Some landing boats are equipped with Hall-Scott gasoline engines. Crew members, therefore, must be familiar with the operating procedure to be followed in using this type of power plant.
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Instructions for Operating the Hall-Scott Gasoline Engine
The outline below gives the steps to follow in checking the engine before starting, procedures when starting and stopping, and some common causes of an overheated motor.
- Daily engine check before starting motor:
- Check sea strainers (sand traps).
- Check batteries.
- Water level should be 3/8 of an inch above battery plates.
- Keep batteries clean and all connections tight.
- Never check batteries with an open flame.
- Check fresh water supply (also extra supply).
- Keep surge tank filled to within one inch from top.
- Check fuel supply and system.
- Turn filters and drains daily.
- Clean intake screens.
- Keep all line connections tight.
- Drain both carburetor bowls.
- Check lubricating oil supply.
- Change oil every 50 operating hours.
- Clean oil filter after every oil change and drain sludge from filter.
- Use 20-40 S.A.E. oil.
- Pump out bilges.
- Open all water cocks.
- Turn down grease cups daily on salt water pumps.
- If engine is new or recently overhauled, jack engine over by hand at least 11/2 turns.
- Keep vacuum line valve closed (this disconnects the clutch and allows acceleration of engine for warming up).
- Turn on blowers five minutes before starting engine to blow gas vapors from bilges.
- Starting Motor.
- Have throttles in neutral and air control valve closed.
- Turn on autopulse and wait a minute until carburetor bowls fill.
- Turn on ignition switches, press starter button. Warm engine to 140 degrees at 600 rpm's. After engine has been warmed up, shut off autopulse.
- If solenoid switch fails, push on the lever on starter motor with tool or by hand to throw gear into position.
- After Motor Starts.
- Sea suction.
- Oil pressure, 45-70 lbs. per square inch.
- Water temperature, 140-160 degrees.
- Oil temperature, 150-180 degrees.
- Stopping Motor.
- Place throttle in neutral and turn off switches.
- Close air valve.
- Close fuel line valves.
- Check engine for repairs.
- Wipe down engine.
- Engine Overheating.
- If engine overheats, shut down immediately and determine cause.
- Never add water until engine has cooled down
- Common causes of overheating.
- Improper supply of seawater or complete loss of sea suction.
- Sea scoop or strainers clogged.
- Sea cock closed.
- Rubber hose collapsed.
- Faulty pump.
- Clogged lines.
- Excessive greasing of salt water pump.
- Water in oil caused by faulty gaskets.
- Air pockets in cooling system.
- Loose water pump belt.
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