I just purchased a Firman Tri-Fuel generator for my home. Your video will greatly assist me in setting it up properly! Thank you! Great idea and great video! 👍
Claude Perrault, how did this project go for you? I've been researching the Firman Tri-Fuel generator with the idea of plumbing natural gas from my furnace in my garage. I want to run the generator in my garage and vent the exhaust outside. Any advice?
The original problem was getting the exhaust OUT the garage while leaving the generator inside. No problem. Problem solved. But how? How did you get the pipe out of the garage? Did you cut a hole in the door? Wall? Crack the garage door open and run it underneath? How about the temperature of the pipe when the generator has run for several hours. What's the story with all that?
nice job which gave me some good ideas. I am doing in an enclosed shed and will bend 90 degree in order to run exhaust higher to lessen carbon monoxide. will probably install a rain cap to keep water out. going to use conduit for pipe.Does that permatex red rtv gasket seal cure and harden up? thank you.
Thanks for stopping in and commenting. To answer your question, once cured, it's more of a hard rubber. For lack of a better example I would say like a kids supper ball depending on the thickness of course and malleable to an extent. That said, Always be sure to use a carbon monoxide sensor if placing in a room that's exposed to traffic. Better safe then sorry.
Very nice. What i like about yours compared to other solutions is it does not damage the original exhaust, able to detach flex tubing if needed and air tight seal. Correct me if im wrong but your tubing is all wider so less back pressure.
Thanks for stopping in. Yes you are correct.. no different then say for example putting a quarter over a dime.. I've ran the generator for long periods without it ever stalling or choking itself out so back pressure is really not an issue. If you're really concerned with that I suppose you could add a manifold for a fan to introduce cool fresh air into the tubbing chamber, forceing freash air and hot exhaust out..
I looked for them in your description. I can't find any parts that show the flexible muffler pipe transitioning to the wall of a building and through to the outside.... 😮 Thanks. Do you have a follow up video to this. Did you install your generator in your garage? Or a shed? Do you have a cinder block wall or wood framed wall you went through to the outside?
I just happened to run across this video... I made a similar video a little before this I think. I knew there had to be a better way.... I just cut grooves in the exhaust tube and used a hose clamp (technically it runs outside my camper on a slide tray anyway). However, it does come loose from time to time. I have a couple more mods to do and this looks like a great one to add to the list!!
When I first created this video I didn't think it would receive as much notoriety as it has. I to did my TH-cam homework before crafting my own spin on this, there just wasn't much out there that I felt safe with.. I plan on doing a future carbon monoxide box test video on this to see just how safe it is to be left unattended for overnight camper applications.. safety first and I will always have meter close by to insure I don't kill myself... you just never know
@@TheChemistDIY my video of mounting it in the camper has gone crazy but a lot of comments say I’m too ocd about the carbon monoxide. Because it runs outside, I knew my method to further direct the exhaust (as I previously described) could leak some so I put a fan behind it to further blow outward from the camper and I have a carbon monoxide monitor just inside the camper... no reason for unnecessary chances if you ask me
I ended up doing something similar. I added a link to your video rather than giving a lot of instruction... it’s not public yet, but tell me what you think... th-cam.com/video/YZrglOz16yQ/w-d-xo.html
Great job! I use my (exact same) generator to power a travel trailer while dry camping. I need to turn the exhaust straight up so that it doesn’t get too hot on other gear in the truck. This increases the inside diameter of the pipe quite a lot so it shouldn’t be too much restriction even turned 90 degrees. I might try doing that with pipe fittings instead of flex pipe. I guess it will be important to not put any stress on the two bolts since they are only intended to hold the spark arrester.
Yeah, I was suggest creating your own support hardware for the heavy piping.. just make sure to attach it to things that can support the heat transferred from the exhaust pipe to your bracketry. The exhaust pipe does get extremely hot and the last thing you want is to melt, burn, or catch fire to the object the bracketry is attached to.
Unreal!!! U are a true mcgyver.i have a ryobi,propane Generator.it does not have an external pipe but it somehow sits flush with the spark arrestor.i have no idea how im going to do mine .thanks for the ideas
Thanks, Scott. No the arrestor was not put back in but can be implemented if you like. You would just need to install it before adding the silicone so that the impression is included in your rubber gasket. Hope that helps ya out.
