Water Pump Impeller 0389642 389642 777212 18-3043 for Johnson Evinrude 85 115 150 175 200 235 HP Outboard
Water Pump Impeller 0389642 389642 777212 18-3043 for Johnson Evinrude 85 115 150 175 200 235 HP Outboard
Product Overview
Water pump impeller for Johnson and Evinrude V4 and V6 outboards from 85 HP to 235 HP, a 6 blade impeller 89.66 mm outside diameter, 22.32 mm hub and 32 mm high. It replaces OMC 0389642, 389642, 777212 and 385528 and crosses to Sierra 18-3043.
This is the large cross flow impeller on the 1970s and 1980s V4 and V6 motors, the one that sits in a round stainless liner under the plate. Once the liner is grooved, a new impeller will not restore flow, so check the liner before ordering.
The fitment covers 85, 115, 135, 140, 150, 175, 200 and 235 HP motors built between 1973 and 1988. Many of these are still working as workboats and dive boats, where the impeller is changed on a season rather than on hours.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Outboard water pump impeller |
| Blades | 6 |
| Outside Diameter | 89.66 mm |
| Hub Diameter | 22.32 mm |
| Height | 32 mm |
| Net Weight | 149 g |
| Net Weight with Packaging | 199 g |
| Pack Size | 9 x 10 x 15 cm |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Johnson / Evinrude OMC | 0389642, 389642 |
| Johnson / Evinrude OMC | 0777212, 777212 |
| Johnson / Evinrude OMC | 0385528, 385528 |
| Sierra | 18-3043 |
Compatible Engines
| Horsepower | Years |
|---|---|
| 85 HP | 1973 to 1978 |
| 115 HP | 1973 to 1975, 1977 to 1978 |
| 135 HP | 1973 to 1974 |
| 140 HP | 1977 to 1978 |
| 150 HP | 1978 |
| 175 HP | 1977 to 1978 |
| 200 HP | 1976 to 1978 |
| 235 HP | 1988 |
What's Included
| Component | Reference | Qty |
|---|---|---|
| Water pump impeller, 6 blade | 0389642 pattern, 89.66 mm by 32 mm | 1 |
| Drive key | Not supplied, check the old one | 0 |
| Liner, plate and gasket | Not supplied, order separately | 0 |
The Liner and the Plate
| Condition Inside the Pump | Impeller Only | What It Does |
|---|---|---|
| Liner polished and round | Enough on its own | Flow returns to normal |
| Liner grooved or scored | Wears out in weeks | Renew the liner with the impeller |
| Plate pitted under the blade tips | Flow stays low | Fit a new plate at the same time |
| Key slot burred | Impeller may spin | Dress the slot or renew the shaft |
| Cam surface worn | Pressure drops at speed | Pump body is past its life |
| Housing bolts corroded | Old hardware reused | Fit new bolts, do not force the old ones |
V4 and V6 Johnsons in Service
| How the Motor Is Used | Effect on the Impeller | What To Do |
|---|---|---|
| Workboat running all day | Continuous wear at cruise | Change on hours, keep a spare on board |
| Salt water, flushed rarely | Salt dries on the blades and the liner | Flush after every trip |
| Shallow ramps and sand | Grit scores the liner | Check the liner each season |
| Long periods idle at a mooring | Blades take a set | Renew before the season |
| Motor tilted up between trips | Pump drains, dry start | Lower fully and prime before starting |
| Old fuel and neglected cooling | Overheat damage follows | Fix the cooling system before the season |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the number on the old impeller, 0389642 and 777212 are the same body |
| 2 | Check the horsepower and year against the table, the 85 HP range is the widest |
| 3 | Drop the gearcase and check the liner and plate before fitting anything new |
| 4 | Find the drive key, a missing key leaves the impeller spinning on the shaft |
| 5 | Grease the liner and fold the blades in the running direction |
| 6 | Slide the impeller down square, never drive it with a hammer |
| 7 | Fit the plate, gaskets and housing, torque the bolts evenly |
| 8 | Run on muffs and watch the telltale before the boat goes in the water |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Check the number on the old impeller, 0389642, 777212 and 385528 are the same body
- Fits Johnson and Evinrude 85, 115, 135, 140, 150, 175, 200 and 235 HP motors
- Check the liner and plate, a grooved liner wears a new impeller out fast
- This is the impeller only, key, liner, plate and gaskets are not included
- Fold the blades in the running direction before fitting
- Run on muffs and check the telltale before launch
- 30-Day Easy Returns
- Ships from our warehouse with tracking
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Boat Owners' Review
Before You Buy
Frequently Asked Questions
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We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
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