70981A 3 Mercruiser EXHAUST BELLOWS

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01141238
Remove the bolts, the retainers, and retaining ring (2) that fastens tube (1) to the elbow on auxiliary water pump (8).
Remove the bolts, the retainers, and retaining ring (4) that fastens tube (5) to the thermostatic control valve group (9).
Remove bolts (6) that fasten thermostatic control valve group (9) to bracket (10).
The weight of thermostatic control valve group (9) is approximately 28 kg (62 lb). Use a suitable lifting device to remove thermostatic control valve group (9). Remove bolts (3) that fasten thermostatic control valve group (9) to auxiliary water pump (8). Remove thermostatic control valve group (9).
Auxiliary water pump (8) must be removed with the accessory drive shaft and the accessory drive gear as a unit. The weight of auxiliary water pump (8), the accessory drive shaft, and the accessory drive gear is approximately 48 kg (106 lb). Use a suitable lifting device to remove auxiliary water pump (8), the accessory drive shaft, and the accessory drive gear. Remove bolts (7) that fasten auxiliary water pump (8) to the front drive housing. Remove auxiliary water pump (8), the accessory drive shaft, and the accessory drive gear as a unit.
Illustration 2 g01141236
Remove bolts (11) that fasten accessory drive gear (12) to accessory drive shaft (13).
Illustration 3 g01141237
Remove bolts (14) and thrust washers (15) that secure accessory drive shaft (13) to auxiliary water pump (8). Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Water pumps may leak as a result of damaged face seals. Relative movement between the shaft and the housing may allow the drive shaft to contact the face seal in the water pump. If contact occurs, the face seal will be damaged, and early hour failures can result.
Note: Do not lift the auxiliary water pump by the shaft. Do not bump the shaft when installing the auxiliary water pump onto the engine.
Illustration 4 g01009132
Slide accessory drive shaft (13) on the shaft of auxiliary water pump (8). Position thrust washers (15) on the auxiliary water pump and install bolts (14).
Illustration 5 g01009118
Position accessory drive gear (12) on accessory drive shaft (13). Install bolts (11).
Illustration 6 g01009100
The weight of auxiliary water pump (8), the accessory drive shaft, and the accessory drive gear is approximately 48 kg (106 lb). Use a suitable lifting device to install the components in the front drive housing. Install bolts (7).
The weight of thermostatic control valve group (9) is approximately 28 kg (62 lb). Use a suitable lifting device to position thermostatic control valve group (9). Install bolts (3). Install bolts (6) in order to fasten thermostatic control valve group (9) to bracket (10).
Install the O-ring seal on tube (1) and install tube (1) in the elbow on auxiliary water pump (8). Install retaining ring (2), the retainers, and the bolts to secure tube (1).
Install the O-ring seal on tube (5) and install tube (5) in thermostatic control valve group (9). Install retaining ring (4), the retainers, and the bolts to secure tube (5).