This is on option totally up to you and can be incorporated with this modification. If out camping I would suggest using the arrestor as not to start any fires should a backfire occur causing a sudden flame.
+So your saying to use the silicone to hold the spark arrester in place? I can’t see how in will stay in place with the larger 1” flange and tubing . I have the same generator and at the 3/4” reducer I screwed in a short piece of 1/2” conduit that holds the spark arrester perfectly. Just use a 1/2 in conduit coupler to hold it in place. One screw removal to clean spark arrester.
Technically you don't.. but doing so offers more benefit then not. Lighter, less surface to collect & transfer heat from the exhaust muffler, reduced vibration and less chance of loud rattling and or vibration loosening the two fasteners, visually appealing and doesn't look like some hack job.
@@theGeorgioShow, you misunderstood my friend.. what I meant was, technically you don't have to cut down the floor flange.. but if you do then it offers all the previously stated benefits mentioned in my last post... Make sense??
Yes, but It can easily be incorporated in if you like. Before adding the RTV silicone in the threaded area set your spark arrest in like normal and add the silicone. This will leave the impression in the silicone when it drys.
Thanks for the props, greatly appreciated. One quick note about adding a second exhaust. Since this is a small engine it may not be able to handle the double filtration back pressure. Its one thing to add a larger diameter tubing to extend but another thing to impede or restrict the amount of exhaust extrusion, doing so may cause the engine to choke out. But if you do try let me know how it goes and what exhaust muffler you used. Also I'm curious to know why you want to add a second.
I’m considering mounting a generator inside of my van build. The exhaust will run through a sealed hole in the floor of the van. If the exhaust is perfectly sealed, do you think there is no other potential for carbon monoxide escape?
In a perfect world things will go according to plan but I'm not one to leave it to chance.. always error on the side of caution and pick yourself up a carbon monoxide sensor with a LOUD audible alarm. Even if our modifications work flawlessly there's always the chance of it leaking from some other place we didn't have our hands in.
James Moreno's workmanship and video are excellent; but remember that there is wind/air flow at the exit of the pipe/hose. Imagine the wind shifts and blows the exhaust back down the pipe. And there is nothing to force/exhaust the fumes to move through the pipe. Just a thought. Good luck.
Ok where did you use the cap screws? Also in your links, you have some long screws but the screws used in the video seem much shorter. Also can we get links to the silicone you used? Better yet, are you interested in just making more of those flange things for sale?
Awesome KC, glad you enjoyed. Come back and Let me know how it goes.. one word of advice, be sure to get a long enough flex tubing and cut away what you don't need. The link to get the tubing through Amazon is in the descriptions.. the one from the local automotive is roughly about elbow to finger tips length.. and what ever you do don't touch the flexible tubing after you have started the generator.. it get extremely hot real quick like any exhaust.. Good luck on your build..
@@TheChemistDIY So the exhaust pipe gets very hot. Naturally. But did you insulate it so it would not create a problem for any material nearby? Did you run it through a wall or the garage door? Or did you leave he garage door up a little and run it underneath? How did you manage that hot exhaust pipe?
@@__GALLANT__ there was no insulation around the flex tube and yes it gets extremely hot. The exhaust pipe runs out through one of the small lower vents on the garage wall. Since the tube is flexible to any position it free floats through a larger diameter hole in that vent.. but if you need to creat a seal, one can be made using the high temp gasket sealant to insure nothing can back feed into the garage with say windage.. the sealant should absorb most of the heat that comes in contact with the vent housing but be sure to check with meter..
This design does not include the spark arrestor but it can easily be added to what I have demonstrated in the video by placing it in it's normal spot during the Silicone gasket making of the flange so the OEM bracket pattern is retained.
That exhaust exposed like this will burn anything it touches. Also, should have showed the diff in sound before and after. Thanks for the video in all cases
Yes! The flex tube gets extremely hot and I don't suggest you leave this exposed if you have kids around.. that of course is only common sense because it's connected to the exhaust muffler which you already know gets extremely hot . I suppose a before and after sound test would have helped some out.. but at the time my goal wasn't to reduce db leave only extend the pipe without heavy modification. To answer that question, no it doesn't reduce the exhaust sound..
