Impeller 50378 ref. (Mercury 47-19453T) – code: 1814305 – Motomarine

The impeller 50378 Motomarine, reference Mercury 47-19453T and product code 1814305, is a spare part dedicated to the maintenance of the cooling circuit of outboard engines. In the nautical field, the impeller is a component subject to wear and its periodic replacement is part of typical routine maintenance activities: choosing a spare part with clear references to the original codes helps reduce errors during ordering and installation.

Spare part features and details

References and codes

• Model / reference: 50378
• Original ref: Mercury 47-19453T
• Supplier code: 1814305
• Supplier: Motomarine S.R.L.

Indicated compatibility (as per available data)

The reported compatibility is that present in the provided information and should be understood as a general reference for identifying the spare part.

• Engine type: HP 2T (45/50/55/60) – 4T (30/40/50/60)

Dimensions (as per available specifications)

• ID: mm 19.25
• D: mm 78.2
• H: mm 25.15
• Bushing: G

Typical applications in the nautical field

The impeller is commonly used in the water pump of the engine and contributes to the circulation of water in the cooling system. In a maintenance context onboard or in the workshop, this spare part is mainly chosen when:

• the scheduled maintenance of the outboard;
• an intervention is carried out on the water pump assembly and it is preferred to replace the components subject to wear;
• the efficiency of the circuit must be restored after a prolonged stop or after use in harsh conditions.

For a correct selection, in addition to the indicated compatibility, it is good practice to check the reference codes (50378 / 47-19453T / 1814305) and the measurements reported.

Advantages for those who purchase a spare part identified by code

Why codes matter

• Reduction of ordering errors: the Mercury 47-19453T reference allows a direct comparison with spare parts lists and technical documentation.
• Immediate identification: the code 1814305 and the denomination 50378 help manage workshop requests and reorders.
• Dimensional comparison: ID, D and H allow a practical check with the existing component when there is no absolute certainty of the model.

“Conscious maintenance” approach”

Replacing the impeller is among the interventions that can prevent issues related to cooling. A properly selected and installed replacement helps keep the system in the conditions specified by the manufacturer.

Usage and operational notes

For the installation of the impeller, it is advisable to follow the procedures provided for your engine and, if necessary, rely on qualified personnel. Below are some general notes useful during the replacement management phase.

Checks before purchase

• Check the original reference: Mercury 47-19453T.
• Check the measurements: compare ID, D, and H with the removed impeller or with the engine's technical sheet.
• Confirm the engine type: 2T or 4T and the HP range indicated in the available data.

Notes for replacement

• Pump assembly inspection: during replacement it is common to check the general condition of the group components (seats, wear, any residues).
• Correct assembly: make sure the impeller is positioned correctly according to the engine manufacturer's instructions.
• Replacement traceability: keep the references 50378 / 47-19453T / 1814305 for future maintenance or reorders.

If you are not sure about compatibility, provide technical support with the engine model and the codes reported in this sheet: it is the fastest way for a cross-check.

FAQ – Frequently Asked Questions

What is the original reference of this impeller?

The original reference indicated on the sheet is Mercury 47-19453T.

What is the Motomarine product code for this impeller?

The supplier/product code reported is 1814305 (Motomarine).

For which types of engines is compatibility indicated?

The compatibility indicated in the available data is for 2T engines (45/50/55/60) and 4T (30/40/50/60). Verification through original code and measurements is still recommended.

What measurements are available to verify the impeller?

The following measurements are reported: ID mm 19.25, D mm 78.2, H mm 25.15. Bushing G is also indicated.

How can I be sure to order the correct replacement part?

Check the Mercury 47-19453T reference and compare the measurements (ID, D, H) with the impeller removed or with the engine documentation. In case of doubts, provide the engine model and codes 50378/1814305 to support.