Jet Valve Adjustment
NOTE:
Incorrect jet valve clearance will adversely affect emission levels. Adjust jet valve clearance before adjusting intake valve clearance.
- Before adjusting jet valve, retighten cylinder head bolts with engine cold. See CYLINDER HEAD TORQUE SPECIFICATIONS table. Adjust jet valve clearance with intake valve adjusting screw fully loosened.
- With engine at normal operating temperature, stop engine, remove rocker cover and position appropriate piston at TDC of compression stroke.NOTE: Tensile strength of jet valve spring is weak. DO NOT force screw to turn as this will put excess pressure on spring.
- If out of specification, loosen lock nut and adjust clearance using a feeler gauge. See Fig 2 . Turn adjusting screw so clearance is .010" (.25 mm).
JET VALVE CLEARANCE
| Application | In. (mm) |
|---|---|
| Hot Engine | .010 (.25) |