Often asked: Which Of The Following Is True Of A Carburetor Backfire Flame Arrestor?

What is required to have a back flame arrestor?

Backfire flame arrestors are mandatory on motorboats fueled with gasoline (except those with outboard engines), and should be U.S. Coast Guard approved. The Society of American Engineers and/or United Laboratories must also approve a backfire flame arrestor.

When should backfire flame arrestors be inspected?

This device is designed to stop the flames that could potentially result from an engine backfire from coming into contact with fuel and starting a fire. A monthly inspection of your backfire arrestor should be performed to ensure that it remains damage-free and that it is still tightly fastened to the carburetor.

Which is an acceptable means of backfire flame control?

(b) The following are acceptable means of backfire flame control for gasoline engines: (1) A backfire flame arrestor complying with SAE J-1928 or UL 1111 and marked accordingly. The flame arrestor shall be suitably secured to the air intake with a flame tight connection.

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Why do boats backfire?

Backfiring Is A Result Of A Lean Condition. It Can Be Caused By Vacuum Leaks Or Incorrect Carb Settings. Turning Idle Mixture Screws In Will Close Off Fuel And Make Idle Leaner. Midrange And Up Are Not Controlled By Idle Screws.

How does a backfire flame arrestor work?

As the name suggests, the purpose of a boat backfire flame arrestor is to stop flames, which can result from an engine backfiring, from coming into contact with other fuel and starting a fire on board your boat. To do this important job, the backfire flame arrestor needs to be in good condition.

How often should flame arrestors be checked?

Guidance on Inspection Intervals A first inspection 3 months following commissioning. An annual inspection is recommended as a minimum even for “clean” processes. An inspection if there is any evidence of an explosion.

What is a backfire flame control?

Backfire flame control devices are designed to prevent open flame from leaving the carburetion system in the event of a backfire. Vessels equipped with gasoline engines, except outboard motors, must have one of the following backfire flame control devices installed on the engine.

Under which of the following conditions is a Type B 1 fire extinguisher required?

All vessels, including PWC, are required to have a Type B USCG–approved fire extinguisher on board if one or more of the following conditions exist: Closed compartments under seats where portable fuel tanks may be stored. Closed storage compartments in which flammable or combustible materials may be stored.

What does a red and green light indicate when seen together at night?

Navigation lights help you and other boaters determine which is the give-way vessel when encountering each other at night. The red light indicates a vessel’s port (left) side; the green indicates a vessel’s starboard (right) side.

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What must you do when anchoring at night?

How to Anchor at Night

  1. Take full stock. Keep track of the tide, wind, traffic, and changing conditions.
  2. Post someone on watch. Supervision is necessary because, even with an anchor, the conditions can and will change.
  3. Check in regularly.
  4. Keep your lights on.
  5. Know the rules.

Why must you operate the exhaust blower?

If your boat is equipped with a power ventilation system (exhaust blower), turn it on for at least four minutes before starting your engine. This will help eliminate fuel vapors in the bilge. Before starting the engine, sniff the bilge and engine compartment for fuel vapors.

What happens when a boat backfires?

Backfiring is a very dangerous condition that can cause a fire and/or more engine damage. Don’t keep running the engine if it keeps backfiring. Boats can explode. Moving parts can rip off your fingers.

What boat requires a backfire flame arrestor?

Because boat engines may backfire, all powerboats (except outboards) that are fueled with gasoline must have an approved backfire flame arrestor on each carburetor. Backfire flame arrestors are designed to prevent the ignition of gasoline vapors in case the engine backfires.

What do two short blasts of a horn mean?

Two short blasts tell other boaters “I intend to pass you on my right (starboard) side.” Three short blasts tell other boaters “I am backing up (operating astern propulsion).”

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