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Mercury Model 850 (4 CYL.) 1973-1977

 
Key Part Number Description Qty Req Comments Price Qty on Hand  
1 5997A3 CYLINDER BLOCK AND CRANKCASE ASSEMBLY
2 53650 GASKET, CRANKCASE TO CYLINDER BLOCK 2
3 56029 COVER, STARTER MOTOR (UPPER)
4 31984 SCREW, COVER TO CRANKCASE (1 3/8")
4 35385 SCREW, COVER TO CRANKCASE (1 3/4")
5 26993 LOCKWASHER, COVER SCREW 4
6 76867 COVER, STARTER MOTOR (LOWER)
7 39767 SCREW, COVER TO CRANKCASE (1 7/8")
7 73658 SCREW, COVER TO CRANKCASE (5 1/2")
8 64281 STUD, CRANKCASE TO DRIVE SHAFT HOUSING (1 7/8") 2
9 20033 PIN, DOWEL - CRANKCASE TO CYLINDER BLOCK 2
10 63779 PIN, DOWEL - CYLINDER BLOCK TO MAIN BEARING 2
11 66517 RESTRICTOR, CRANKCASE BLEED 3
12 64282 STUD, CYLINDER BLOCK TO EXHAUST EXTENSION PLATE (4") 6
13 57841 SCREW, CRANKCASE TO CYLINDER BLOCK (2 3/4") 2
13 53016 SCREW, CRANKCASE TO CYLINDER BLOCK (1 1/4") 2
14 73657 SCREW, CRANKCASE TO CYLINDER BLOCK (1 1/2") 15
15 20359 SCREW, CENTER MAIN BEARING LOCKING (1")
16 20091 TAB WASHER, BEARING LOCKING SCREW
17 65350A2 CHECK VALVE ASSEMBLY, BLEED HOSE - TOP
18 56011A2 CHECK VALVE ASSEMBLY
24 54936 HOSE, BALANCE (5")
20 65670A1 CHECK VALVE ASSEMBLY, BLEED HOSE - BOTTOM
21 20781 ELBOW, BALANCE HOSE TO CYLINDER BLOCK - UPPER
22 34395A1 HOSE ASSEMBLY, BALANCE (6 1/4")
23 65348 TEE, BALANCE HOSE TO CYLINDER BLOCK - LOWER
25 65857 FITTING, AIR INLET COVER