55
Draining the cooling system
Caution!
When temperatures drop below freezing, failure to com-
pletely drain the cooling system will result in serious
damage to the engine and exhaust manifolds. To assure
complete drainage, probe all drain openings with a piece
of wire to remove any blockage.
The following steps are very important in protecting your
engine from damage in freezing conditions. If you are un-
sure of how to perform any of the following steps, see your
Volvo Penta dealer for a complete end-of-season/winteriza-
tion service. Freeze damage to the engine package is not
covered by your Volvo Penta limited warranty.
•
Perform these procedures with the boat out of the wa-
ter. It will prevent damage to cooling system components
if temperatures drop below freezing.
•
When draining the engine, raise or lower the bow of the
boat to position the engine in a level attitude. This will
provide for complete drainage of the block and mani-
folds. If the bow of the boat is higher or lower than the
stern, some water may be trapped in the block.
Engine Flush
Volvo Penta engines incorporate an engine flushing port
designed to flush the engine with fresh water while the en-
gine is running. If flushing the engine with the boat in the
water the engine should not be run higher than idle or sea
water may be drawn in with the fresh water. A water supply
capable of delivering 15 psi (103kPa) and 4 gpm (11lpm) is
required for flushing the engine.
1. If the engine is running, shut it down.
2. Remove the blue plastic plug from the hose that is
clamped to the starboard side of the engine. It is marked
with the running engine flush symbol (1).
3. Connect a water hose from a fresh water source to the
flush connector on the engine (2).
4. Turn water on full and start the engine.
5. Let engine idle until engine temperature stabilizes at its
normal operating range. This will allow the thermostat to
open and ensure the fresh water circulates throughout
the engine.
6. After engine is flushed, shut engine down.
7. Disconnect water hose and reinstall the cap.
Drain the engine if freezing temperatures are expected. See
“
Draining the Cooling System” section found elsewhere in
this manual.
1
2
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