2. Remove the four screws on the front side of the seawater pump and remove the cover. Discard the O‑ring.
Seawater pump cover screws
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.
Section 4 - Maintenance
90-8M0145546 eng MAY 2018 Page 61
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