Losed I Nboard J Et E Ngines - Marine Power 5.3 GEN V DI Owner's Manual

9.
Winterization
LT4 Water Flow Full Closed Inboard Jet Engines
Orange represents coolant flow
Test antifreeze-water concentration to assure adequate protection
Green represents raw water flow
for your location.
These engines are designed to be self-draining, however, it is
recommended that the heat exchanger ends be inspected for de-
bris and trapped water frequently.
6.2 Jetpac
For best results use a Vacuum Cooling System Filler when
refilling or bleeding engine coolant.
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