Sierra 18-3207 Water Pump Kit Mercury 35-70HP 47-89983T1
18-3207
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Sierra 18-3207 Water Pump Kit
Impeller and seal service kit | 47-89983T1
The Sierra 18-3207 water pump repair kit contains the impeller and the principal gaskets, washers, plate and O-rings used during a full service on compatible Mercury outboards. Renewing the complete set helps support reliable cooling-water circulation.
Key Features
- ✔ Genuine Sierra-branded aftermarket repair kit
- ✔ Includes Sierra 18-3007 impeller
- ✔ Includes pump plate, gaskets, washers and O-rings
- ✔ For selected Mercury two-stroke outboards
- ✔ Suitable for complete water-pump servicing
Technical Specs
| Brand | Sierra |
| Kit number | 18-3207 |
| Impeller | 18-3007 / Mercury 47-89983 |
| Kit type | Complete water pump repair kit |
| Application | Selected Mercury 35–70HP two-stroke |
| Quantity | 1 kit |
Compatibility / Fitment Guide
Listed for selected Mercury 30 Jet applications (approximately 1989–1997), certain 35HP two-cylinder engines, 40HP four-cylinder engines and other compatible 40–70HP two-stroke models. Confirm the gearcase, original pump reference and serial number before purchase.
Part Number Cross Reference
| Sierra | 18-3207; 18-3207D |
| Mercury / Quicksilver | 47-89983T1; 47-89983T2; 47-89983Q1 |
| Mallory | 9-483; 9-48300 |
| GLM | 12250 |
This is a genuine Sierra aftermarket kit and is not supplied as a Mercury or Quicksilver component.
Questions & Answers
Is the impeller included?
Yes. The kit includes Sierra 18-3007 plus the listed service gaskets and seals.
Does it fit every 40–70HP Mercury?
No. Check the original pump reference, gearcase and serial number.
Is this genuine Mercury?
No. It is a Sierra replacement kit.
Do I need sealant?
Use only lubricants or sealants specified by the engine workshop manual for the applicable surfaces.
Note: Inspect the housing and water tube while servicing and replace any component showing wear, scoring or distortion.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
