Chris-Craft Launch 22 Owner's Manual download pdf (Page 85)

Systems

Chris-Craft 3–23

Water

Temperature

Gauge

The water temperature gauge indicates the temperature of the coolant mixture circulating inside

the engines cooling circuit. The engine is equipped with a thermostat that controls flow of

coolant within the engine thus maintaining correct operating temperature. Engine coolant

temperature is not affected by seawater temperature.

Correct operating coolant temperature indications for your engine may be found in the engine

manufacturer’s manual. An unusual change in temperature may indicate problems with the raw

water circuit or internal engine problems causing excess heat. Shut down and do not operate an

engine that is indicating coolant temperature in excess of the manufacturer’s maximum

allowable temperature.

Voltmeter

The voltmeter monitors the voltage of the battery and the charging circuit of the engine. Normal

voltage for a fully charged battery with the engines shut down is about 12.8 volts. With the

engines running a charging voltage of 13 to 15 volts should be indicated. Low voltage with the

engines running (less than 12 volts) indicates a possible problem with the charging circuit. The

engines are unlikely to start with less than 12 volts indicated on the volt meters.

Fuel Gauge

The fuel gauge indicates the fuel level in the tanks. Due to the irregular shape of the fuel tanks

and the angle of the tanks when running, indicated fuel level does not correspond directly with

the ratio of remaining fuel to total fuel capacity (i.e. an indicated fuel level of 1/2 does not

indicate 1/2 the capacity of the tank is remaining, but indicates the level of the fuel is 1/2 the

height of the tank at the sender). Remember, not all fuel capacity is usable capacity. Careful

planning of long trips using a safety reserve is advised. It is always prudent to fill the tanks

completely after each use to prevent condensation within the tanks.

Engine Hour

Meter

The engine hour meter is actually located on the engine itself and indicates the total cumulative

time in hours of operation. The engine hours should be noted on the engine log for all oil

changes, filter changes, scheduled and unscheduled maintenance. An accurate and carefully

maintained engine log is a valuable tool when diagnosing problems, when seeking warranty

compensation from the engine manufacturer and when your boat is re-sold.

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Chris-Craft Launch 22 Owner's Manual Page 85