898103T43 Mercury COVER, Cylinder Head

(1) 9L9190 Spring for valves: Length under test force ... 43.56 mm (1.715 in)Test force ... 155 22 N (35 5 lb)Use again minimum load at length under test force ... 100 N (23 lb)Length of spring at valve open position ... 30.86 mm (1.215 in)Use again minimum load at valve open position ... 660 N (148 lb)Free length after test ... 47.12 mm (1.855 in)Outside diameter ... 36.58 mm (1.440 in)Spring must not be bent more than ... 1.65 mm (.065 in)(1) 1W4259 Spring for valves: Length under test force ... 45.77 mm (1.802 in)Test force ... 216 22 N (49 5 lb)Use again minimum load at length under test force ... 187 N (42 lb)Length of spring at valve open position ... 33.07 mm (1.302 in)Use again minimum load at valve open position ... 735 N (165 lb)Free length after test ... 50.70 mm (1.996 in)Outside diameter ... 39.62 mm (1.560 in)(1) 9N3617 Spring for valves: Length under test force ... 42.04 mm (1.655 in)Test force ... 220 22 N (50 5 lb)Use again minimum load at length under test force ... 191 N (43 lb)Length of spring at valve open position ... 29.64 mm (1.167 in)Use again minimum load at valve open position ... 721 N (162 lb)Free length after test ... 47.12 mm (1.855 in)Outside diameter ... 36.58 mm (1.440 in)Spring must not be bent more than ... 1.65 mm (.065 in)(2) Distance from the end of the valve to the valve spring spacer seat ... 52.40 0.38 mm (2.063 .015 in)(3) Diameter of valve stem: 9L7682 Inlet Valve ... 9.462 0.013 mm (.3725 .0005 in)Use again minimum diameter of the valve stem ... 9.42 mm (.371 in)9L7683 Exhaust Valve (tapered stem):Head end of valve stem ... 9.411 0.013 mm (.3705 .0005 in)Use again minimum diameter of the head end of valve stem ... 9.37 mm (.369 in)Lock end of valve stem ... 9.436 0.013 mm (.3715 .0005 in)Use again minimum diameter of the lock end of valve stem ... 9.408 mm (.3704 in)Bore in the valve guides (inlet and exhaust) ... 9.512 0.013 mm (.3745 .0005 in)Maximum permissible bore in the valve guides (worn): Measure 19.0 mm (.75 in) deep in valve guide bore from both ends of the valve guide ... 9.550 mm (.3760 in)(4) Angle of valve face: Inlet valve ... 30 1/4Exhaust valve ... 45 1/4(5) Diameter of valve head (inlet valve) ... 53.19 0.13 mm (2.094 .005 in) Diameter of valve head (exhaust valve) ... 45.82 0.13 mm (1.804 .005 in)(6) Thickness of valve lip: Inlet valve ... 2.31 mm (.091 in)Use again minimum valve lip thickness ... 1.78 mm (.070 in)Exhaust valve ... 1.60 mm (.063 in)Use again minimum valve lip thickness ... 1.27 mm (.050 in)