0285685 EVINRUDE ENGINE COVER Assy, Blue - 130

Illustration 1 g02083414
Bolt Tightening Sequence
Table 1
SPECIFICATIONS FOR 346-0485 Cylinder Head    
Callout     Part Number     Part Name     Specification Description    
-     -     -     Lubricate all bolts with clean engine oil.    
1-26     290-6884     Cylinder Head Fastener     Tighten bolt (1) through bolt (26) in a numerical sequence.
Torque to.........................160 15 N m (118 11 lb ft)
Tighten bolt (1) through bolt (26) again in a numerical sequence.
Torque to.........................
160 15 N m (118 11 lb ft)
Place a mark on bolt (1) through bolt (26) . Rotate bolt (1) through bolt (26) in a numerical sequence
Rotate in a clockwise .....90° (1/4 turn)
Loosen bolt (1) through bolt (26) until the washers are loose under the bolt heads.
Tighten bolt (1) through bolt (26) in a numerical sequence.
Torque to.........................
160 15 N m (118 11 lb ft)
Tighten bolt (1) through bolt (26) again in a numerical sequence.
Torque to.........................
160 15 N m (118 11 lb ft)
Place a mark on bolt (1) through bolt (26) . Rotate bolt (1) through bolt (26) in a numerical sequence
Rotate in a clockwise .....90° (1/4 turn)    
27-32     9X-6000     Bolt     Tighten bolt (1) through bolt (26) in a numerical sequence.
Torque to.........................
28 7 N m ( 21 5 lb ft)    Specifications
Illustration 2 g01623175
Callouts are independent of the Cylinder Head Specifications, Removal Procedure, and Installation Procedure. (1) Inlet valve (2) Exhaust valve
Illustration 3 g01623185
Table 2
SPECIFICATIONS FOR 346-6388 Cylinder Head Group    
Callout     Part Number     Part Name     Specification Description    
3     255-8678     Spring     Length under test force....
47.35 mm (1.864 inch)
Test force.........................
465.0 23.3 N (104.5 5.2 lb)
Approximate free length after test...
77.9 mm (3.07 inch)
Outside diameter..............
29.40 mm (1.157 inch)    
4     255-8677     Spring     Length under test force....
46.15 mm (1.817 inch)
Test force.........................
232.5 11.6 N (52.3 2.6 lb)
Approximate free length after test...
74.60 mm (2.937 inch)
Outside diameter..............
21.00 mm (0.827 inch)    
-     -     -     Before assembly of valve guide, coat the cylinder head bore for valve guide with clean engine oil.
Install the valve guide from the spring side of the cylinder head. Check the inside diameter of the valve guide for distortion after installation into the cylinder head.    
5     255-8665     Valve Guide     Outside diameter..............
13.030 0.008 mm (0.5130 0.0003 inch)
Inside diameter..................
8.072 0.013 mm (0.3178 0.0005 inch)    
-     -     -     After assembly of the valve guide into the cylinder head, install the seal onto the top of the valve guide.
Before assembly of cylinder head valves, coat the valve guide inside diameter with clean engine oil.    
A     -     -     Diameter of valve stem.....
8.000 0.010 mm (0.3150 0.0004 inch)    
B     -     -     Diameter of the valve head
Inlet.....
41.50 0.13 mm (1.634 0.005 inch)
Exhaust.....
37.50 0.13 mm (1.476 0.005 inch)    
C     -     -     Valve face angle
Inlet.....29.50° 0.25°
Exhaust.....44.25° 0.25°    
D     -     -     Depth of the bore in the cylinder head for the valve seat insert
Inlet.....
9.30 0.05 mm (0.366 0.002 inch)
Exhaust.....
10.40 0.05 mm (0.409 0.002 inch)
The valve seat insert must be shrunk by reduced temperature before the valve seat insert is installed in the head.    
E     -     -     Dimensions for the valve seat insert
Diameter of the inlet valve seat insert.....
42.560 0.013 mm (1.6756 0.0005 inch)
Bore in cylinder head for the inlet valve seat insert.....
42.500 0.015 mm (1.6732 0.0006 inch)
Diameter of the exhaust valve seat insert.....
39.060 0.013 mm (1.5378 0.0005 inch)
Bore in cylinder head for the exhaust valve seat insert.....
39.000 0.015 mm (1.5354 0.0006 inch)    Removal Procedure
Start By:
Remove the clean emission module and the support bracket.
Remove the exhaust sensor lines
Remove the exhaust manifold.
Remove the fan drive m