MAINTENANCE
80
Tube Ref
No.
Description Where Used Part No.
Kendall GT-1 SAE
20W50
Engine crankcase Obtain Locally
15.Turn on the water supply hose to the water pick‑up.
16.Start the engine and check for proper oil pressure. Allow the
engine to idle for one minute and verify that no oil is leaking.
17.Shut off the engine and the water to the water pick‑up
attachment.
18.Wait a few minutes for the engine oil to return to the crankcase
and then check the oil level. If the oil level is low, add enough
oil to bring it within the "OK RANGE" on the dipstick. Do not
overfill.
19.Remove the external water supply.
CHANGING SUPERCHARGER GEARCASE OIL
IMPORTANT: Change the supercharger oil when the engine and
supercharger are warm from operation. Warm oil flows more
freely, carrying away more impurities. Use only the recommended
oil in the supercharger, see
Specifications.
If the oil level in the
sight‑glass has increased, decreased, or changed to an abnormal
color, there may be an internal problem with the supercharger.
Contact your authorized Mercury Marine dealer.
1. Attach a water hose to the boat's external water pickup, to
allow water to be supplied to the engine block during engine
warm‑up.
2. Open the water tap to supply enough flow to the sea pump so
that suction created by the sea pump, does not collapse the
supply hose.
3. Place the remote control in neutral position and start the
engine. Operate the engine at idle speed, in neutral, until the
engine reaches normal operating temperature.
4. Stop the engine and shut off the water.
5. Remove the fill plug from the top of the supercharger
gearcase.
6. Place a suitable container under the drain plug in the bottom
of the supercharger gearcase.
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