Generator Muffler Install Question

[scanzel]

Where is the best place to install the muffler on a generator installation. Is it best in the sound box wrapped in heat wrap or below the floor under the bus ? I only have about 8" of clearance when aired down so the muffler would need to be oval not round looki9ng for info.

[chessie4905]

Ok. My 10kw Power Tech has about 7 feet of flex pipe shaped in a u configuration. It is covered in
thick asbestos wrap. The pipe in the gen. compartment is that long to allow gen. to be slid out for service. Gen sits parallel to coach. The pipe then goes down through floor at an elbow, then another elbow to direct exhaust along bottom of coach. The muffler in picture is about 3 1/2 to 4 inches in diameter. With coach on stops, bags down, there is 7 inches clearance.

[chessie4905]

Here is underneath.

[chessie4905]

It is pretty quiet.

[chessie4905]

Our 4104 used a pretty small inline round muffler or glass pack or resonator. Pipe went diagonal under coach to exit out driver side.

[richard5933]

Ours is oval muffler mounted underneath. Exhaust crosses the bus just in front of the rear axle and exits on the driver side. That location is safer than in the middle of the bus, as the middle is more likely to get crushed going over road humps and such.

[silversport]

I went with a glass pak, when parked and want it real quiet I add two more mufflers.

[TomC]

No such thing as a too quiet generator.

[luvrbus]

I never used a muffler just a longer exhaust pipe and mine was very quite on the Kubota   

[chessie4905]

The exhaust won't be very loud with a minimal muffler. Most of the noise will be from the engine. I was in a tractor supply this evening. They sell small diameter mufflers for tractors.  they have approx 2 feet of pipe on one end and about 8" on other end, depending on size of muffler and pipe diameter. Most smaller mufflers are straight through, packed with fibreglass or asbestos. Id of pipe has many small scallops to catch the sound.