FIGURES #1 - #2 Provides two separate views of the upper gear housing driven gear being properly shimmed using the Sierra installation tools. FIGURES #3 - #4 FIG. #1 NOTE: Provides the same views of the drive gear being shimmed in the same application. FIG. #3 This installation cannot be performed correctly without the Sierra 18-9856 shim tool. Improper installation will result in gear failure. The .025 referenced in FIG #2 & FIG #4 is achieved when .026 will not fit the clearance but .025 will. A service manual should always be consulted for step-by-step instructions. FIG. #2 FIG. #4 18-2125 YOKE Replaces: 39384, 46020, 460201, 46020T, 4602002, 46020002 Fits all #1/ALPHA Units (S/N 1684188 - OK999999) 18-2146 YOKE Replaces: 20175, 59830A1, 59830A7 Fits all #1, R, MR, Alpha I, Alpha I Gen II, Bravo & Blackhawk 18-6400 YOKE Replaces: 12784, 12784T For: Bravo (OM111207 & below) and Blackhawk 18-2128 18-6401 YOKE ASSEMBLY Replaces: 12784A10, 12784A4 For: Bravo I, II, III (OB664190 - up) (1998-05) 18-9218 YOKE ASSEMBLY Replaces: 814819A2, 59830A5, 59829A1 For all #1, R/MR/ALPHA Gen II OK999999 & Below (1971-97) CENTER SOCKET Replaces: 39383, 39383T, 393831 (Rockwell) Fits IA/IB/IC & EZ, MC-I, R, MR, Alpha One, Gen II (OL949778 & below), Bravo (OM111207 & below), MC II & TS 18-2104 U-JOINT 18-1711 U-JOINT Replaces: 862132, 862132T For: Bravo One, Two, & Three (All Ratios), Bravo One X/ Two X, Three X (All Ratios), Bravo One XR/XZ(All Ratios), Bravo One XR Sportmaster (All Ratios) & Integrated Transom 18-2097 U-JOINT Permalube Replaces: 8055361, 805536A1, 805536A2 For: Generation II F680000 & UP Heavy Duty Replaces: 75832, 75832A2, 75832T, 758321, 75832T1, 75832A1, 75832A3, 58749, 41431, 36312 Includes both straight and 90° grease fitting. Fits all #1 and ALPHA I Units S/N 1684188-B418818. Also TR/TRS and II SSM. 18-2174 U-JOINT Heavy Duty Replaces: 36312, 41431, 58749, 75832, 75832T, 75832A1, 75832A2, 1038 75832A3, 758321, 75832T1 Includes both straight and 90° grease fitting. Fits ALPHA I Units S/N B418819 & above. Also fits ALPHA I SS & BRAVO 18-6406 U-JOINT ASSEMBLY Replaces: 865496A01, 865493A01, 865510T, 865496A01, 865511T GKN new style with external clips. Fits: Alpha I Gen II 0L949779 & UP, Bravo 0M111208 & UP For: Mercruiser Vazer I/O — MERCRUISER - Drive System