Man my screws kept loosening on mine. I found some high heat lock tight and that worked for a while, but now it's loose again. Back to the drawing board I suppose
Are you speaking of the modification bolts I used to hold the new flange in place? Maybe if you create a high temp washer to place in between the flange and bolt head this will soften the vibration, act as a damper and eliminate the bolt from walking loose... Just my two cents
So for a quick fix, I just added a small star washer to both side screws in the pipe flange with more high heat thread locker. Going to try that on my trip out west next month. If it comes loose I’m going to do safety wire
FYI EVERYONE WHO HAS HARD TIME RESTARTING THE PREDATOR 3500 WHEN ITS HOT OUTSIDE... All you have you have to do is remove the gas cap and it will start right up. Just needs to vent. Somehow it took me almost two summers to finally figure this out lol. . ALSO Jesus Christ delivered me from meth, adderall prescription, alcoholism, cigs etc in Sept 2014. No rehab or any other outside help! Just the Lord and His Word!! Eternal life in Jesus Christ alone. Make sure you seek and abide in Him!
Should also mention if (not exactly common) generator starts to go weak and rev back up often, also a ventilation problem. I have to unscrew cap and leave cap just barely on at all or my generator will get real weak and pretty much die every time my AC kicks on... new thing that just started today
If I get enough request I'll look into making that video with parts listing. I have no need for it since my exhaust tubing just ports out my garage vents and the only sound I bearly hear is the generator inside the garage. But im sure that would be a nice addition for RV users and camping enthusiasts.. thanks for the comment J..
I took my New muffler off New generator & straight to an exhaust muffler shop & let them weld it for $20 in 20 minutes. Only thing I did differently was that I installed a 1" hose at 15 feet. Instead of 3/4" I went 1" off the muffler.
I have watched several exhaust videos and hear a lot about the exhaust pipe coming in contact with the plastic grill, possibly causing a fire. Why not use a Dremel tool make the hole bigger and alleviate that worry.
This method should alleviate that problem since we are using a solid pipe to extend out the plastic porthole for the exhaust. But to answer your question it all boils down to if you purchase the extended warranty. If something should happen to the generator and you have modified it in some way then this would void that warranty.
Hey Aldo, I've been toying around with the notion of selling just the flange as many have asked the same question of me. Problem is pricing, labor, and shipping cost. Since the part is made of galvin steel it has some weight to it, so standered shipping cost add about $10-15 alone. Then there's time vs. money. To make one or two here and there it's really not worth it and most usually back out once they here the cost for a custom made hand Crafted part that no else makes. People have gotten so use to buying things popped out by a machine that they tend to frown upon the pricing from those who make something from scratch and by hand. I have looked into getting the flange Aluminum CnC'd made which is more light weight with regards to shipping but that requires a hefty upfront investment and without a group buy (kick starter) of say, at least, 25 units this idea can't move forward. It's really only the flange that is needed. The rest can be bought online.
@@TheChemistDIY thanks for the reply. I’m willing to pay for items, labor time and shipping if you’re willing to help me out with one. You name your hourly rate and we can work from there. This is something I would really like to have. Thanks for your time!!
Don't think it's going to add much, if any. I have TH-cam content creators who have done my same mod and applied it to RV living with no issues. You can TH-cam the same heading as mine and see there videos and ask how it's working for them as they will undoubtedly have more run time hours then me. I thought about the same and was going to create a manifold with a helper fan to evac the exhaust fumes but at the length of the flex tube I'm using it really wouldn't be worth it.
@@TheChemistDIY this is the video I got the idea from. But I am just using the flat mats and tracing around the flange to make mine. th-cam.com/video/THbHX2nYRlI/w-d-xo.html
Nobody addresses the problem caused by changing the back pressure in the engine. You have no idea of intake pressure before you start. Increasing the exhaust length increases pressure but decreases engine efficiency. If you checked, you'd probably see rpm s decrease as well as torgue because the generator is engineered to run at low rpm. High RPM helps reduce the back pressure. I'd say you would have to consult the manufacturer about this. When you do that, they will say-don't mess with their shit-don't extend the exhaust because you can't use our generator in ANY kind of enclosed space. If you don't believe us-ask our lawyers.
He has increased the diameter of the exhaust pipe and as long as he doesn’t have any tight bends in that 1 1/4 flex exhaust pipe he hasn’t increased the back-pressure to that engine. The exhaust is 3/4 coming out of that generator and he installed 1 1/4 pipe.
