Gear Set 

Additional Details:

• For: MR/Alpha One/Gen II Lower Gear Housings

Interchanges/Replaces

GLM

• 11312

Mercruiser Stern Drive

• 43-17064A3
• 43-42933A2
• 43-42933A3
• 43-878087A4

Mercury Marine

• 43-828072A2

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-1117	Chrysler/Force/US Marine 31-42647A1 31-F694057 GLM 21610 Johnson/Evinrude Outboard 387817 5007751 Mallory 9-75121 Mercruiser Stern Drive 31-42647 31-42647A1 Mercury Marine 31-42647A1 OMC Stern Drive 387817	1	Pinion Bearing		N/A
18-1143	GLM 21580 Mallory 9-75107 Mercruiser Stern Drive 31-36387A1 Mercury Marine 31-36387A1	1	Tapered Roller Bearing		N/A
18-1155	GLM 21620 Mallory 9-75114 Mercruiser Stern Drive 30-17927 30-35914 30-88957 30-88957A1 30-88957T Mercury Marine 30-17927 30-35914 30-88957 30-88957A1 30-88957T Mercury Race Outboard 30-35914 30-88957 30-88957A1 30-88957T	1	Ball Bearing		N/A
18-1158	Chrysler/Force/US Marine 31-30956 31-F523058 GLM 11410 Honda Outboard 91053-ZW1-003 Johnson/Evinrude Outboard 387247 Mallory 9-75112 Mercruiser Stern Drive 31-30956 31-30956T Mercury Marine 31-30956 31-30956T OMC Stern Drive 387247	1	Carrier Bearing		N/A
18-2285	GLM 23220 Mercruiser Stern Drive 15-35931A1 15-47397A1 Mercury Marine 15-47397A1	1	Shim Set		N/A
18-2294	GLM 23210 Mercruiser Stern Drive 15-42637A1 Mercury Marine 15-42637A1 15-8M0063267	1	Shim Kit		N/A
18-2343	Chrysler/Force/US Marine 12-92721 12-F694186 GLM 32800 Mallory 9-78108 Mercruiser Stern Drive 12-92721 Mercury Marine 12-92721	1	Pinion Nut Washer		N/A
18-3719	Chrysler/Force/US Marine 11-35921 11-826375 11-F694188 GLM 11190 Johnson/Evinrude Outboard 314730 Mallory 9-78103 Mercruiser Stern Drive 11-35921 Mercury Marine 11-35921 11-47411 11-826375 OMC Stern Drive 314730	1	Pinion Nut		N/A
18-2206-1		1	Gear Set		N/A