Sierra Upper Unit Seal Kit - SIE-18-2644

Sierra 18-2644 MerCruiser Alpha I Gen II Drive Shaft Housing Seal Kit

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

For Alpha I Gen II

Kit Contains:

(1) 18-2003 Oil Seal

(2) 18-2056 Oil Seal

(1) 18-2715 Check Valve Kit

(1) 18-2944 Seal Ring Gasket

(1) 18-2945 Drain Screw Gasket

(1) 18-3289 Double Lip Seal

(2) 18-7103 O-Ring

(1) 18-7117 O-Ring

(1) 18-7161 O-Ring

(1) 18-7169 O-Ring

(1) 18-7188 O-Ring

(2) 18-7420 O-Ring

Application:

• MerCruiser Stern Drive

Alpha One Gen II

1991-1995

0D469859 thru 0F679999

Alpha One Gen II

1996-1997

0F680000 thru 0K999999

Alpha One Gen II

1998

0L100040 & up

Interchangeable With:

GLM

87501

Mallory

9-74302

Mercruiser Stern Drive

26-88397A1

Frequently Asked Questions

• What is the Sierra 18-2644 MerCruiser Alpha I Gen II Drive Shaft Housing Seal Kit used for? The Sierra 18-2644 Drive Shaft Housing Seal Kit is designed for MerCruiser Alpha One Gen II stern drives. The kit contains oil seals, a check valve kit, seal and drain screw gaskets, a double lip seal, and multiple O-rings for the listed applications.
• Which MerCruiser Alpha One Gen II drives does the Sierra 18-2644 seal kit fit? The Sierra 18-2644 is listed for Alpha One Gen II stern drives from 1991–1998. Specific applications are identified by model year and serial number, including 0D469859 through 0F679999, 0F680000 through 0K999999, and 0L100040 and up.
• What is included in the Sierra 18-2644 Drive Shaft Housing Seal Kit? The kit includes one 18-2003 oil seal, two 18-2056 oil seals, one 18-2715 check valve kit, one 18-2944 seal ring gasket, one 18-2945 drain screw gasket, one 18-3289 double lip seal, and multiple O-rings in the specified part numbers and quantities.
• What years of MerCruiser Alpha One Gen II stern drives are covered by the Sierra 18-2644? The listed applications cover 1991–1995 Alpha One Gen II drives with serial numbers 0D469859 through 0F679999, 1996–1997 models with serial numbers 0F680000 through 0K999999, and 1998 models with serial number 0L100040 and up.
• What part numbers are interchangeable with the Sierra 18-2644 seal kit? The Sierra 18-2644 is listed as interchangeable with GLM 87501, Mallory 9-74302, and MerCruiser Stern Drive 26-88397A1. Verify your existing part number and Alpha One Gen II application before ordering.
• How should I verify fitment for the Sierra 18-2644? Check that your stern drive is an Alpha One Gen II and compare its model year and serial number with the listed application ranges. The applicable ranges vary by year, so verify the serial number before purchasing the seal kit.