Appendix H
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Instructions for Operating the Hall-Scott Gasoline Engine

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.

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.

  1. Daily engine check before starting motor:

    1. Check sea strainers (sand traps).

    2. Check batteries.

      1. Water level should be 3/8 of an inch above battery plates.

      2. Keep batteries clean and all connections tight.

      3. Never check batteries with an open flame.

    3. Check fresh water supply (also extra supply).

      1. Keep surge tank filled to within one inch from top.

    4. Check fuel supply and system.

      1. Turn filters and drains daily.

      2. Clean intake screens.

      3. Keep all line connections tight.

      4. Drain both carburetor bowls.

    5. Check lubricating oil supply.

      1. Change oil every 50 operating hours.

      2. Clean oil filter after every oil change and drain sludge from filter.

      3. Use 20-40 S.A.E. oil.

    6. Pump out bilges.

    7. Open all water cocks.

    8. Turn down grease cups daily on salt water pumps.

    9. If engine is new or recently overhauled, jack engine over by hand at least 11/2 turns.

    10. Keep vacuum line valve closed (this disconnects the clutch and allows acceleration of engine for warming up).

    11. Turn on blowers five minutes before starting engine to blow gas vapors from bilges.

  2. Starting Motor.

    1. Have throttles in neutral and air control valve closed.

    2. Turn on autopulse and wait a minute until carburetor bowls fill.

    3. 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.

    4. If solenoid switch fails, push on the lever on starter motor with tool or by hand to throw gear into position.

  3. After Motor Starts.

    1. Check:

      1. Sea suction.

      2. Oil pressure, 45-70 lbs. per square inch.

      3. Water temperature, 140-160 degrees.

      4. Oil temperature, 150-180 degrees.

--105--

  1. Stopping Motor.

    1. Place throttle in neutral and turn off switches.

      1. Close air valve.

      2. Close fuel line valves.

    2. Check engine for repairs.

    3. Wipe down engine.

  2. Engine Overheating.

    1. If engine overheats, shut down immediately and determine cause.

      1. Never add water until engine has cooled down

    2. Common causes of overheating.

      1. Improper supply of seawater or complete loss of sea suction.

      2. Sea scoop or strainers clogged.

      3. Sea cock closed.

      4. Rubber hose collapsed.

      5. Faulty pump.

      6. Clogged lines.

      7. Excessive greasing of salt water pump.

      8. Water in oil caused by faulty gaskets.

      9. Air pockets in cooling system.

      10. Loose water pump belt.

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