Section 5 - Maintenance
90-8M0070851
eng
AUGUST 2012
Page 71
3. Mark the direction of rotation of the impeller and remove the protective cap from the middle of the impeller.
a -
Seawater pump
b -
Impeller
c -
Protective cap
d -
O‑ring
e -
Cover
f -
Screw (4)
4. Use a suitable puller to remove the impeller from the impeller shaft.
5. Inspect the impeller for damage. The impeller must be replaced if there are any signs of damage.
NOTE: Keep an extra impeller onboard the boat at all times.
6. Lubricate the impeller with silicone spray or glycerine.
7. Push the impeller onto the shaft and press the protective cap into the impeller.
8. Insert a new O‑ring into its groove.
9. Install the cover onto the housing and secure the cover with the four screws. Tighten the screws to the specified torque.
Description
Nm
lb‑in.
lb‑ft
Seawater pump cover screws
4.0
35.4
–
10. Open the seacock.
11. Start the engine and check the cooling system for leaks.
Sterndrive Water Inlets Check
1. Obtain a piece of wire the appropriate size to insert into the water inlets holes.
2. Insert the wire in and out of the sterndrive water inlets to ensure that they are open and to remove debris or marine growth.
Do not scrape the sterndrive paint.
3. Remove the wire from the sterndrive and retain for periodic water inlet checks.
a -
Dual water pickup water inlets
b -
Side pickup water inlets
Flushing and Draining the Seawater System
1. Close the seacock.
2. Open and clean the seawater filter.
3. Fill the seawater filter with fresh water and operate the engine at idle.
IMPORTANT: Keep the seawater filter filled with fresh water while the engine is running.
4. Operate the engine until the water draining from the engine runs clear to ensure that all sludge and salt residues are
flushed away.
5. Switch off the engine.
6. Replace the cover on the seawater filter.
a
b
c
d
e
f
50720
a
b
22495