Water Pump Impeller 0377230 377230 18-3083 for Johnson Evinrude 35 40 50 55 HP Outboard
Water Pump Impeller 0377230 377230 18-3083 for Johnson Evinrude 35 40 50 55 HP Outboard
Product Overview
Water pump impeller for Johnson and Evinrude two stroke outboards from 35 HP to 55 HP, the six blade neoprene impeller that moves cooling water up to the powerhead. It replaces 0377230, 377230, 0777213, 777213, 0777821 and 777821 and crosses to Sierra 18-3083, GLM 89660, CEF 500352 and Mallory 9-45209, and it is one impeller with a drive key.
The impeller measures 69.85 mm outside diameter, 21.84 mm high and 16 mm at the hub with a keyway, and those three numbers decide whether it fits. A pump that takes this impeller will not take a 2.75 in impeller from another family, and a keyed shaft is not interchangeable with a splined one.
On these older motors the impeller is the part that ends the season: neoprene takes a set when it sits dry over winter, and the vanes that were straight in October are curled and cracked by May. Run a motor with a set impeller and the first thing you notice is a weak tell tale, then a hot powerhead.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Outboard water pump impeller |
| Blades | 6 |
| Outside Diameter | 69.85 mm (2.75 in) |
| Height | 21.84 mm (0.86 in) |
| Shaft Bore | 16 mm (0.63 in) with keyway |
| Material | Neoprene, fuel and salt water resistant |
| Net Weight | 64 g |
| Country of Origin | Taiwan |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Johnson, Evinrude | 0377230 |
| Johnson, Evinrude | 377230 |
| Johnson, Evinrude | 0777213 |
| Johnson, Evinrude | 777213 |
| Johnson, Evinrude | 0777821 |
| Johnson, Evinrude | 777821 |
| Sierra | 18-3083 |
| GLM | 89660 |
| CEF | 500352 |
| Mallory | 9-45209-10, 9-45209 |
Compatible Engines
| Horsepower | Years | Stroke |
|---|---|---|
| 35 HP | 1958 to 1959 | Two stroke |
| 40 HP | 1960 to 1970 | Two stroke |
| 50 HP | 1971 to 1978 | Two stroke |
| 55 HP | 1976 to 1978 | Two stroke |
What's Included
| Component | Detail | Qty |
|---|---|---|
| Impeller | 6 blade neoprene, 69.85 mm | 1 |
| Drive key | Included with the impeller | 1 |
| Pump housing, wear plate and gaskets | Not included, order separately | 0 |
When the Impeller Needs Renewing
| What You See | What It Means | What To Do |
|---|---|---|
| Weak or missing tell tale | Vanes set or broken | Renew the impeller before the next run |
| Motor hot at idle only | Impeller slipping at low rpm | Renew the impeller, check the key |
| Rubber pieces in the thermostat | Vanes have broken up | Renew and flush the cooling passages |
| Vanes curled in one direction | Stored dry and set | Renew, the pump cannot recover |
| Cracks at the base of the vanes | Age and UV | Renew every season on an old motor |
| Overheat after a shallow water start | Sand and grit in the pump | Renew, flush and check the strainer |
Older Johnson and Evinrude Pumps
| How the Motor Is Used | Effect on the Impeller | What To Do |
|---|---|---|
| Laid up wet over winter | Fouling and a set impeller | Renew in spring before the first trip |
| Stored dry | Vanes curl and crack | Renew, do not run it to see if it works |
| River and shallow water | Grit wears the vane tips | Check the strainer, renew the impeller annually |
| Salt water | Salt crystals stiffen the rubber | Flush on muffs after every trip |
| Long periods between use | Rubber ages on the shelf too | Check the date and the vane condition |
| Modified or tired motor | Runs hot already | Renew the impeller first, then look elsewhere |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the number on the old impeller, 0377230 crosses to Sierra 18-3083 |
| 2 | Measure the housing, 69.85 mm outside diameter and 21.84 mm high |
| 3 | Drop the lower unit and split the pump housing |
| 4 | Check the wear plate and the housing liner for scoring before refitting |
| 5 | Grease the impeller lightly and fit the drive key in the shaft slot |
| 6 | Fold the vanes in the direction of shaft rotation as the housing goes down |
| 7 | Check the key has not dropped out before tightening the housing |
| 8 | Run on muffs and confirm a strong tell tale before the next trip |
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, 0377230 and Sierra 18-3083 interchange
- 69.85 mm outside diameter, 21.84 mm high, 16 mm keyed hub
- Fits Johnson and Evinrude 35, 40, 50 and 55 HP two strokes, 1958 to 1978
- Some listings narrow the 40 HP to 1968 to 1970 and the 50 HP to 1971 to 1975, check your model year
- This is the impeller with a drive key, the housing and gaskets are not included
- Renew the impeller every season, a set impeller will not pump
- 30-Day Easy Returns
- Ships from our warehouse with tracking
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Before You Buy
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