Sierra Impeller 18-8924, Replaces 3C7650211M, Fits Tohatsu 60/70 3-Cyl, MD 70, MD 90 TLDI, 115, 140 HP
Sierra Impeller 18-8924, Replaces 3C7650211M, Fits Tohatsu 60/70 3-Cyl, MD 70, MD 90 TLDI, 115, 140 HP
The Sierra 18-8924 is a replacement water pump impeller engineered for Tohatsu outboard engines that rely on a rubber-vaned impeller to circulate raw cooling water through the powerhead. As the wear component inside the lower unit's water pump housing, the impeller's flexible vanes draw water in and push it up through the cooling passages; over time heat, running dry, and age cause the vanes to harden, crack, or lose their seal, which leads to overheating alarms and reduced water flow at the tell-tale. Replacing a worn impeller on schedule protects the powerhead from heat damage and restores proper cooling pressure. Sierra manufactures this impeller to meet or exceed the specifications of the original equipment part it replaces, and it is built for direct fitment on the applicable Tohatsu engine families without modification. This part is commonly serviced together with the water pump housing, wear plate, and gasket kit during a routine water pump overhaul. Refer to the fitment and cross-reference details below to confirm this is the correct impeller for your engine before ordering.
Specifications
- Brand: Sierra
- Manufacturer Part Number: 18-8924
- Product Dimensions: 2.7 x 2.4 x 2.2 inches
- Weight: 0.27 pounds
- UPC: 808282265793
- OEM Cross-Reference: 3C7650211M, 3B7650212M
Fitment
- Tohatsu 60 3-cyl (B & C models)
- Tohatsu 70 3-cyl (B & C models)
- Tohatsu MD 70
- Tohatsu MD 90 (TLDI)
- Tohatsu 115
- Tohatsu 140
- Tohatsu 90 2-Stroke
Replaces (OEM)
- 3C7650211M
- 3B7650212M
Frequently Asked Questions
What does the Sierra 18-8924 replace? The Sierra 18-8924 impeller is a direct cross-reference for OEM part numbers 3C7650211M and 3B7650212M.
Which Tohatsu engines fit this impeller? This impeller fits Tohatsu 60 3-cyl (B & C models), 70 3-cyl (B & C models), MD 70, MD 90 (TLDI), 115, 140, and 90 2-Stroke engines.
Is the 18-8924 a genuine OEM part or aftermarket? The 18-8924 is a Sierra-manufactured aftermarket impeller built to meet or exceed the specifications of the original equipment part it replaces.
What are the dimensions of this impeller? The Sierra 18-8924 measures 2.7 x 2.4 x 2.2 inches.
How much does the 18-8924 impeller weigh? It weighs 0.27 pounds.
How do I know if my old impeller needs replacing? Signs that the 18-8924 or any water pump impeller needs replacing include reduced water flow at the tell-tale stream, overheating alarms, and visibly cracked, curled, or stiff rubber vanes when the old impeller is removed.
Does the 18-8924 come with a housing or gasket? The 18-8924 is the impeller only; it does not include the water pump housing, wear plate, or gasket, which are sold separately for a full water pump rebuild.
Will this impeller fit a Tohatsu MD 90 TLDI? Yes, the Sierra 18-8924 is listed to fit the Tohatsu MD 90 (TLDI) engine.
Is there a warranty on the 18-8924 impeller? Sierra parts, including the 18-8924, are covered under Sierra's standard customer satisfaction warranty.
What material is the impeller made of? The 18-8924 is a rubber-vaned water pump impeller designed to seal and pump cooling water through the Tohatsu engines it fits.