Sierra 18-3277 Impeller Kit - Replaces 3862567, 21213660 - Fits Volvo Engines 1999 and Later

The Sierra 18-3277 Impeller Kit provides the water pump impeller and hardware needed to keep the raw water cooling system of qualifying Volvo marine engines running reliably. The impeller is the core wear component in a raw water pump, drawing in water and circulating it through the engine's cooling passages to control operating temperature. Over time impeller vanes lose flexibility and can crack or shed material, leading to reduced water flow and overheating, so replacement on a regular service interval or at the first sign of reduced water flow is standard marine maintenance practice. This kit is built to Sierra's quality standard, engineered to meet or exceed the performance of the original equipment part it replaces. It is designed as a direct fit for Volvo engines from 1999 and later, and it cross-references directly to the OEM Volvo part numbers listed below, so it can be ordered using either the Sierra part number or the original Volvo number. Installation follows standard raw water pump service procedures: the pump housing is opened, the old impeller is removed, and the new impeller is installed along with any applicable seals or gaskets, then the housing is reassembled. Keeping a spare 18-3277 impeller kit on board is a common practice for boat owners who want to avoid unexpected downtime from a worn impeller while underway.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3277
• UPC: 808282265502
• Weight: 0.29 pounds
• Number of Items: 1
• Color: White
• Style: Classic
• Fitment: Volvo (1999 and Later)

Fitment

• Volvo - 1999 and Later

Replaces (OEM)

• 3862567
• 21213660

Frequently Asked Questions

What does the Sierra 18-3277 Impeller Kit fit? The Sierra 18-3277 Impeller Kit is designed to fit Volvo marine engines from 1999 and later.

What OEM part numbers does the 18-3277 replace? This kit replaces OEM Volvo part numbers 3862567 and 21213660, so it can be ordered as a direct substitute for either of those numbers.

Is the Sierra 18-3277 a genuine Volvo part or an aftermarket replacement? The 18-3277 is a Sierra-manufactured replacement part, built to meet or exceed the performance of the original Volvo 3862567 and 21213660 impellers it replaces, rather than a Volvo-branded OEM part.

How much does the impeller kit weigh? The Sierra 18-3277 Impeller Kit weighs 0.29 pounds.

How many impellers are included in the kit? The 18-3277 kit includes one impeller, listed as a single-item unit.

What color is the Sierra 18-3277 impeller? The impeller in the 18-3277 kit is white.

How do I know if my impeller needs to be replaced? Reduced raw water flow, engine overheating, or visible cracking and missing vanes on the old impeller are signs the 18-3277 kit should be installed. Marine engine cooling systems rely on flexible impeller vanes to move water, and these vanes degrade with age and heat exposure.

Can I use the 18-3277 kit on any Volvo engine? The 18-3277 is fitted specifically to Volvo engines from 1999 and later, so it should be matched against that fitment before ordering rather than assumed to fit earlier Volvo engine years.

Does the Sierra 18-3277 come with a warranty? The Sierra 18-3277 Impeller Kit is covered by a limited warranty from Sierra.

Why choose Sierra over the original Volvo part? Sierra manufactures the 18-3277 to meet or exceed the specifications of the original equipment part it replaces, while cross-referencing directly to Volvo part numbers 3862567 and 21213660, giving boat owners a compatible option alongside the original OEM part.

What is included with the 18-3277 kit? The kit includes the impeller itself as a single component, packaged as the Sierra 18-3277 Impeller Kit.