Tru enough but that can be saide with all of YT. Let me provide some education here. Take a look at the dates those videos were created in comparison to mine... You sir have stumbled upon the originator that led to those copies... 😉
Sorry brother, I've been asked before and it's something I'm just not interested in doing, not do I have access to the 2000 model to insure proper fitment.
Hey MEO, Actually I've had quite a few people ask me to make a kit for the 2000 watt HF Gen/inverter and the answer is I can't since I don't have one to make a JIG for the flange setup. I don't know if HF is using the same exhaust muffler as the 3500 watt big brother. There are to many variables including mounting whole locations, exhaust pipe size, location of the exhaust exit hole with regards to the plastic covering.. If you don't get the extension pipe exactly dead center then it could touch the plastic covering and cause melting. If I had a loaner Generator for a week or two I could make kits for sale.
@@TheChemistDIY sombody give this guy a loaner so we can start the bizness. Hahah thanks for the reply bro. I totally understand. Let me know if you do make some. God bless. Peace
Yes, it would be wise to put up a carbon monoxide sensor to alert you if there is a leak. This is also required by law to have in homes in most states. If performing this mod for the use in an RV i highly suggest you put one in as well. Better safe than sorry
Brother, if you can't figure out how to secure fasteners in place and keep them from backing out do to vibration then DIY and fabrication in general, is not for you.. let me educate you a bit before you attempt this and kill yourself.. it's called loctite and comes in two colors, blue and red.. one holds stronger then the other buuuut I'll let you do your own homework from here.. Thanks for commenting..
James Moreno' Just play some Ted Nugent / Strangehold or Turn that thing down by Cheech and Chong in the next video. Just Damm! for get those, Just play some Sleeze Joe' Guardian Angel loudest band ever, and if 'John 6:44' can't hear you? Post back, Sorry! John 6:44 i can't hear you, the music is too loud. Damm! humans love to bitch about nothing. Good job on the DIY.
Why the f... Do we gotta here that groovy wanna be music. I'm good with quiet. That noise you call music makes me wanna not watch this. I have my own music and I listen when I want. Not when I'm trying to focus on what your saying not on dancing music.
It's as simple and moving on to the next TH-cam content creators video that doesn't have music brother.. but I guess the build was so good that it made you stay and comment. Thanks for posting your thoughts, I'll keep that in mind ..
@@TheChemistDIY Quite honestly.... I didn't even notice the music till I read the comment I had to go back and rewatch lol Good stuff I plan on doing this project sooner or later. Thank you
@@TheChemistDIY Just play some Ted Nugent / Strangehold or Turn that thing down by Cheech and Chong in the next video. Just Damm! for get those, Just play some Sleeze Joe' Guardian Angel loutest band ever, and if 'John 6:44' can't hear you? Post back, SOrry! John 6:44 i can't hear you, the music is too loud. Damm! humans love to bitch about nothing.
I just purchased a Firman Tri-Fuel generator for my home. Your video will greatly assist me in setting it up properly! Thank you! Great idea and great video! 👍
Thanks for stopping in and commenting Claude. Be sure to come back and let us know how this DIY worked on your project.
Claude Perrault, how did this project go for you? I've been researching the Firman Tri-Fuel generator with the idea of plumbing natural gas from my furnace in my garage. I want to run the generator in my garage and vent the exhaust outside. Any advice?
Came out nice but you never put any sealant on the pipe threads themselves ??
The original problem was getting the exhaust OUT the garage while leaving the generator inside. No problem. Problem solved. But how? How did you get the pipe out of the garage? Did you cut a hole in the door? Wall? Crack the garage door open and run it underneath? How about the temperature of the pipe when the generator has run for several hours. What's the story with all that?
I just spent an hour sifting through the hardware store to no avail. This gave me some ideas. Thank you.
Dam, was waiting to hear in run.
Great exhaust system. I especially liked the high temperature seals.
Great video with super clear directions, both visual and verbal.
nice job which gave me some good ideas. I am doing in an enclosed shed and will bend 90 degree in order to run exhaust higher to lessen carbon monoxide. will probably install a rain cap to keep water out. going to use conduit for pipe.Does that permatex red rtv gasket seal cure and harden up? thank you.
