Water Pump Impeller Kit 46-96148Q8 46-96148A8 46-96148A5 18-3517 for Mercury Mariner 75-225 HP Mercruiser Alpha MC1 Outboard Sterndrive — Australia Local Warehouse
Water Pump Impeller Kit 46-96148Q8 46-96148A8 46-96148A5 18-3517 for Mercury Mariner 75-225 HP Mercruiser Alpha MC1 Outboard Sterndrive — Australia Local Warehouse
Product Overview
Water pump impeller kit for Mercury Mariner outboards from 75 HP through 225 HP and for Mercruiser Alpha and MC1 sterndrives, supplied as 1 housing, 1 impeller, 1 wear plate, 1 water tube guide, gaskets, O-rings, drain screw washers and a mounting key, net weight 380 g. It replaces Mercury 46-96148A8, 46-96148Q8, 46-96148A5 and 46-96148T8 and crosses to Sierra 18-3517, 18-3319, 18-3314 and 18-3316, GLM 12280 and Mallory 9-48311. Shipped from our Australia local warehouse.
One kit covers both sides of the range because the pump body is shared. The same housing, impeller and wear plate sit on the V6 outboards from 75 HP up and on the Alpha and MC1 sterndrives, so the number on your old housing is usually 46-96148 in one of its suffixes.
The kit runs all the way down to the O-rings and the drain screw washers, which matters on a sterndrive where the pump sits behind the gear housing and a reused seal lets water into the gear oil.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Water pump impeller kit |
| Application | Mercury Mariner 75-225 HP outboards, Mercruiser Alpha and MC1 sterndrives |
| Housing | 1 x, 46-96148A1 |
| Impeller | 1 x, 47-89984 series |
| Net Weight | 380 g |
| Pack Size | 15 x 10 x 8 cm |
| Country of Origin | Taiwan |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| Mercury / Mariner | 46-96148A8, 46-96148A5, 46-96148Q8, 46-96148T8 |
| Mercury / Mariner | 46-32437A1, 46-37433A1, 46-42579A4, 46-44292A4 |
| Mercury / Mariner | 46-48747A3, 46-57234A3, 46-58618A4, 46-60367A1 |
| Mercury / Mariner | 46-60367A4, 46-64141A11, 46-69222A3, 46-73802A3 |
| Mercury / Mariner | 46-73804A3, 46-78400A2 |
| Mercruiser | 46-32437A3, 46-37433A1, 46-96148A8 |
| Sierra | 18-3517, 18-3319, 18-3314, 18-3316 |
| GLM | 12280 |
| Mallory | 9-48311 |
What's Included
| Component | Qty |
|---|---|
| Water pump housing 46-96148A1, 46-96148T1 | 1 |
| Impeller 47-89984 series, 47-803631T or 47-F694065 | 1 |
| Impeller wear plate 32435 | 1 |
| Water tube guide 23-29804, 32-29804T | 1 |
| Pump base gasket 27-42631-1 | 1 |
| Pump base gasket 27-85610-1 | 1 |
| Pump base gasket 27-32438 | 1 |
| Wear plate gaskets 27-85608-1 and 27-85609-1 | 2 |
| Water tube grommet 26-38970 | 1 |
| Oil passage seal 26-45577 | 1 |
| Drain screw washers 12-19183 | 2 |
| O-rings 25-30613, 25-33145, 25-30224, 25-90011 | 4 |
| O-rings 25-38099, 25-30271 | 2 |
| Mounting key 130K, 56654 | 1 |
Compatible Engines
| Family | Coverage |
|---|---|
| Mercury outboards | 80 HP to 200 HP DFI, by serial range below |
| Mariner outboards | 75 HP to 220 HP, by model year below |
| Mercruiser sterndrives | 120, 140, 165, 485, Alpha and MC1 by ratio below |
Mercury Serial Ranges
| Horsepower | Serial Range |
|---|---|
| 80 HP | 4831999 thru 9256130 |
| 90 HP | 4845301 thru 7123762 |
| 115 HP | 4855153 thru 8061269 |
| 140 HP | 4865678 and up |
| 150 HP DFI | 1B690542 thru 2B535572 |
| 175 HP DFI Pro XS | 1B516339 thru 2B535624 |
| 200 HP DFI XS ROS | 1E050852 and up |
Mariner Outboards
| Horsepower | Years |
|---|---|
| 75 HP | 1985 |
| 90 HP | 1984-1986 |
| 115 HP | 1980, 1984-1987 |
| 135 HP | 1986 |
| 150 HP | 1986-1987 |
