Indmar 5.7L Vortec Operator's Manual page 22

Fresh Water Cooling System – If equipped, the heat
exchanger has four drain plugs; two for raw water and
two for coolant. Refer to Chapter 7, Storage and
Winter Lay-up .
Figure 1.2 – Anti Knock Sensor
3. Make sure your battery is fully charged and the cables
are clean and tight.
4. Check engine oil for correct level. Refer to Chapter 6,
Maintenance .
1-2
5. Check transmission oil level for correct level. Refer to
Chapter 6, Maintenance .
6. If your engine is equipped with fresh water cooling,
check the expansion tank for the correct level. Refer
to Chapter 6, Maintenance .
1
7. Inspect engine mounts to make sure they aligned and
tight. Make sure that the propeller shaft coupler bolts
are tight.
IND-A005A
Make sure the engine water intake is not
blocked by the trailer bunk. Blocked or
restricted water flow may damage the engine.
Figure 1.3 – Engine Dipstick Level
Do not mix antifreeze types.
Indmar Marine Engines
INDM-A003