MerCruiser Tow Sports 5.7 MPI, User Manual

Page: 69 / 102

Section 5 - Maintenance
90-865253073 DECEMBER 2007 Page 61
3. Remove the flame arrestor.
a
b
c
d
e
f
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a - Engine cover knob
b - Engine cover
c - Nuts, flame arrestor
d - Cover mount bracket
e - Flame arrestor
f - Crankcase ventilation hose
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 Nm lb‑in. lb‑ft
Flame arrestor bracket nut 12 106 –
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.