804176 Mercury SCREW

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Typical example (1) Crankshaft gear (2) Crankshaft (3) Crankshaft thrust washers
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(4) Journal 1 (5) Journal 2 (6) Journal 3 (7) Journal 4 (8) Journal 5 (9) Journal 6 (10) Journal 7
Table 1
Specifications for 346-4747 Crankshaft Gp    
Callout     Part Number     Part Name     Specification Description    
1     338-1402     Crankshaft Gear     Maximum permissible temperature of the gear for installation on the crankshaft is
180 °C (356 °F).    
2     346-4747     Crankshaft     The end play of a new crankshaft is
0.1 to 0.41 mm (0.00394 to 0.01614 inch).    
3     363-0559     Thrust Washer     Standard thickness of thrust washer is
2.69 to 2.75 mm (0.10591 to 0.10827 inch).    
4     -     Journal 1     Mounting    
5     -     Journal 2     Run out of the journal is
0.05 mm (0.0020 inch).    
6     -     Journal 3     Run out of the journal is
0.1 mm (0.0039 inch).    
7     -     Journal 4     Run out of the journal is
0.15 mm (0.0059 inch).    
8     -     Journal 5     Run out of the journal is
0.1 mm (0.0039 inch).    
9     -     Journal 6     Run out of the journal is
0.05 mm (0.0020 inch).    
10     -     Journal 7     Mounting    Refer to Table 1 for the run out of the crankshaft journals.Inspect the crankshaft for wear or for damage. For more information regarding the servicing of the crankshaft, contact the Dealer Solution Network (DSN).Refer to Specifications, "Connecting Rod Bearing Journal" for more information on the connecting rod bearing journals and connecting rod bearings.Refer to Specifications, "Main Bearing Journal" for information on the main bearing journals and for information on the main bearings.Removal Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1U-8221     Lifting Sling     2    Start By:
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump" for the correct procedure.
Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front)" for the correct procedure.
Remove the crankshaft rear seal. Refer to Disassembly and Assembly, "Crankshaft Rear Seal" for the correct procedure.
If necessary, remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head" for the correct procedure.
If necessary, remove the pistons and connecting rods. Refer to Disassembly and Assembly, "Pistons and Connecting Rods" for the correct procedure.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
The engine should be mounted on a suitable stand and placed in the inverted position.
If the cylinder head, the pistons and the connecting rods have not been removed already, remove the connecting rod bearings. Refer to Disassembly and Assembly, "Connecting Rod Bearings" for the correct procedure.
Ensure that the main bearing caps are marked for the location and orientation.
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Remove bolts (3) from tube assembly (2) .
Remove tube assembly (2) from the cylinder block.
Remove gaskets (1) (not shown).
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Remove bolts (4) and main bearing caps (5) from the cylinder block.
Remove lower main bearing shells (6) from main bearing caps (5). Keep the lower m