Muffler Stack Zippo Style

Another Muffler Stack joins the ranks. The old BR6 LOVES this stack and as you can see in the video, I had to do a little fine tuning of the main jet after changing the muffler out. The reason for this is simple.....when you increase or decrease the back pressure, the carburetor requires a little fine tuning. Hope everyone is well!! Cheers!!

Category:

Education

Tags:

• Briggs
• B&S
• and
• Stratton
• small
• engine
• gas
• muffler
• exhaust
• stack
• custom
• vintage
• antique
• old
• briggs

[Ram2253spd]

Looks great!

[ZippoVarga]

@Ram2253spd Thanks Ram Buddy!! 

[zulu696Q]

That must have been a pretty good size Bolens Huski walkbehind to have a B model Briggs on it, or is that a donor fuel tank?

[ZippoVarga]

@zulu696Q It was actually used to run a conveyor system as a back up in the event of a power outage at a food processing plant. From the over all condition of the internals and external paint, I am confident that this engine was not used very much. The only worn out part of the whole engine was the oil fill cap...to me, that says that the engine was religiously maintained. This engine, although over 100 pounds, only produces 2 and 3/4 horse power, believe it or not. Cheers!!

[mrwiggles2]

That old girl sounds terrific. I can't believe we're only weeks away from the "holidays". I am picking up the Onan from the shop tomorrow- you were right, crank needed turning to 10 under. Thanks for your expertise Zippo.

[ZippoVarga]

@mrwiggles2 Although I prefer to be wrong with things like your Onan, I'm glad I nailed the problem. It's not real easy to diagnose due to poor sound quality, but you got the knock recorded very well, so that made it a little easier on me. I hope she's in tip top shape when you get her back and it's a good thing you found the problem before a catastrophic failure (like a blown connecting rod) happened. Cheers Buddy!!

[ZippoVarga]

@oologahan I reduced the exhaust diameter by 1/4 inch and there is a large Chicago screw in the stack that also aids in keeping back pressure up. Also, with the added length, the back pressure increases exponentially. You can go watch the first running video of this engine and see the muffler that was on it. That muffler has no baffle, so the stack I put on increased the back pressure from the original muffler, so the valves should be good. And you're correct, it will damage valves and seats.

[akretowicz]

I have an A & B Briggs. Both in the works stage right now. Yours sounds teriffic! Must be just the right combination of length and diameter to get that nice sound.

[NomaDairy]

@ZippoVarga No Problem, Call me Mathew :)

[ZippoVarga]

@805ROADKING I really scored a good engine when I haggled for that old BR6 at the local tractor show. But now that I have the Maytag BUG, I'm on the hunt for more models of those. Thanks for the kudos my Friend!!

[ZippoVarga]

@NomaDairy Thanks Noma!!!!!!! I love doing these exhausts....takes me back to my bike building days!

[ZippoVarga]

@oldchevy4x4 Thanks 4x4!! I have an affinity for these custom exhausts that borders on the need for a 12 step program! lol