COLD WEATHER STARTING
The exact temperature where use of a "Thermostart" is necessary varies from engine to engine and also according to
many other variables. In general, if the temperature is below 40F (30 4C) and, upon attempting to start an engine, it
turns over rapidly, exhausts white smoke but does not start, the use of a "Thermostart" is necessary.
TO USE A THERMOSTART -
1.
If the fuel line has a valve, ensure that it is turned to the "on" position.
2.
Move the speed control to the maximum position.
3.
Push and hold the button labeled "Heater" for 15 to 20 seconds. (Note: Some installations employ key start
switches with a "Heater" position).
4.
Engage the starter motor. If the engine does not start in 20 seconds, release the button. After 10 seconds re-
engage the starter motor. If the engine will not start, check to ensure there is fuel at the inlet and 12Vat the electrical
terminal on the "Thermostart". If both are present, remove the air filter housing (or air duct) and visually observe the
device to determine if it glows red when the heater switch is engaged. If not, the device is faulty and must be
replaced. If there is no fuel at the inlet, ensure that all valves between the fuel supply source and the "Thermostart"
are open. If this is not the cause, the next step is to "bleed" the low pressure fuel system. Refer to "bleeding", page
46. If 12V are not available, troubleshoot electrical system.
5.
As soon as the engine starts, release starter switch, adjust the throttle for the lowest smooth running engine rpm and
allow the engine to warm up.
6.
If applicable, close the "Thermostart" fuel supply valve.
INITIAL OPERATING CHECKS
When the engine starts, check:
1.
Oil pressure gauge for sufficient oil pressure.
2.
Alternator ammeter for an indication that the battery is being re-charged.
3.
Sea water coolant discharge for evidence of proper circulation (not applicable to keel cooled engines).
OPERATING PRECAUTIONS
A new Perkins engine can be operated at full load when first used, provided sufficient time Is allowed for the engine to
attain a temperature of at least 140F (60C) before full load is applied. Gradual engine "break-in" is not necessary. In
fact, prolonged engine operation with a light load can be harmful because, under these conditions, the piston rings may
not seat properly within the cylinder liners.
Engine oil pressure and level should be very closely monitored until it has been established that the engine is functioning
normally.
Do not operate the engine at maximum speed for long periods of time. The table on page 33 lists the maximum
intermittent and continuous speeds for each respective engine type. An engine should not be operated at maximum
speed for a period in excess of one hour. After operating at maximum speed, reduce the speed to maximum continuous
rpm* for at least 15 minutes before returning to maximum speed. If an engine is "loaded down" and runs at less than the
maximum speed when at full throttle, the same precaution applies.
*The speed of pleasure craft TV8.510 (M) engines must be reduced 200 rpm for a period of two hours before being
returned to maximum.
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