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What is the Sierra 18-2646-1 MerCruiser Alpha One Gen II Lower Unit Seal Kit used for?
The Sierra 18-2646-1 MerCruiser Alpha One Gen II Lower Unit Seal Kit is used on all MerCruiser Alpha I Gen II lower units from 1991-up. The kit contains multiple oil seals, O-rings, gaskets, a sealing washer, a seal, and a face seal and tool.
What MerCruiser lower units does the Sierra 18-2646-1 seal kit fit?
The Sierra 18-2646-1 Lower Unit Seal Kit is listed for all MerCruiser Alpha I Gen II lower units from 1991-up. Verify that your lower unit is an Alpha I Gen II model and falls within the listed year range before purchasing.
What is included in the Sierra 18-2646-1 MerCruiser lower unit seal kit?
The kit includes the Sie-18-2599 Face Seal And Tool, Sie-18-2564 and Sie-18-2566 water pump gaskets, Sie-18-2945 sealing washer, Sie-18-2944 seal, six oil seals, and seven O-rings. The included components cover the seals and gaskets specifically listed in the product description.
Does the Sierra 18-2646-1 seal kit include a face seal tool?
Yes. The Sierra 18-2646-1 kit includes the Sie-18-2599 Face Seal And Tool. It also contains the Sie-18-2564 Water Pump Base To Face Plate Gasket and Sie-18-2566 Face Plate To Water Pump Cover Gasket.
What part numbers are interchangeable with the Sierra 18-2646-1 lower unit seal kit?
The Sierra 18-2646-1 MerCruiser Alpha One Gen II Lower Unit Seal Kit is interchangeable with Mallory 9-74206, GLM 87511, and MerCruiser Stern Drive 26-816575A1 and 26-816575A3. Verify your existing part number and lower-unit application before purchasing.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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