Thanks for stopping in and commenting. To answer your question, once cured, it's more of a hard rubber. For lack of a better example I would say like a kids supper ball depending on the thickness of course and malleable to an extent.
That said, Always be sure to use a carbon monoxide sensor if placing in a room that's exposed to traffic. Better safe then sorry.
Very nice. What i like about yours compared to other solutions is it does not damage the original exhaust, able to detach flex tubing if needed and air tight seal. Correct me if im wrong but your tubing is all wider so less back pressure.
Thanks for stopping in. Yes you are correct.. no different then say for example putting a quarter over a dime.. I've ran the generator for long periods without it ever stalling or choking itself out so back pressure is really not an issue. If you're really concerned with that I suppose you could add a manifold for a fan to introduce cool fresh air into the tubbing chamber, forceing freash air and hot exhaust out..
How does removing that spark arrester not void the warranty?
Would you explain how you connected your flexible muffler pipe to the outside? What adapter or fittings did you use to go through the wall? 🧱😯
All parts for this project can be found in the description section.
I looked for them in your description. I can't find any parts that show the flexible muffler pipe transitioning to the wall of a building and through to the outside.... 😮 Thanks. Do you have a follow up video to this. Did you install your generator in your garage? Or a shed? Do you have a cinder block wall or wood framed wall you went through to the outside?
Hi! Good job! Now we have been waiting all the time to see if you "show" the difference between the original exhaust and your modification...
I just happened to run across this video... I made a similar video a little before this I think. I knew there had to be a better way.... I just cut grooves in the exhaust tube and used a hose clamp (technically it runs outside my camper on a slide tray anyway). However, it does come loose from time to time. I have a couple more mods to do and this looks like a great one to add to the list!!
When I first created this video I didn't think it would receive as much notoriety as it has. I to did my TH-cam homework before crafting my own spin on this, there just wasn't much out there that I felt safe with.. I plan on doing a future carbon monoxide box test video on this to see just how safe it is to be left unattended for overnight camper applications.. safety first and I will always have meter close by to insure I don't kill myself... you just never know
@@TheChemistDIY my video of mounting it in the camper has gone crazy but a lot of comments say I’m too ocd about the carbon monoxide. Because it runs outside, I knew my method to further direct the exhaust (as I previously described) could leak some so I put a fan behind it to further blow outward from the camper and I have a carbon monoxide monitor just inside the camper... no reason for unnecessary chances if you ask me
I ended up doing something similar. I added a link to your video rather than giving a lot of instruction... it’s not public yet, but tell me what you think...
th-cam.com/video/YZrglOz16yQ/w-d-xo.html
😮 awesome video
Great job! I use my (exact same) generator to power a travel trailer while dry camping. I need to turn the exhaust straight up so that it doesn’t get too hot on other gear in the truck. This increases the inside diameter of the pipe quite a lot so it shouldn’t be too much restriction even turned 90 degrees. I might try doing that with pipe fittings instead of flex pipe. I guess it will be important to not put any stress on the two bolts since they are only intended to hold the spark arrester.
Yeah, I was suggest creating your own support hardware for the heavy piping.. just make sure to attach it to things that can support the heat transferred from the exhaust pipe to your bracketry. The exhaust pipe does get extremely hot and the last thing you want is to melt, burn, or catch fire to the object the bracketry is attached to.
Well done!
Unreal!!! U are a true mcgyver.i have a ryobi,propane Generator.it does not have an external pipe but it somehow sits flush with the spark arrestor.i have no idea how im going to do mine .thanks for the ideas
Subbed boss, marvel of a video. Thanks🙏
Thanks for the vid,very helpful and just the info I was searching for.
Hi! Great video! What about the spark arrestor? It looks like you did not put it back in?
Thanks, Scott. No the arrestor was not put back in but can be implemented if you like.
You would just need to install it before adding the silicone so that the impression is included in your rubber gasket. Hope that helps ya out.
Don't you need to put the spark arrestor back on?
This is on option totally up to you and can be incorporated with this modification. If out camping I would suggest using the arrestor as not to start any fires should a backfire occur causing a sudden flame.
+So your saying to use the silicone to hold the spark arrester in place? I can’t see how in will stay in place with the larger 1” flange and tubing . I have the same generator and at the 3/4” reducer I screwed in a short piece of 1/2” conduit that holds the spark arrester perfectly. Just use a 1/2 in conduit coupler to hold it in place. One screw removal to clean spark arrester.
