Sierra 18-3147 MerCruiser Alpha One Gen II Water Pump Kit

Sierra 18-3147 MerCruiser Alpha Gen II Water Pump Kit

Sierra high-quality engine parts are designed to meet OEM specifications.

• For use with Gen II Lower S/N D469859 and Up.

Kit Includes:

• Carrier Seal 18-2354
• Impeller 18-3056
• Impeller Plate 18-3122
• Impeller Key 18-3293
• O-Ring 18-7420 
• Seal Ring Gasket 18-2944
• Face Seal and Tool 18-2599
• Water Pump Base to Face Plate Gasket 18-2564
• Face Plate to Water Pump Cover Gasket 18-2566

Interchangeable With:

• Mercury
• 817275T4
• 817275Q05
• 817275K05
• 817275Q4
• Mallory
• 9-48315
• GLM
• 12414
• Mercury Marine
• 817275A5
• Redline
• RL3147

Frequently Asked Questions

What is the Sierra 18-3147 MerCruiser Alpha Gen II Water Pump Kit used for?

The Sierra 18-3147 MerCruiser Alpha Gen II Water Pump Kit is designed for use with Gen II lower units with serial numbers D469859 and up. Sierra states that its high-quality engine parts are designed to meet OEM specifications.

What MerCruiser application does the Sierra 18-3147 Water Pump Kit fit?

This water pump kit is specified for Gen II lower units with serial numbers D469859 and up. Check your lower unit serial number before purchase to verify that the Sierra 18-3147 kit is appropriate for your application.

What is included in the Sierra 18-3147 Water Pump Kit?

The kit includes a carrier seal, impeller, impeller plate, impeller key, O-ring, seal ring gasket, face seal and tool, water pump base to face plate gasket, and face plate to water pump cover gasket. Each component is identified by a Sierra part number in the supplied product information.

Is the Sierra 18-3147 Water Pump Kit interchangeable with Mercury parts?

Yes. The supplied information lists Mercury 817275T4, 817275Q05, 817275K05, 817275Q4, and Mercury Marine 817275A5 as interchangeable part numbers for the Sierra 18-3147 Water Pump Kit.

What other part numbers interchange with Sierra 18-3147?

In addition to the listed Mercury part numbers, Sierra 18-3147 is interchangeable with Mallory 9-48315, GLM 12414, and Redline RL3147. Verify the applicable part number and your Gen II lower unit serial number before purchase.

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