[ms3224a]

It's normal. Water is a byproduct of combustion.

If you want to, drill a hole in the lowest part of the muffler.

 

[Carbuff2]

If you want to, drill a hole in the lowest part of the muffler.

A SMALL hole.

 

[williamsji]

Roughly speaking... burning a gallon of gas will produce around a gallon of water as byproduct.

In terms of chemistry: one gallon of gasoline produces about 217.5 moles of water. Each mole of water has a weight of 18 grams. So the burning of one gallon of gasoline produces 3,914.6 grams of water. This is equal to 8.6 pounds of water, which has a volume of 1.033 gallons.

 

[Wildcat]

A SMALL hole.

...sheepishly puts away the 3-inch hole saw...