Sierra / Mallory

Use With:

• 18-1236: Drain Screw

Interchanges/Replaces

Johnson/Evinrude Outboard

• 336982

Mallory

• 9-76653

Additional Details:

• Thread Size: 10 x1
• Location: Cylinder Block
• Models: MD1A, B, 2A, B, 5A, B, MD6A

Interchanges/Replaces

Volvo Penta

• 807036

Key Features:

• Used with most O.E.M. Manifolds

Additional Details:

• Material: Brass
• Size: 1/4" NPT or 6.4mm
• Fits: MerCruiser cylinder blocks & exhaust manifolds

Interchanges/Replaces

GLM

• 13993

Mallory

• 9-41201

Mercruiser Stern Drive

• 22-16951A1
• 22-16951Q1
• 22-16951T1
• 22-16951T1
• 22-64426
• 22-87238

OMC Inboard

• 379957

OMC Stern Drive

• 379957

Volvo Penta

• 82745

Key Features:

• Used with most O.E.M. Manifolds

Additional Details:

• Material: Brass
• Size: 1/4" NPT or 6.4mm
• Fits: MerCruiser cylinder blocks & exhaust manifolds

Interchanges/Replaces

GLM

• 13993

Johnson/Evinrude Outboard

• 379957

Mallory

• 9-41201

Mercruiser Stern Drive

• 22-16951A1
• 22-16951Q1
• 22-16951T1
• 22-16951T1
• 22-64426
• 22-87238

OMC Inboard

• 379957

OMC Stern Drive

• 379957

Volvo Penta

• 82745

Use With:

• 18-2387: Lower Unit Drain/Fill Screw

Interchanges/Replaces

Johnson/Evinrude Outboard

• 311598

Mallory

• 9-60408

OMC Stern Drive

• 311598
• 3852105

Volvo Penta

• 3852105

Use With:

• 18-2387: Lower Unit Drain/Fill Screw

Interchanges/Replaces

Johnson/Evinrude Outboard

• 311598

Mallory

• 9-60408

OMC Stern Drive

• 311598
• 3852105

Volvo Penta

• 3852105

Additional Details:

• Fits: IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II (s/n 0K999999 & Below) (1964-1997)

Interchanges/Replaces

GLM

• 21520

Mallory

• 9-75123

Mercruiser Stern Drive

• 31-35988A12
• 31-35988A2

Additional Details:

• Fits: Alpha One Gen II (1991 & Newer) and Vazer

Interchanges/Replaces

GLM

• 89180

Mallory

• 9-72704

Mercruiser Stern Drive

• 816431A1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-1728	Mallory 9-73117 Mercruiser Stern Drive 816607	1	Bellow Flange Ring		N/A
9-73116	Mercruiser Stern Drive 54-86049	1	BELLOWS GROUND CLIP		N/A
18-710-72-2	Mercruiser Stern Drive 54-31765 54-815504372	1	Hose Clamp-4-1/16 TO 5		N/A

Interchanges/Replaces

GLM

• 89030

Mallory

• 9-72710

Volvo Penta

• 875826
• 876294

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-710-64		1	Hose Clamp 3 9/16 To 4 1/2		N/A
18-710-80		1	Hose Clamp 4 9/16 To 5 1/2		N/A

Interchanges/Replaces

Volvo Penta

• 834548
• 958313
• 966694

Key Features:

• Measures upper drive gear clearance on MC-I, R-MR, Alpha One and Alpha One/Gen II drive units

Interchanges/Replaces

GLM

• 90170

Mercury Marine

• 91-60523

Key Features:

• Measures upper drive gear clearance on MC-I, R-MR, Alpha One, Alpha One/Gen II drive units

Interchanges/Replaces

GLM

• 90180

Mercury Marine

• 91-60526T

Interchanges/Replaces

GLM

• 22412

OMC Stern Drive

• 909121

Interchanges/Replaces

GLM

• 22410

OMC Stern Drive

• 908086
• 909114
• 909753

Additional Details:

• Fits: Alpha One Gen II (s/n 0D469859-0K999999) with new style 18-3056 impeller

Interchanges/Replaces

GLM

• 11140

Mallory

• 9-78112

Mercruiser Stern Drive

• 45-816919

Interchanges/Replaces

Chrysler/Force/US Marine

• 31-42677A1

GLM

• 22960

Mercury Marine

• 31-42677A1

Additional Details:

• For: Alpha One Gen II

Interchanges/Replaces

Mercruiser Stern Drive

• 53-815949

Key Features:

• Presses bearing cone onto Alpha One/Gen II drive shaft housing pinion gear

Interchanges/Replaces

Mercury Marine

• 91-90774

Additional Details:

• For: Mercury 15-25 2 cyl.

Interchanges/Replaces

Mercury Marine

• 27-43337
• 27-433371
• 27-433372
• 27-433373
• 27-433374
• 27-43337A1
• 27-96286

Interchanges/Replaces

GLM

• 30700

Mercury Marine

• 27-60945
• 27-66102
• 27-661021