Description 6.2 Liter (377 cid)
Seat angle
Intake and exhaust
46°
Top correction cut angle 30°
Bottom correction cut angle 60°
Width
Intake 1.016–1.651 mm (0.040–0.065 in.)
Exhaust 1.65–2.489 mm (0.065–0.098 in.)
2. Measure the valve seat concentricity.
3. Recondition the seat if the measured value exceeds the specified limit.
Measuring valve seat concentricity
Description 6.2 Liter (377 cid)
Runout
Intake
0.05 mm (0.002 in.) maximum
Exhaust
Cylinder Head Reassembly
IMPORTANT: Install each valve in the port from which it was removed or for which it has been fitted.
1. Assemble a valve into its proper port and valve guide. Apply clean engine oil to the valve stem.
Tube Ref No.
Description Where Used Part No.
136
Lubriplate SPO 255 Valve stem Obtain Locally
2. Select the appropriate valve stem oil seal.
3. Coat the outside surface of the valve stem bore and all surfaces of the valve stem oil seal with clean engine oil.
Tube Ref No.
Description Where Used Part No.
136
Lubriplate SPO 255
Outside surface of valve stem bore and all surfaces of the
valve stem oil seal
Obtain Locally
4. Assemble the valve stem oil seal onto the valve stem and slide down until it contacts the valve spring seat.
Engine Inspection and Assembly
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 3B-49
To Next Page
Loading...
Need help?
General