How to make your own small engine mufflers

Written by justin mark
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How to make your own small engine mufflers
(Ablestock.com/AbleStock.com/Getty Images)

Mufflers are used as silencers on internal combustion engines. A muffler is installed near the end of the exhaust system of the engine. The noise caused by the exhaust of the engine is silenced as it travels through a resonating chamber inside the muffler. This resonating chamber is designed to make opposite sound waves cancel each other out. Making a muffler for your small engine is a cost-effective way to lessen its noise. All you need are the right tools and some basic skills at welding.

Skill level:
Moderate

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Things you need

  • An empty disposable 300g argon gas bottle
  • A three-quarter-inch steel pipe
  • A piece of scrap sheet metal
  • Ruler
  • Pliers
  • Steel saw
  • Electric drill
  • Set of drill bits
  • Welding machine
  • Welding helmet
  • Welding electrode

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Instructions

  1. 1

    Cut the three-quarter-inch steel pipe with the steel saw. The pipe should be about an inch longer than the disposable 300g argon gas bottle.

  2. 2

    Cut a piece of scrap sheet metal with the steel saw. It should be big enough to cover one end of the steel pipe.

  3. 3

    Weld the cut piece of sheet metal to cover one of the ends of the steel pipe.

  4. 4

    Drill holes in the steel pipe using the electric drill with a size 4 drill bit. The holes should start from the welded end and should be evenly spaced from each other. Remember to leave at least a 3-inch space from the open end of the steel pipe.

  5. 5

    Unscrew the cap on top of the argon gas bottle, using the pliers to grip the cap.

  6. 6

    Drill a hole on top of the argon gas bottle. The hole should be the same diameter as the steel pipe.

  7. 7

    Drill a hole at the bottom of the argon gas bottle. The hole should be the same diameter as the steel pipe.

  8. 8

    Insert the steel pipe, with the covered end in first, from the bottom of the argon gas bottle. Leave a 3-inch length of the steel pipe exposed at the bottom of the argon gas bottle.

  9. 9

    Weld the steel pipe and the bottom of the argon gas bottle.

  10. 10

    Cut 2.5 inches from the remaining spare steel pipe.

  11. 11

    Weld the 2.5-inch steel pipe on top of the argon gas bottle.

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