Impeller 50031N ref. (Mercury 47-43026Q02) – code: 1814304 – Motomarine

Motomarine impeller 50031N – replacement ref. Mercury 47-43026Q02 (code 1814304)

The Motomarine impeller 50031N is a replacement dedicated to maintenance of the cooling circuit on engines and drives compatible with reference Mercury 47-43026Q02. Designed for replacement in the nautical field, it is suitable for ordinary and extraordinary interventions on outboards and Mercruiser applications, where the impeller is a component subject to wear and therefore needs to be checked periodically.

This item is identified by the supplier product code 1814304 and is offered as a practical solution for those who wish to restore the correct water circulation in the cooling system, maintaining the configuration provided by the pump group manufacturer.

Spare part features and details

The impeller is supplied by Motomarine S.R.L. and refers to Mercury codes commonly used during spare part searches. For a correct selection, it is always recommended to verify the code shown in the engine/gearbox spare parts manual or on the removed impeller.

References and codes

• Impeller model: 50031N
• Mercury reference: 47-43026Q02
• Other indicated references: 43026Q02 / 43026T2 / 8M0100553
• Supplier product code: 1814304

Dimensions and configuration

• Internal diameter: 22.4 mm
• Outer diameter: 89 mm
• Height: 32.5 mm
• Number of blades: 6
• Bushing type: G

Indicated compatibility (to be verified on engine/gearbox)

Below are the applications listed in the existing sheet. Compatibility may vary depending on year, version, gearcase, and pump configuration: always compare before purchasing codes and measurements.

For 2T models

• 70
• 75
• 90
• 100
• 115

For 4T models

• F40
• F70
• F80
• F90
• F100
• F115
• F135
• F150
• F200
• F225
• F250 VERADO

For Mercruiser gearcases

• Alpha One Gen. II

Typical applications in the nautical field

The impeller is a central component of the water pump: its function is to promote the circulation of water in the engine cooling circuit. In the nautical field, use and environment (storage, docking, presence of sediments, periods of inactivity) can contribute to the wear of the component.

This spare part is suitable for:

• Scheduled maintenance of the water pump group on compatible outboard engines and lower units.
• Restoration interventions when overhauling the pump or replacing related components.
• Seasonal checks before launching or after periods of inactivity, when you want to check the condition of the impeller.

Advantages for workshops and boaters

A correctly selected and installed impeller allows the pump group to be restored to the intended conditions, reducing the risk of repeated interventions due to dimensional incompatibilities or incorrect references. The 50031N Motomarine, thanks to the references provided and the available measurements, allows a quick cross-check before installation.

• Clear identification via supplier code 1814304 and Mercury reference 47-43026Q02.
• Immediate verification through dimensions (internal/external diameter, height) and number of blades.
• Suitable for maintenance on indicated applications (2T, 4T and Mercruiser Alpha One Gen. II lower unit), with control always recommended in the spare parts manual.
• Technical replacement designed for professional contexts (nautical workshops) and for boaters who perform conscious maintenance.

Usage and important notes

For a correct impeller replacement, it is good practice to operate following the procedures provided by the engine/lower unit manufacturer. In case of doubts about compatibility, verification through code and measurements is the most reliable method.

Verification tips before purchase

• Compare the Mercury reference 47-43026Q02 (and other indicated codes) with the exploded spare parts diagram of your engine/lower unit.
• Verify that the measurements (22.4 mm internal, 89 mm external, 32.5 mm height) match the installed impeller.
• Check the configuration (6 blades) and the G type bushing based on the pump group.

Installation notes

• During disassembly, inspect the pump housing and check that there are no residues or fragments of the old impeller.
• If the removed impeller shows signs of wear or damage, also assess the condition of the other components of the pump group according to the manufacturer's indications.
• After assembly, perform the functional checks required by the engine/drive maintenance procedure.

Note: The listed compatibilities are those reported in the original description. To avoid errors, always refer to the spare parts manual or the replaced impeller code.

FAQ – Frequently Asked Questions

Is this impeller compatible with Mercury reference 47-43026Q02?

Yes, the Motomarine 50031N impeller is indicated as a replacement with Mercury reference 47-43026Q02. Before purchase, it is recommended to verify the code in the spare parts manual or on the removed impeller.

What other reference codes are listed for this impeller?

The sheet also indicates references 43026Q02, 43026T2, and 8M0100553, useful for searching and comparing the replacement.

What are the dimensions of the 50031N impeller?

The reported measurements are: inner diameter 22.4 mm, outer diameter 89 mm, and height 32.5 mm. The impeller has 6 blades and G type bushing.

For which models is compatibility indicated in the description?

The description lists applications for 2T models (70, 75, 90, 100, 115), for 4T models (F40, F70, F80, F90, F100, F115, F135, F150, F200, F225, F250 VERADO) and for Mercruiser Alpha One Gen. II drives. Verification in the spare parts manual is always recommended.

How can I be sure to purchase the correct impeller?

The safest method is to compare the Mercury reference and the measurements (inner/outer diameter and height) with the installed impeller or with the exploded spare parts diagram of your engine/drive, also considering the number of blades and bushing type.