Water Pump Impeller Kit with Gasket 689-44352-02 for Yamaha 20 25 30 HP
Water Pump Impeller Kit with Gasket 689-44352-02 for Yamaha 20 25 30 HP
Product Overview
Water pump impeller kit for the Yamaha 20, 25 and 30 HP outboards, supplied as 1 x impeller, 1 x key and 1 x gasket. The kit replaces Yamaha 689-44352-02, 689-44352-01 and 689-44352-00, it crosses to Sierra 18-3067, the impeller is 68.52 mm outside diameter with 6 blades and a key drive shaft, and it covers the 20C from 1985 to 1996, the 25 HP from 1984 to 1997 and the 30 HP from 1984 to 1992.
This is the service kit that goes into the water pump at the top of the lower unit. The impeller is the rubber wheel the driveshaft turns, and it is the part that pushes the cooling water up to the engine.
The blades take a set when the engine sits. A boat that is used twice a season wears its impeller out from standing rather than from running, because the blades stay bent in one position and crack at the root.
The key and the gasket are in the kit because they do not survive being taken apart. The key takes the drive from the shaft and a worn one lets the impeller slip, and the gasket seals the pump housing back onto the gearcase.
The sizes are given because an impeller is bought on its dimensions. This one is 68.52 mm outside, 16.03 mm inside and 13.02 mm tall, with six blades and a key drive, which is the pump fitted to the 20, 25 and 30 HP engines listed below.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Water pump impeller kit |
| Yamaha Part Numbers | 689-44352-02, 689-44352-01, 689-44352-00 |
| Sierra Number | 18-3067 |
| Fits | Yamaha 20 HP, 25 HP and 30 HP outboards |
| Models | 20C, 30EL, 30ES, C30EL, CV30EL |
| Years | 1984 to 1997, see the fitment table below |
| Parts In Kit | 3 pieces |
| Quantity | 1 impeller, 1 key and 1 gasket |
| Packaging | Pack |
| Warranty | 3 year |
OEM Cross Reference
| Component | Numbers |
|---|---|
| Water pump impeller kit | 689-44352-02, 689-44352-01, 689-44352-00 |
| Sierra | 18-3067 |
Compatible Engines
| Horsepower | Model | Years |
|---|---|---|
| 20 HP | 20C | 1985, 1986, 1996 |
| 25 HP | Not stated on the listings | 1984 to 1997 |
| 30 HP | 30EL, 30ES, C30EL, CV30EL | 1984 to 1992 |
The 20 HP application is the 20C in 1985, 1986 and 1996, and the 30 HP covers the 30EL, 30ES, C30EL and CV30EL from 1984 to 1992. The 25 HP fitment on the original listing is given as a year range from 1984 to 1997 without model codes. If your engine is a 25 HP, send us the model and year and we will confirm the pump against it before you order rather than guess from the horsepower alone.
Impeller Dimensions
| Measurement | Value |
|---|---|
| Outer diameter | 68.52 mm |
| Inner diameter | 16.03 mm |
| Height | 13.02 mm |
| Number of blades | 6 |
| Shaft type | Key drive |
| Material | Neoprene rubber |
These are the dimensions from the manufacturer listing for this kit. Check them against the impeller you are taking out: a 68.52 mm outside diameter impeller will not fit a housing bored for a different size, and the 16.03 mm bore has to sit on the driveshaft without rocking.
What's Included
| Component | Detail | Qty |
|---|---|---|
| Impeller | 68.52 mm outside diameter, 6 blades, key drive, neoprene | 1 |
| Key | Drives the impeller on the shaft | 1 |
| Gasket | Seals the pump housing to the gearcase | 1 |
| Pump housing | Not included | 0 |
Key Features
| Feature | Detail |
|---|---|
| Complete kit | Impeller, key and gasket in the one pack |
| Direct replacement | Fits in place of Yamaha 689-44352-02, 689-44352-01 and 689-44352-00 |
| Cross referenced | Sierra 18-3067 |
| Six blades | Neoprene rubber, 68.52 mm outside diameter |
| Key drive | The shaft drives through a key, not a spline |
| 20, 25 and 30 HP | Covers the 20C, and the 30EL, 30ES, C30EL and CV30EL |
Signs The Impeller Has Failed
| What You See | What It Means | Action |
|---|---|---|
| Overheat at low speed, fine at speed | Impeller blades worn or set | Fit the kit |
| Weak telltale at idle | Impeller not moving enough water | Fit the kit |
| Rubber pieces in the telltale | Blades breaking up | Fit the kit and flush the passages |
| No telltale at all | Impeller failed, or the key has gone | Fit the kit |
| Overheat after a winter lay up | Blades set in one position over the winter | Fit the kit before the season |
| Impeller looks fine but slips | Worn key, not a worn impeller | Fit the kit, the key is supplied |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the model and year against the fitment table above |
| 2 | Take the lower unit off and split the pump housing |
| 3 | Note which way the blades lean before the old impeller comes out |
| 4 | Take the key out and check the shaft for wear where it sits |
| 5 | Clean the housing and the plate, and check them for grooves |
| 6 | Fit the new impeller with the blades bent in the direction of rotation |
| 7 | Fit the key, the gasket and the housing, and tighten the bolts evenly |
| 8 | Run the engine on muffs and check the telltale before the boat goes back in |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 year |
| Packaging | Pack |
Before You Buy
- Water pump impeller kit with impeller, key and gasket
- Replaces Yamaha 689-44352-02, 689-44352-01 and 689-44352-00
- Crosses to Sierra 18-3067
- 68.52 mm outside diameter, 16.03 mm inside, 13.02 mm high
- Six blades, key drive, neoprene rubber
- Fits the 20 HP 20C in 1985, 1986 and 1996
- Fits the 25 HP from 1984 to 1997
- Fits the 30 HP 30EL, 30ES, C30EL and CV30EL from 1984 to 1992
- Supplied as 1 impeller, 1 key and 1 gasket
- 30-Day Easy Returns
- Free Worldwide Shipping
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Boat Owners' Review
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