Engine Rooms The two main engines are Yanmar 6LYA STP rated at 350hp at 3300 rpm. They are continuously rated at 290hp at 3100 rpm and she will cruise at 24 knots at this speed. Maintenance is as per the service manual. Workshop manual is attached. The stbd engine drives a high capacity bilge pump. The port engine heats the hot water calorifier. Oil capacity is 20l for each engine. Starting The engines do not need pre heat in QLD. Starting batteries are located in locker aft of stbd engine. VSR s, in this locker, allow them to charge but not discharge. Three switches on the VSR s allow isolation of each engine and both batteries to be switched to one engine if required. Exhaust exits below water but visible water flow is provided aft. Always check flow after starting engines. Cooling system Each engine has the following sea water cooled manifolds: main heat exchanger; main oil cooler; after cooler and gear box oil cooler. It is important to maintain good flow through all of these and ensure they do not become encrusted with barnacles. I do the following for the main engines and generator when she is likely to remain in her berth for any length of time:- Turn off engine inlet sea cock. Remove cover of inlet strainer. Clean strainer Place fresh water hose in strainer Run engine at tickover for 5 minutes This lets the engines sit in freshwater until next needed. The engines are shaft drive through bronze stuffing boxes. A grease nipple provides lubrication and a lip seal at the inboard end stops any drips. Should the lips seal wear or fail it is of no great matter. Fuel System Each engine has 2 fuel tanks. Forward tank holds 300 litres and the main aft tank 600 litres giving 1800 litres in total. Together the four tanks give a range of about 600 nm. The tanks are switched from the engine rooms, handles vertical switch the two main fuel tanks in line. Horizontal switches the two smaller tanks in line. The return lines can be switched in the main cabin. Primary engine fuel filter is Donaldson P550040
Electrical Systems Shore Power The shore power input box in the cockpit will check that the shore supply is the correct polarity. The circuit breaker in this box controls the power into the vessel. The fail proof switch on the 24v Main control panel will ensure the shore power and generator power cannot be on together. Generator A 9 kva Kholer generator provides power away from the dock. The start switch is on the 240v control panel. A quick push and release to start and the same to stop. Do not hold the start switch down. Power usage can be monitored on the main 240v control panel. The lower of the three panels. Switch between volts and amps. 4 amps at 240v is approximately 1kw and the generator can deliver 9kw. For example: Freezer 4 amps Microwave 4 Water heater 6 Kettle 8 Battery charger 2 Water maker 7 Total 31 amp. That is approximately 8 kw 12 v System This comprises the deep cycle house batteries, 2 heavy duty main engine start batteries and the generator start battery. See also Bilge pump system for details of the 12V bilge pumps. The two upper switch panels control the 12v system and most simply switch the power to the fly bridge. So for example to switch on the anchor light you need it switched on at the main panel and on at the fly bridge. If say you leave it switched on at the flybridge then you can switch it on and off in the cabin. The anchor winch has its own protective overload switch on the main panel as does the 12v system. Two smaller overload switches protect each of the two main circuits within the system. 320 amp hours of AGM deep discharge batteries provide the house supply and a 200w solar panel on the flybridge roof keeps these topped up.
Watermaker Operation Before starting check The seawater inlet is turned on The product water is directed in to the basin for tasting. The salt water from the water maker is directed overboard High pressure valve on top of membrane is fully released. The handle over the port basin sends product water either to the tank or to the basin. Start with product water to the basin so you can taste it- (Handle horizontal) The handle in the locker aft of basin sends the waste sea water either overboard or inboard for cleaning. Start with water overboard- (Handle Horizontal.) The handle in the electric room takes water either from the sea water feed pump or freshwater from a container. If making freshwater from the sea this handle points down. 1 2 3 4 5 Turn on the seawater feed pump at the main 12V switch panel. Check that the low pressure gauge over the basin now registers about 30 psi. On control panel by saloon door you can now press run and the high pressure CAT pump will start. A lot more water will now flow overboard but the low pressure gauge should still register 25-30 psi Turn the high pressure valve on the membrane clockwise and watch the high pressure gauge rise. At about 400 psi pause and wait for product water to start from tap over the basin. Increase pressure to about 700 psi and taste. If all is well turn the handle over basin to point down and so send product water to tank. Stopping Turn handle over basin back to horizontal and so send the product water to basin. Slowly release the high pressure valve until high pressure gauge reads zero. Allow sea water to flush system for a few minutes and then turn off high pressure pump at panel near door. Finally turn off low pressure pump at main electric panel. Recirculating (Laying up the water maker) In the locker aft of the basin point the handle on the valve down. Waste water will now be directed inboard through the hose. Put end of that hose in a bucket. The valve in electric room will enable the high pressure pump to take water from that bucket. Put end of hose in same container and point handle up. Fill bucket with freshwater or pickling solution. Switch feed pump off at switch in electric room. Fully release high pressure valve. Start high pressure pump and freshwater will circulate through the system. When finished ALWAYS LEAVE SEAWATER DISCHARGE OVERBOARD. HANDLE HORIZONTAL.
Watermaker Care The system is pretty bullet proof but things to note: Every year or if the low pressure guauge reading begins to fall significantly replace first stage filter elements. Do not allow the high pressure to exceed 800 psi. There is no high pressure protection and 700-750psi produces plenty of sweet water. Maintain the CAT high pressure pump. It has a small oil reservior so check oil level and change the oil every 2 years. The CAT pump has ceramic pistons. These can crack if run dry suddenly followed by an inrush of cold sea water. Make sure you have a reading on the low pressure guauge before starting CAT pump. This proves that water is flowing through the CAT pump.
