35 mm (2.36 x 1.57 x 1.38 in), weighs 130 g, and sits on the powerhead side of the 2-cylinder cross-flow engines. It replaces Johnson Evinrude 397839, 397274, 395091 and 391638, plus EMP 1399-07350, Sierra 18-7350 and Mallory 9-35350. Held in our Australia local warehouse.
The pump is driven by crankcase pulses, so a worn diaphragm shows up as a fuel delivery fault rather than a mechanical noise. The primer bulb will not stay hard, fuel weeps at the body seam, and the motor leans out at idle with a sneeze that clears the moment the throttle opens.
These motors are often the second or third engine on a property, run on and off through the year with fuel sitting in them between trips. Ethanol blend left standing is the common cause of a diaphragm that has gone stiff before its hours justify it.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Fuel pump assembly |
| Engine | Johnson and Evinrude outboard |
| Stroke | 2-stroke, cross-flow |
| Horsepower Range | 6 HP to 15 HP (6HP, 7.5HP, 8HP, 9.9HP, 15HP) |
| Years | Pre-1993 (1992 and older) |
| Size (L x W x H) | 60 mm x 40 mm x 35 mm (2.36 x 1.57 x 1.38 in) |
| Material | Metal body |
| Cylinders | 2 cylinder |
| Quantity | 1 pump and 1 mounting gasket |
| Shipping Weight | 130 g |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Johnson Evinrude | 397839, 397274, 395091, 391638 |
| Johnson Evinrude | 395090, 382875, 0382875, 0386834 |
| Johnson Evinrude | 0394789, 0395090, 0388685, 388685, 3911667 |
| EMP | 1399-07350 |
| Sierra | 18-7350 |
| Mallory | 9-35350 |
| Other reference | 600-159 |
Compatible Engines
| Horsepower | Years | Models |
|---|---|---|
| 6 HP | 1977-1979, 1984-1992 | 2 cylinder |
| 7.5 HP | 1980-1983 | 2 cylinder |
| 8 HP | 1980-1992 | 2 cylinder |
| 9.9 HP | 1981-1992 | 2 cylinder 2.188 bore cross flow |
| 15 HP | 1981-1992 | 2 cylinder 2.188 bore cross flow |
| 4.5 HP | 1981-1983 | 2 cylinder |
| 5 HP | 1980-1983 | 2 cylinder |
What's Included
| Component | Qty |
|---|---|
| Fuel pump assembly | 1 |
| Mounting gasket | 1 |
How a Diaphragm Fails
| What You Notice | What It Means | What to Do |
|---|---|---|
| Primer bulb will not stay hard | Diaphragm leaking back, no fuel held | Renew the pump |
| Fuel weeping at the body seam | Diaphragm split at the edge | Stop running it, fuel is reaching the outside |
| Lean sneeze at idle, clean under throttle | Low pump volume at low pulse | Check the pump before the carburettor |
| Motor dies when revs are held | Delivery falls behind demand | Renew the pump and check the pulse hose |
| Fuel in the crankcase, rich running | Diaphragm torn, fuel past the pulse side | Stop and renew, change the gearcase oil if it smells of fuel |
| Pump fine, still no fuel | Blocked filter or collapsing hose liner | Check the line and filter first |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Confirm the motor is 1992 or older, the 1993 and later 6 to 15 HP use a different body |
| 2 | Check the model plate, not only the horsepower |
| 3 | Clamp the fuel line and catch the spill before opening the pump |
| 4 | Note which way the pulse port faces before the old pump comes off |
| 5 | Check the pulse hose and fuel lines for cracks and soft spots |
| 6 | Fit the new gasket dry and tighten the body bolts evenly, do not overtighten |
| 7 | Prime the bulb and check for leaks before starting |
| 8 | Run the motor and check again after it is warm, a seam weep often shows only hot |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from Australia
| Destination | Warehouse | Note |
|---|---|---|
| Australia | Australia local warehouse | Domestic delivery, no import duty |
| New Zealand | Australia local warehouse | Short transit, customs may apply |
| Asia Pacific | Australia local warehouse | Tracked air and sea options |
Before You Buy
- This pump fits 1992 and older engines, the 1993 and later 6 to 15 HP use a different body
- Check the model plate, not only the horsepower
- Inspect the pulse hose and fuel lines for cracks while the pump is off
- Fit the new gasket dry and do not overtighten the body bolts
- Prime the bulb and check for leaks before starting, then check again when warm
- This is the pump and mounting gasket, the pulse hose, filter and carburettor are not included
- 30-Day Easy Returns
- Ships from our Australia local warehouse
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