Chris-Craft 2015 21 Carina Owner's Manual page 144

Single Point Drain System Checklist
1. Level boat to ensure complete draining of the system.
2. Remove the air pump from the engine.
3. Ensure that the lever on top of the pump is flush with the handle.
(Horizontal)
4. Install the air pump on the actuator fitting.
5. Pull the lever on the pump up. (Vertical)
6. Pump air into the system until both green indicators extend and
the water drains from both sides of the engine.
7. Most water will drain from the engine in 3-4 minutes, however
some water will remain in the heat exchanger.
8. Leave the system pressurized while the boat is being completed
to allow the remaining water to drain out.
Manual Drain System
1. If the air actuated drain system fails use the blue drain plugs to
drain the engine.
2. It may be necessary to lift, bend or lower hoses to allow all water
to drain.
3. Remove blue drain plugs from front and rear of the fuel cell and
seawater pump.
4. Remove end caps, sealing washers and gaskets from the heat
exchanger.
5. Remove both hoses from the seawater pump.
6. Crank the engine over slightly with the starter motor to purge
any water trapped in the seawater pickup pump.
7. DO NOT ALLOW THE ENGINE TO START
Figure 4-8. Air Pump Installed
Warning: Do not drain anti freeze from
the closed cooling system drain plugs.
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Storage And Commissioning
Figure 4-9.
Air Pump
Figure 4-13
Remove the end caps to manually
drain the system
Figure 4-10. Port Drain
Port Drain
Figure 4-11. Starboard Drain
Starboard
Figure 4-12. See Owner's Manual
Heat
Exchanger
Gasket
Washer
End Cap
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