Marquis 420 Sport Coupe Owner's Manual page 113

W S
interization and
Winterizing the System
You must use a nontoxic, non-alcohol, RV-type (pink) antifreeze in your boat's fresh
water system. Using the wrong type of antifreeze can damage the fresh water system.
The repair of such damage is not included under the terms of the Marquis Limited
Warranty.
3837 • U3 10/07
torage
2. Verify DC Power to helm panel.
3. On the DC Panel - Engine Room, make sure the Auto Sump circuit
breaker is ON.
4. Switch the Pressure Water Pump circuit breaker ON DC Panel - Helm.
5. Open all sink and shower faucets on the boat, including the faucets
for the transom hand shower and bow and transom fresh water
washdowns.
6. When there is no more water coming from any of the sink taps, shower
heads, or fresh water washdowns, switch the Pressure Water Pump
circuit breaker OFF.
7. Drain the water heater. Refer to the OEM information for details on
draining the water heater.
1. Pour 20 gallons of nontoxic recreational vehicle antifreeze into your
boat's fresh water tank.
Note:
If the fresh water system loses pressure during this procedure,
you will have to add more antifreeze into the fresh water tank.
2. Close all faucets.
3. Switch the Pressure Water Pump circuit breaker ON.
4. If your boat does not have the optional grey water holding system, place
a large bucket under the grey water and sump discharge fittings. This
catches the antifreeze pumped out in the next step. Refer to Section 9 -
Thru-Hull Fittings for the exact location of this fitting.
5. Open the galley sink cold water faucet. When a steady stream of
antifreeze flows from the tap, close the faucet. Repeat this step for the
galley hot water faucet, then for each cold and hot water faucet on the
boat and the windshield washer, except for the transom hand shower
and bow and transom fresh water washdowns.
For the transom hand shower, place the shower head in a bucket before
turning on the shower faucet. This catches the antifreeze, which can be
reused. Proceed as described earlier in this step.
For the bow and transom fresh water washdowns:
a. Remove the hose(s) from the fresh water washdown fittings.
b. Place a bucket under the washdown fittings to catch the
antifreeze, which can be reused.
c. Open the washdown faucets. When a steady stream of antifreeze
flows from the fittings, close the faucets.
6. Pour one quart of antifreeze into each shower and sink drain.
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