Owner`s manual

3100 OFFSHORE
116
14.2 Winterizing
Fresh Water System
The entire fresh water system must be completely drained. Disconnect all hoses, check valves, etc. and blow
all the water from the system. Make sure the water heater and fresh water tank are completely drained. Use
only very low air pressure when doing this to prevent possible system damage. Because of the check valve
mechanism built in the pump, blowing the lines will not remove the water from the fresh water pump. Remove
the inlet and outlet hoses on the pump. Turn the pump on and allow it to pump out any remaining water....about
a cupful. A recommended alternative to the above-mentioned procedure is the use of commercially available
nontoxic, fresh water system antifreeze. After draining the potable water tank, lines and water heater, pour
the antifreeze mixture into the fresh water tank, prime and operate the pump until the mixture flows from all
fresh water faucets. Be sure to open all hot and cold water faucets, including the fresh water shower in the
cockpit and the faucet in the entertainment center. Make sure antifreeze has flowed through all of the fresh
water drains.
The shower/cabin drain sump system must be properly winterized. Clean debris from the drain and sump and
flush for several minutes with fresh clean water. After the system is clean, pump the drain sump as dry as
possible. Then pour a potable water antifreeze mixture into the shower drain until antifreeze has been pumped
through the entire system and out of the thru-hull.
For additional information refer to the Fresh Water System chapter.
Raw Water System
Completely drain the raw water systems. Disconnect all hoses and blow the water from the system. Use only
very low air pressure when doing this to prevent possible system damage. Because of the check valve
mechanism built in the raw water washdown and livewell pumps, blowing the lines will not remove the water
from that raw water pump. Remove the outlet hose on the pump. Turn the pump on and allow it to pump
out any remaining water....about a cupful. A recommended alternative to the above-mentioned procedure is
the use of commercially available nontoxic, potable water system antifreeze. If potable water antifreeze is
used, pour the mixture into a pail and put the raw water intake lines into the solution. Run the pumps one
at a time until the antifreeze solution is visible at all raw water faucets, discharge fittings and drains. Be sure
antifreeze has flowed through all of the raw water drains.
Engine and Generator Raw Water Systems
Drain all of the sea strainers, heat exchangers and raw water supply and discharge lines for the engine and
optional generator raw water supply pumps. Make sure all sea water has drained from the exhaust system.
Some, but not all, engine mufflers could have a drain plug that must be removed to properly drain the muffler.
Once this is accomplished, pour a nontoxic marine engine antifreeze mixture into a large pail and put the engine
raw water intake lines into the solution. Run the engines one at a time until the antifreeze solution is visible
at the transom exhaust port, then shut the engine off.
Properly winterize the engines and fuel system by following the engine manufacturer’s winterizing
procedures located in your engine owner’s manuals or contact a Pursuit dealer.
Refer to the Raw Water System chapter for additional information on the raw water system.
Marine Toilet
The marine toilet must be properly winterized by following the manufacturer’s winterizing instructions in the
marine toilet owner’s manual. Drain the intake and discharge hoses completely using low air pressure if
necessary. The head holding tank and macerator discharge pump must be pumped dry and one gallon of