Water Pump Impeller Kit 46-77516A3 for Mercury 30 35 40 50 60 70 HP 18-3322
Water Pump Impeller Kit 46-77516A3 for Mercury 30 35 40 50 60 70 HP 18-3322
Product Overview
Water pump impeller kit for Mercury outboards from 30 HP to 70 HP, replacing 46-77516A3 and 46-77177A3 and crossing to Sierra 18-3322, 18-3323 and 18-3324. It is the complete pump rebuild, supplied with the upper housing, impeller, face plate, base, gaskets, seals, O-rings and key.
This is the full kit rather than an impeller in a bag, which is what these pumps need. On the 30 to 70 HP Mercury three and four cylinder motors the housing and the face plate are both wear items, and a new impeller dropped into a scored housing runs hot from the first trip.
It covers the 30 HP and 30 HP jet, 35, 40 in two and four cylinder form, 45, 50 in three and four cylinder form, 60, 65 and 70 HP. Because Mercury changed the pump body inside those horsepower ratings over the years, check the serial number range in the table rather than the cowl decal.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Water pump impeller kit, complete |
| Horsepower Range | 30 HP to 70 HP |
| Engine Type | Two and three cylinder outboard |
| Kit Contents | Housing, impeller, face plate, base, gaskets, seals, O-rings, key |
| Shipping Weight | 224 g with packaging |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Mercury | 46-77516A3, 46-77177A3, 46-73640A2 |
| Mercury | 46-60366A1, 46-89983 |
| Sierra | 18-3322, 18-3323, 18-3324 |
| Impeller cross numbers | 17461-95201, 47-65959, 47-89983T |
Compatible Engines
| Horsepower | Engine | Notes |
|---|---|---|
| 30 HP | Standard | Serial 1271884, 1448139 |
| 30 HP Jet | Jet drive | Serial C159200 to G589999 |
| 35 HP | Standard | Serial 1571114 to 2453068 and 6445653 and up |
| 40 HP | Standard | Serial 2874704, 4362214 |
| 40 HP | Two cylinder | Through 1983, serial 4860103 and up |
| 40 HP | Four cylinder | Serial C159200 and up |
| 45 HP | Standard | Serial 5531630 and up |
| 50 HP | Standard | Serial 1521914, 2305100 |
| 50 HP | Four cylinder | Serial 4357640, 5531629, 4962056 and up |
| 50 HP | Three cylinder | Serial 6428681 to D000749 |
| 60 HP | Three cylinder | Serial 6428681 to D000749 |
| 65 HP | Three cylinder | Serial 3293184 to 4571651 |
| 70 HP | Three cylinder | Serial 4571652 to 6428680 |
| Mariner | 30 HP to 70 HP | Same pump as the Mercury models listed |
Serial Number Ranges
| Model | Serial Range |
|---|---|
| 65 HP three cylinder | 3293184-4382056 and 4382057-4571651 |
| 70 HP three cylinder | 4571652-4977156 and 4977157-6428680 |
Assembly Components
| Component | Part Number | Qty |
|---|---|---|
| Upper pump housing | 46-77822A1 | 1 |
| Water pump impeller | 47-89983 | 1 |
| Face plate | 54705 | 1 |
| Stainless pump bowl | 48753 | 1 |
| Pump housing gasket set | Not published | 5 |
| Rubber seal and washer | Not published | 2 |
| O-ring set | Not published | 3 |
| Water seal and shim | Not published | 2 |
| Impeller drive key | Not published | 1 |
What's Included
| Component | Qty |
|---|---|
| Upper pump housing | 1 |
| Water pump impeller | 1 |
| Face plate | 1 |
| Stainless pump bowl | 1 |
| Gaskets, seals, O-rings and washers | Set |
| Impeller drive key | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Check the serial number against the table, Mercury used more than one pump across 30 to 70 HP
- Match the old housing against 46-77822A1 before ordering, the earlier housing is a different casting
- Check the driveshaft splines while the housing is off, a dry spline will strip in the crank
- Note the shift shaft position before the gearcase drops and do not turn it once it is free
- Fit the key and check the impeller turns with the shaft before the housing goes back on
- Lubricate the impeller with glycerine and turn the shaft by hand to set the blade direction
- Check the telltale at idle and again at planing speed on the first run
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Before You Buy
Frequently Asked Questions
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