@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.
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.
Well another fine piece of custom work by Zippo. sounds sweet. There is so much I'd like to do to my LL, once it is running. But I have to get Karen's to do list satisfied FIRST. Danny turned 11 today. I have 5 great days ahead, and I hope to spend time on the Queen and the LL.All 50's ahead!
@GrincheyOne Sir Grinchy!! I sure hope that you can get all of your honeydoo list done and still have time to get to the Queen and Landlord!! Cheers my good Friend!!
@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!!
@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!!
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.
@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!!
@oologahan There is good back-pressure with that stack and you are correct...low or no back pressure WILL cause the exhaust valve to prematurely fail. Where I gained my back pressure was with a 3/8" Chicago bolt and inside of the stack is an 8 inch long 3/4" black pipe with the upper end crimped. This served two purposes....back-pressure and it keeps the stainless stack from rattling since I crimped it to match the diameter of the stainless pipe. Hows things going in oologahan territory? Cheers!
I have a 5000 watt generator set that would fit beside that 6 with a short mechanical coupler or V belt. The brackets on it now are to mount behind a 7000 or 7100 Simplicity and to run off the mid machine PTO gear box using the roto tiller belts. Many custom exhaust stacks can become one speed only engines due to finicky carb settings. Motor has to breath afterall. I like working on old stuff. Thats mostly because that is all that I own :)
@BornRandy62 Same here my friend! Same here!! The newest vehicle I have is a 1988 Silverado and with just less than 200 miles before it turns a quarter million miles on it is testament enough that they don't make them like they used to!! Give me an old machine over something new any day. Cheers Bro!!
@23mrcowboys Heya Ben! You can do it bro! Just follow my videos along and you will be the envy of your neighbors in no time. Tons of options Bro! Let me know if I can help you out. Cheers my good Friend!!!
@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.
ZippoVarga 3 months ago
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.
akretowicz 3 months ago
Looks great!
Ram2253spd 3 months ago
@Ram2253spd Thanks Ram Buddy!!
ZippoVarga 3 months ago
Well another fine piece of custom work by Zippo. sounds sweet. There is so much I'd like to do to my LL, once it is running. But I have to get Karen's to do list satisfied FIRST. Danny turned 11 today. I have 5 great days ahead, and I hope to spend time on the Queen and the LL.All 50's ahead!
GrincheyOne 3 months ago
@GrincheyOne Sir Grinchy!! I sure hope that you can get all of your honeydoo list done and still have time to get to the Queen and Landlord!! Cheers my good Friend!!
ZippoVarga 3 months ago
Looks and sounds great bud
oldchevy4x4 3 months ago
@oldchevy4x4 Thanks 4x4!! I have an affinity for these custom exhausts that borders on the need for a 12 step program! lol
ZippoVarga 3 months ago
I like it! sounds really good!
NomaDairy 3 months ago
@NomaDairy Thanks Noma!!!!!!! I love doing these exhausts....takes me back to my bike building days!
ZippoVarga 3 months ago
@ZippoVarga No Problem, Call me Mathew :)
NomaDairy 3 months ago
You have the ol' BR runnin' like a fine Swiss Watch!! Sounds great Buddy!!☺
805ROADKING 3 months ago
@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 3 months ago
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?
zulu696Q 3 months ago
@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!!
ZippoVarga 3 months ago
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.
mrwiggles2 3 months ago
@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 3 months ago
@oologahan There is good back-pressure with that stack and you are correct...low or no back pressure WILL cause the exhaust valve to prematurely fail. Where I gained my back pressure was with a 3/8" Chicago bolt and inside of the stack is an 8 inch long 3/4" black pipe with the upper end crimped. This served two purposes....back-pressure and it keeps the stainless stack from rattling since I crimped it to match the diameter of the stainless pipe. Hows things going in oologahan territory? Cheers!
ZippoVarga 3 months ago
I have a 5000 watt generator set that would fit beside that 6 with a short mechanical coupler or V belt. The brackets on it now are to mount behind a 7000 or 7100 Simplicity and to run off the mid machine PTO gear box using the roto tiller belts. Many custom exhaust stacks can become one speed only engines due to finicky carb settings. Motor has to breath afterall. I like working on old stuff. Thats mostly because that is all that I own :)
BornRandy62 3 months ago
@BornRandy62 Same here my friend! Same here!! The newest vehicle I have is a 1988 Silverado and with just less than 200 miles before it turns a quarter million miles on it is testament enough that they don't make them like they used to!! Give me an old machine over something new any day. Cheers Bro!!
ZippoVarga 3 months ago
that stack does make that old BR6 sound really good.
TheBigspoon1 3 months ago
@TheBigspoon1 I love the sound/tone that a stainless exhaust makes. Not to mention the cool factor. Thanks for stopping by Bro!!
ZippoVarga 3 months ago
THAT IS AWESOME! ID LOVE TO HAVE THAT EXHAUST WITH THE LITTLE FLIPPER THINGY ON THE TOP ON MY JOHN DEER RIDING MOWER!
23mrcowboys 3 months ago
@23mrcowboys Heya Ben! You can do it bro! Just follow my videos along and you will be the envy of your neighbors in no time. Tons of options Bro! Let me know if I can help you out. Cheers my good Friend!!!
ZippoVarga 3 months ago