No, the silicone will only hold the impression of the spark arrestor frame. You will place both on to the muffler and bolt on bolt on like normal...
I have the same 3500w and I'm curious why did you have to cut up the flange
Technically you don't.. but doing so offers more benefit then not. Lighter, less surface to collect & transfer heat from the exhaust muffler, reduced vibration and less chance of loud rattling and or vibration loosening the two fasteners, visually appealing and doesn't look like some hack job.
@@TheChemistDIY What do you mean I don't have the same predator 3500 watt generator?
@@theGeorgioShow, you misunderstood my friend.. what I meant was, technically you don't have to cut down the floor flange.. but if you do then it offers all the previously stated benefits mentioned in my last post...
Make sense??
@@TheChemistDIY makes much sense. Yes I did misunderstood poorly. My bad lol
what do you call that flexible pipe?
Flex tubing
Did you leave the spark arrestor out ?
Yes, but It can easily be incorporated in if you like. Before adding the RTV silicone in the threaded area set your spark arrest in like normal and add the silicone. This will leave the impression in the silicone when it drys.
Thanks for your quick reply I’m trying to do the same thing you did I’m not gonna put in my spark arrester because I may add a muffler
you have some of the best ideas out there for real I’ve watched dozens of videos on how to extend mufflers
Thanks for the props, greatly appreciated. One quick note about adding a second exhaust. Since this is a small engine it may not be able to handle the double filtration back pressure. Its one thing to add a larger diameter tubing to extend but another thing to impede or restrict the amount of exhaust extrusion, doing so may cause the engine to choke out. But if you do try let me know how it goes and what exhaust muffler you used.
Also I'm curious to know why you want to add a second.
@@TheChemistDIY Should I remove the factory muffler and add a car muffler
I’m considering mounting a generator inside of my van build. The exhaust will run through a sealed hole in the floor of the van. If the exhaust is perfectly sealed, do you think there is no other potential for carbon monoxide escape?
In a perfect world things will go according to plan but I'm not one to leave it to chance.. always error on the side of caution and pick yourself up a carbon monoxide sensor with a LOUD audible alarm.
Even if our modifications work flawlessly there's always the chance of it leaking from some other place we didn't have our hands in.
James Moreno's workmanship and video are excellent; but remember that there is wind/air flow at the exit of the pipe/hose. Imagine the wind shifts and blows the exhaust back down the pipe.
And there is nothing to force/exhaust the fumes to move through the pipe. Just a thought.
Good luck.
WOW, all that attention to detail in sealing the system and then............ NO PIPE DOPE on the threads. Good idea though.
Pipe dope not go do any good in this situation
@@grasser82 why not...would the pipe dope melt?
@@clyoul3ss819 yes i think its only good to 125 degrees f
@@clyoul3ss819 There are high temp fire caulk products on the market that can be used.
I know this is three years ago, but darn. Didn't you see all of that high temp gasket material in the flange when he screwed that nipple in?
Well done sir.
Ok where did you use the cap screws? Also in your links, you have some long screws but the screws used in the video seem much shorter. Also can we get links to the silicone you used?
Better yet, are you interested in just making more of those flange things for sale?
This was a great idea, thanks for the video. I am going to use this.
Awesome KC, glad you enjoyed. Come back and Let me know how it goes.. one word of advice, be sure to get a long enough flex tubing and cut away what you don't need. The link to get the tubing through Amazon is in the descriptions.. the one from the local automotive is roughly about elbow to finger tips length.. and what ever you do don't touch the flexible tubing after you have started the generator.. it get extremely hot real quick like any exhaust..
Good luck on your build..
@@TheChemistDIY So the exhaust pipe gets very hot. Naturally. But did you insulate it so it would not create a problem for any material nearby? Did you run it through a wall or the garage door? Or did you leave he garage door up a little and run it underneath? How did you manage that hot exhaust pipe?
@@__GALLANT__ there was no insulation around the flex tube and yes it gets extremely hot. The exhaust pipe runs out through one of the small lower vents on the garage wall. Since the tube is flexible to any position it free floats through a larger diameter hole in that vent.. but if you need to creat a seal, one can be made using the high temp gasket sealant to insure nothing can back feed into the garage with say windage.. the sealant should absorb most of the heat that comes in contact with the vent housing but be sure to check with meter..