| 175 HP | 1979-1980, 1985-1986, 1991 |
| 200 HP | 1980, 1982-1987, 1991 |
| 220 HP | 1979 onward, V6 block |
Mercruiser Alpha and MC1 Ratios
| Model | Ratios Covered | Years |
|---|---|---|
| 120, 140 | Single ratio | 1978 |
| 165 | Single ratio | 1978-1981 |
| 485 | Single ratio | 1980-1982 |
| ALPHA | 1.32, 1.47, 1.50, 1.62, 1.65, 1.81, 1.84, 1.94, 1.98 | 1988-1990 |
| MC1 | 1.32, 1.47, 1.50, 1.81, 1.84, 1.94, 1.98 | 1982-1987 |
| ALPHA Transom | Single ratio | 1990 |
Salt, Sand and the Tidal Run
| Australian Use | Effect on the Pump | What to Do |
|---|---|---|
| Bar crossings and shallow channels | Sand drawn through scores the housing liner | Inspect the liner with every impeller change |
| Warm northern water | Neoprene softens and takes a set faster | Shorten the service interval |
| Long runs at planing speed | Impeller works hard, tips wear first | Renew at 100 hours on working boats |
| Tidal ramps and sand launch | Grit in the water tube and grommet | Flush on muffs after the trip |
| Salt left in the housing between trips | Blades stick to the liner and tear on start | Never start dry, always on muffs |
| Boat kept on a mooring | Growth and silt at the pickup | Clear the intake before the season |
Gear Oil After the Job
| What You Find | What It Means | What to Do |
|---|---|---|
| Milky oil after the first run | Water past a seal, usually the ones in this kit | Strip and check the O-rings and drain washer |
| Oil level rising | Water entering the housing | Do not run it, find the leak |
| Metal on the drain plug magnet | Bearing or gear wear, not a pump fault | Check the gearcase before refilling |
| Clean oil after the change | Seals seated and the job is right | Recheck at 10 hours, then normal service |
| Water at the drain screw only | Drain washer reused or missing | Both washers are in the kit, use new ones |
| Leak at the water tube | Grommet rolled on assembly | New grommet and rubber grease on assembly |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the number on the pump housing, 46-96148 is the family this kit replaces |
| 2 | Check the drive ratio on the sterndrive, all the Alpha and MC1 ratios listed use this pump |
| 3 | Check the serial range on the outboard against the list above for the 75-225 HP V6 |
| 4 | Check the gear housing for scoring and the water tube for a swollen grommet seat |
| 5 | Fit the impeller with the blades folded in the direction of rotation and a smear of glycerine only |
| 6 | Use the new drain screw washers and O-rings from the kit, not the old ones |
| 7 | Pressure test the gear housing before refilling it with oil |
| 8 | Check the gear oil after the first run, milky oil means a seal was missed |
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 |
| Pacific islands | Australia local warehouse | Tracked shipping available |
Before You Buy
- Check the number on the pump housing, 46-96148 is the family this kit replaces
- Check the drive ratio on the sterndrive, all the Alpha and MC1 ratios listed use this pump
- Check the serial range on the outboard, the list above is the guide for the 75-225 HP V6
- Check the gear housing for scoring and the water tube for a swollen grommet seat
- Replace the drain screw washers and O-rings that come in the kit
- This is the pump kit, the gearcase oil and the gear housing seals are not included
- 30-Day Easy Returns
- Ships from our Australia local warehouse
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