Stern drive exhaust / U-joint bellow kits Bushings, shift arms, gaskets, oil seals and clamps Bell housing gasket and o-ring kits Water hoses, clamps and o-rings Mercruiser Alpha one stern drive transom service kits Mercruiser Alpha One bell housing layout Click below for larger picture Ref. # Item description   21951 Mercruiser transom service kit s A  # 21951 Alpha one serial number 6225577 and up for units 1983 thru 1990 with straight exhaust bellow transom service kit 89050 U-Joint bellow 89150 exhaust tube 89080 shift bellow 39622 gasket kit 21900 gimbal bearing 47110 water hose 3/4" 47120 water hose 5/8"    $157.98 21950 Alpha One transom service kit B # 21950 Alpha One outdrives serial number # 6225577 and up transom service kit with exhaust bellow 1983 thru 1990 89050 u-joint bellow 89100 exhaust bellow 89080 shift bellow 39622 gasket kit 21900 water hose 47110 gimbal bearing 3/4" 47120 water hose 5/8"    $134.98 89050 U Joint Bellow 1 # 89050 U-Joint bellow kit for R / MR OEM # 60932A4    $47.98 89180 u-joint bellow 1A # 89180 U-joint bellow for Alpha Generation 2 with clamps OEM # 816431A1    $69.98 89100 Mercruiser Exhaust Bellow 2 # 89100 Exhaust bellow kit OEM # 18654A1    $28.98 21140 shift arm 3 #21140 Shift arm OEM# 45518A3    $20.98 21750 set screw 4 #21750 Set screw OEM# 10-45590   $4.98 30040 gasket 5 #30040 Gasket (3 units) OEM# 12-39116   $4.98 87561 bushing seal kit 6A #87561 Bushing kit for R / MR / Alpha One Generation ll serial # F094774 and bellow OEM# 23-805041A2   $27.98 87562 shift shaft bushing 6B #87562 Bushing kit for Alpha One Generation ll serial # F094775 and up OEM# 23-806036A1   $11.98 85581 oil seal 7 #85581 Oil seal OEM# 26-816464-1   $4.98 21420 upper shift shaft 8 #21420 Upper shift shaft OEM# 45589A3   $40.98 21421 intermediate shift shaft 9 #21421 Inter.shift shaft OEM# 62104-1   $34.98 21422 washer 10 #21422 Washer OEM# 12-32666   $4.98 22100 cotter pins 11 #22100 Cotter pin (10 units) OEM# 18-32665   $19.98   12A #89181 </