Do you put the spark arrestor back on ? If you feed it into a tin can with tiny drill holes in it, i wonder how quiet it would be. Nice project tho
This design does not include the spark arrestor but it can easily be added to what I have demonstrated in the video by placing it in it's normal spot during the Silicone gasket making of the flange so the OEM bracket pattern is retained.
That exhaust exposed like this will burn anything it touches. Also, should have showed the diff in sound before and after. Thanks for the video in all cases
Yes! The flex tube gets extremely hot and I don't suggest you leave this exposed if you have kids around.. that of course is only common sense because it's connected to the exhaust muffler which you already know gets extremely hot .
I suppose a before and after sound test would have helped some out.. but at the time my goal wasn't to reduce db leave only extend the pipe without heavy modification. To answer that question, no it doesn't reduce the exhaust sound..
Man my screws kept loosening on mine. I found some high heat lock tight and that worked for a while, but now it's loose again. Back to the drawing board I suppose
Are you speaking of the modification bolts I used to hold the new flange in place? Maybe if you create a high temp washer to place in between the flange and bolt head this will soften the vibration, act as a damper and eliminate the bolt from walking loose... Just my two cents
I think I’m going to try to use some safety wire…
Keep me posted on which method you use and it works. I'm curious to know and I'm sure others are too if experiencing this issue.
So for a quick fix, I just added a small star washer to both side screws in the pipe flange with more high heat thread locker. Going to try that on my trip out west next month. If it comes loose I’m going to do safety wire
Awesome, keep us posted on your findings, thanks!
What? why didnt you run it?
Good job !
FYI EVERYONE WHO HAS HARD TIME RESTARTING THE PREDATOR 3500 WHEN ITS HOT OUTSIDE... All you have you have to do is remove the gas cap and it will start right up. Just needs to vent. Somehow it took me almost two summers to finally figure this out lol. . ALSO Jesus Christ delivered me from meth, adderall prescription, alcoholism, cigs etc in Sept 2014. No rehab or any other outside help! Just the Lord and His Word!! Eternal life in Jesus Christ alone. Make sure you seek and abide in Him!
Good for you and your family.
Should also mention if (not exactly common) generator starts to go weak and rev back up often, also a ventilation problem. I have to unscrew cap and leave cap just barely on at all or my generator will get real weak and pretty much die every time my AC kicks on... new thing that just started today
Would be nice to expand this to include an additional chambered muffler too. Make these things whisper quiet.
If I get enough request I'll look into making that video with parts listing. I have no need for it since my exhaust tubing just ports out my garage vents and the only sound I bearly hear is the generator inside the garage. But im sure that would be a nice addition for RV users and camping enthusiasts.. thanks for the comment J..
Most of the noise from any generator comes from the engine block directly and not the exhaust.
Diesel heater exhaust and mufflers fit right on this generator without building anything and are cheap
There a video on YT that show it on this Gen?
@@TheChemistDIY no I am about to make one ill write you a comment when I get it made. I tested it already I just have to make the video now
Please do, curious to see.
@@TheChemistDIY ok I just got it today ill go do a short video and post it right now
@@TheChemistDIY uploading video now check my channel for newest video
I took my New muffler off New generator & straight to an exhaust muffler shop & let them weld it for $20 in 20 minutes. Only thing I did differently was that I installed a 1" hose at 15 feet. Instead of 3/4" I went 1" off the muffler.
Or you can do that 😂
I have watched several exhaust videos and hear a lot about the exhaust pipe coming in contact with the plastic grill, possibly causing a fire. Why not use a Dremel tool make the hole bigger and alleviate that worry.
This method should alleviate that problem since we are using a solid pipe to extend out the plastic porthole for the exhaust. But to answer your question it all boils down to if you purchase the extended warranty. If something should happen to the generator and you have modified it in some way then this would void that warranty.
Am I able to buy this off of you? Unfortunately I’m not skillful in cutting nor do I have the tools to do so.
Hey Aldo, I've been toying around with the notion of selling just the flange as many have asked the same question of me. Problem is pricing, labor, and shipping cost. Since the part is made of galvin steel it has some weight to it, so standered shipping cost add about $10-15 alone. Then there's time vs. money. To make one or two here and there it's really not worth it and most usually back out once they here the cost for a custom made hand Crafted part that no else makes.