Bilge Pump System Engine Driven System The starboard main engine drives a high capacity electro magnetic clutch bronze pump. Switch on at main electric panel and operate from fly bridge. The starboard locker marked Bilge Valve System will switch this pump to any of the compartments within the vessel. It will also switch it to seawater intake to provide a powerful deck wash hose. Each inlet has a large stainless steel filter identical to the main engine inlet filters. This system is pretty bullet proof and should a problem ever occur this would be the best bilge pump to use. Manual System A manual bilge pump can be switched into the above system in the event of starboard engine failure and hence loss of engine driven bilge pump. Electric Pump system Separate to the above all the water tight compartments within the vessel have one electric bilge pump while the engine compartments have two electric bilge pumps, one pump higher than the other. The system consists of three circuits: Electric room, Port circuit and Starboard Circuit. The Port and Starboard circuits are powered from the Engine Batteries through Voltage Sensitive Relays. The power to this system is switched on and off from VSR s in the engine battery compartment. This system is controlled at the flybridge via port side switch panel. The lights on this panel will indicate if water ingress into a compartment has triggered an automatic bilge pump. A siren will also sound if any of the bilge pumps in the engine/ generator compartments have been triggered. Pushing any of the switches up from Auto to Manual will start the bilge pump in that compartment. Two green LED s indicate that power is being supplied to the system. Starboard 1 Starboard 2 Starboard 3 Port 1 Port 2 Port 3 Starboard engine first bilge pump Starboard engine second bilge pump plus siren Starboard aft storage Port engine first bilge pump Port engine second bilge pump plus siren Generator compartment plus siren The Electric Room has a similar system complete with siren operated from the main electric switch panel.
Air con and freezer Operation The Davy pump in the electric room provides the cooling water for both the freezer and the air con. Switch this pump on at the main 240V control board before starting either unit. The switch can be left on as the Dometic relay unit in the electric room will not start the Davy pump until it is required. Just check you can hear cooling water being pumped overboard. Freezer The large freezer under the floor was designed for freezing fish catch. Simply switch on the at the 240v switch panel and the freezer compressor will start to cool the two very large eutectic plates in the freezer box. We use this mainly as a large capacity refrigerator for vegetables. As a refrigerator one to two hours running a day is sufficient in the tropics. Reverse cycle air con Switch on at the 240v switch panel and again cooling water will flow overboard. The control panel for the Webasto 15,000 btu unit will light up. There is a remote that allows the unit to be operated from port fwd berth.. Although the air con will only draw about 2 kva to run it will take about 6 kva to start. This starting current is a big problem for generators and it is best not to have too much else running when the air con starts up. The control unit will start to cycle the air con off and on once the desired temperature has been reached. If too many other power hungry appliances have been switched on there may not be enough power to restart the air con.there is no problem if running off shore supply. Hot Water Heater The hot water tank is a twin coil system. The water in the hot water tank is static and heated by both a coil run from the port main engine and a 1.5kw immersion heater. The hot water to the sinks and shower is heated by a second coil run through this static hot water. If the hot water tank is drained at any time it is important to fill it before attempting to operate. Use the relief valve until water runs out of the overflow to fill the tank. The immersion heater element will burn out quickly if switched on when there is no water in the tank..
Steering System Hydraulic system with a hydraulic ram for each rudder. The autopilot pump is located under consul in flybridge. The system uses a liquid tie bar to move both rudders in unison. It works as follows: Cylinder 1 Cylinder 2 Steering pump Valve. When valve is closed output from one cylinder is the input of the other cylinder and they move together. When open the output from the first cylinder can flow back to pump and the second cylinder will move freely for alignment.
Instrumentation Raymarine C125 12 multifuction display (MFD) with Navionics charts of Aust and NZ Raymarine Quantum Radar TMQ AP4 Commercial Autopilot Furuno FCV 292 45w Colour Fishfinder NASA wind speed and direction TMQ ecompass giving stabilised gyro output at 10hz for MARPA The MFD provides autopilot control to waypoints and routes through NMEA The gyro e compass provides magnetic heading to MFD through NMEA The fishfinder provides depth to MFD through NMEA The Gyro compass provides rapid course data to allow the radar to show MARPA targets, true velocity, north up etc. The little NMEA Connections are necessary for the above and to get for example true wind speed and true wind direction. They are as follows: TMQ Autopilot MFD NMEA Line 1 Pin 1 Red wire Rx + Nav data Tx+ yellow wire Pin 2 Blue wire Rx - Nav data Tx- brown wire Pin 3 Tx + Magnetic heading Rx+ white wire Pin 4 Tx- Magnetic heading Rx- green wire Furuno MFD NMEA Line 2 Pin 1 white wire Tx+ Depth Rx+ orange/white wire Pin 2 black wire Tx- Depth Rx- orange/green Pin 3 yellow wirerx+ Nav data Tx+ yellow wire Pin 4 greenwire Rx- Nav data Tx- brown wire TMQ ECompass Nasa Wind Blue Power neg and Tx- Tx+ blue wire Red Power pos Yellow Tx+ Tx- screen