Positive Crankcase Ventilation Valve (Pcv); Changing; Positive Crankcase Ventilation Valve; (Pcv) - MerCruiser Tow Sports 5.7 MPI User Manual

3. Remove the flame arrestor.
b
c
d
e
f
4. Clean the flame arrestor with warm water and a mild detergent.
5. Inspect the flame arrestor for holes, cracks or deterioration. Replace if necessary.
6. Allow the flame arrestor to air dry completely before use.
7. Clean the crankcase ventilation hose with warm water and a mild detergent. Dry with
compressed air or allow to air dry completely.
8. Inspect the crankcase ventilation hose for cracks or deterioration. Replace if necessary.
9. Install the flame arrestor and flame arrestor bracket. Torque the flame arrestor bracket
nuts.
Description
Flame arrestor bracket nut
10. Connect the crankcase ventilation hose to the fitting on the flame arrestor and valve
cover.
11. Install the engine cover.

Positive Crankcase Ventilation Valve (PCV)

CHANGING

IMPORTANT: Use only Mercury MerCruiser replacement parts to ensure compliance with
emission regulations.
90-865253073 DECEMBER 2007
a
a - Engine cover knob
b - Engine cover
c - Nuts, flame arrestor
Section 5 - Maintenance
d - Cover mount bracket
e - Flame arrestor
f - Crankcase ventilation hose
Nm lb‑in.
12 106
33327
lb‑ft
–
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