Impeller 500377 ref. (Mercury 47-16154 3) – code: 1814302 – Motomarine

The impeller 500377 Motomarine, reference Mercury 47-16154 3 and code 1814302, is a spare part dedicated to the maintenance of the cooling circuit on outboard engines. In the nautical field, the impeller is a component subject to wear and is normally replaced during periodic interventions to maintain efficient water circulation in the system.

Spare part features and details

The product is identified as Impeller 500377 with reference Mercury 47-16154 3 and supplier code 1814302 (Motomarine S.R.L.).

References and codes

• Product code: 500377
• Original reference: Mercury 47-16154 3
• Code: 1814302
• Supplier: Motomarine S.R.L.

Indicated engine types (as per available data)

The impeller is indicated for the following types of engine/HP listed in the existing description:

• 2T: 2.5 / 3.3 / 4 / 5
• 4T: 2.5 / 3.5 / 4 / 5 / 6

Note: actual compatibility may depend on the year, version, and configuration of the water pump. In case of doubt, always compare the original reference and measurements.

Dimensions (as per specifications)

• ID: 10.25 mm
• D: 33.6 mm
• H: 14.3 mm
• Bushing: G

Typical applications in the nautical field

The impeller is a component of the water pump and is used in the cooling circuit of outboard motors. In practice, it helps move the water needed to cool the engine during operation.

This replacement part is normally chosen in contexts such as:

• Scheduled maintenance of the water pump group.
• Replacement due to wear or as a preventive intervention before the season.
• Restoration of the proper functioning of the cooling circuit after a prolonged stop.
• Workshop interventions or in storage, when checks and revisions of the lower unit/pump are performed (depending on the engine configuration).

Advantages for those who purchase the correct spare part

Select an impeller with corresponding code and measurements It is essential for a coherent assembly with the pump group and for orderly maintenance. In particular, this Motomarine impeller allows you to:

• Quickly identify the replacement thanks to the references (500377 / Mercury 47-16154 3 / 1814302).
• Verify dimensional correspondence through ID, D, and H reported on the sheet.
• Manage maintenance with a component dedicated to the cooling circuit, typically subject to periodic replacement.

Usage and operational notes

Replacing an impeller requires attention to correct positioning and the integrity of the pump group components. For an orderly intervention:

• Compare the codes (Mercury 47-16154 3) and the code 1814302 with what is provided for your engine.
• Check the measurements (ID 10.25 mm, D 33.6 mm, H 14.3 mm) against the existing impeller.
• Check the bushing indicated as G and compatibility with the housing.
• Inspect seat, cover, and water pump components during maintenance, replacing any worn parts as necessary.

To avoid incorrect purchases, if you are not sure of the reference, it is useful to have available: engine model, any original spare part code, and measurements of the removed impeller. In case of doubt, it is preferable to request a verification before ordering.

FAQ – Frequently Asked Questions

What are the reference codes for this impeller?

The product is identified as impeller 500377, with original Mercury reference 47-16154 3 and code 1814302 (Motomarine).

What measurements are reported in the datasheet for impeller 500377?

The indicated dimensions are: ID 10.25 mm, D 33.6 mm, and H 14.3 mm. The G bushing is also reported.

For which engines is it indicated according to the available description?

Based on the data present, it is indicated for 2T engines (2.5/3.3/4/5) and 4T (2.5/3.5/4/5/6). Actual compatibility may vary depending on the version and configuration of the water pump.

How can I verify if it is the right impeller for my outboard?

Compare the original Mercury reference 47-16154 3 and check the measurements (ID, D, H) against the removed impeller or the manufacturer's data. In case of doubt, it is advisable to request a verification before ordering.

What is the purpose of the impeller in the outboard engine?

The impeller is a component of the water pump and contributes to the circulation of water in the engine's cooling circuit.