Sawmill engine mod

[Chuck White]

Got my exhaust system replaced a couple weeks ago.

Sounds pretty good, of course it's a little loud because the mill is inside.

A replacement muffler was just to expensive.

We cut the pipes off about 2-3 inches above the flange and welded a 1-inch pipe coupler onto the pipe, then screwed the muffler into the coupler and installed the flapper!

Front View


Rear View


Close-Up

[beenthere]

Chuck
Curious about the horizontal "wall" covering in the background. What might it be?

[Chuck White]

Been there;  Thanks for the question!

That wall covering in the background is a 1x4x8 board from each species of wood that I have sawed with my mill.

[Mark K]

I did a similar mod to mine. Mine has the Onan 18 on it. I used two 90 degree pipe fittings and pointed my mufflers away from me. I used a little bit bigger mufflers that they use on a lawn mower. Had to build a small bracket on the back of the motor to support them. Yours looks alot simpler. Sure beats the price of the OEM one!

[Chuck White]

Thanks Mark!

I can also just unscrew the mufflers and put in a close nipple then a 45° elbow pointing to the rear, eliminating any more welding!  ;)

For now, I think it just looks cool! ;D

A direct replacement for the Onan lists for $297.00!

[hamish]

Chuck,

You may want to add a larger exhaust, it will help lower engine temps and noise levels.  Those little cans are restrictive and loud.  An automotive muffler will make a huge difference, and I wont be hearing your mill up here in Canada!

[dgdrls]

I suspected you were starting to "stir" from your "North Country" slumber.  Was up there for work on a day trip last week
Ice is out on the larger ponds and lakes , time to get cracking!! :D

Best DGDrls

[bandmiller2]

I make all my tractor and small engine mufflers.When I had the two cylinder Wisconsin on the band mill it was a little loud, welded up a resonater to put after the muffler.If you can get scraps of truck exhaust pipe and can gas weld your golden.The basic principal is pipe from engine with holes drilled into a larger shell pipe out with holes and ends of shell welded.If a muffler is heavy support it so it won't damage the manifold.Frank C.

[bandmiller2]

Good job Chuck,loud engine noise is tiring after running a wile.Hard surfaces in a mill building also reflect noise.Even something as simple as hanging an old rug on the wall can reduce the decibles. Frank C.

[slider]

Vibration was always an issue with my old onan mufflers.I finally fabricated a 4 in single piece of tubing with 2  baffles inside.One was a 3/4 baffle and the other was 4 in diameter but had 3/8's holes .It came from a old feed mill screen.I was quiet surprised how quiet it was.

[sealark37]

I found a pair of Suzuki motorcycle mufflers (almost new) at the country dump,er, recycling center.  I plumbed one up to my engine and it made it MUCH more pleasant to work around.   Regards, Clark