People have gotten so use to buying things popped out by a machine that they tend to frown upon the pricing from those who make something from scratch and by hand.
I have looked into getting the flange Aluminum CnC'd made which is more light weight with regards to shipping but that requires a hefty upfront investment and without a group buy (kick starter) of say, at least, 25 units this idea can't move forward. It's really only the flange that is needed. The rest can be bought online.
@@TheChemistDIY thanks for the reply. I’m willing to pay for items, labor time and shipping if you’re willing to help me out with one. You name your hourly rate and we can work from there. This is something I would really like to have. Thanks for your time!!
Cost
Subscribed thank you James!
Good one
Thank you! Cheers!
I worry about creating any back pressure by extending the length of rhe exhaust pipe.
Don't think it's going to add much, if any. I have TH-cam content creators who have done my same mod and applied it to RV living with no issues. You can TH-cam the same heading as mine and see there videos and ask how it's working for them as they will undoubtedly have more run time hours then me.
I thought about the same and was going to create a manifold with a helper fan to evac the exhaust fumes but at the length of the flex tube I'm using it really wouldn't be worth it.
I make my gaskets from silicone baking mats.
That's actually a pretty slick idea.. never thought about that.. Got a video on it?
@@TheChemistDIY this is the video I got the idea from. But I am just using the flat mats and tracing around the flange to make mine. th-cam.com/video/THbHX2nYRlI/w-d-xo.html
@@Idahoprepper71 man that in is one awesome and we'll thought out enclosure.. thanks for sharing..
Nobody addresses the problem caused by changing the back pressure in the engine. You have no idea of intake pressure before you start. Increasing the exhaust length increases pressure but decreases engine efficiency. If you checked, you'd probably see rpm s decrease as well as torgue because the generator is engineered to run at low rpm. High RPM helps reduce the back pressure. I'd say you would have to consult the manufacturer about this. When you do that, they will say-don't mess with their shit-don't extend the exhaust because you can't use our generator in ANY kind of enclosed space. If you don't believe us-ask our lawyers.
Was thinking the same thing any work around this?
He has increased the diameter of the exhaust pipe and as long as he doesn’t have any tight bends in that 1 1/4 flex exhaust pipe he hasn’t increased the back-pressure to that engine. The exhaust is 3/4 coming out of that generator and he installed 1 1/4 pipe.
This same thing has been done by a few other people the exact same way, nothing new here, just using some ones else design
Tru enough but that can be saide with all of YT.
Let me provide some education here. Take a look at the dates those videos were created in comparison to mine... You sir have stumbled upon the originator that led to those copies... 😉
I have a predator 2000, if you can do this for me I’ll pay for shipping and for labor! I’m not good with tools :/
Sorry brother, I've been asked before and it's something I'm just not interested in doing, not do I have access to the 2000 model to insure proper fitment.
Never grind with a cut off wheel they are too thin, and if you grind through the edge of the wheel, it will fly off and hurt you
Scheduled power outage? Let me guess…… California?
Right on the money 💰..
Aye bro can you make me a kit please . I will pay you. Will it work with the 2000 watt predator inverter? I will subscribe also. Thank you brother
Hey MEO, Actually I've had quite a few people ask me to make a kit for the 2000 watt HF Gen/inverter and the answer is I can't since I don't have one to make a JIG for the flange setup. I don't know if HF is using the same exhaust muffler as the 3500 watt big brother. There are to many variables including mounting whole locations, exhaust pipe size, location of the exhaust exit hole with regards to the plastic covering.. If you don't get the extension pipe exactly dead center then it could touch the plastic covering and cause melting.
If I had a loaner Generator for a week or two I could make kits for sale.
@@TheChemistDIY sombody give this guy a loaner so we can start the bizness. Hahah thanks for the reply bro. I totally understand. Let me know if you do make some. God bless. Peace
Just buy a Briggs & Stratton 691893 Exhaust Gasket
Jacked me for 12 minutes of my life 🤦
Just 155.00 ? That’s expensive
Lol.. that phrase was " just under.. $55"
Don't do this, any leaks in this and you could slowly fill your home with carbon dioxide and not even know.
Yes, it would be wise to put up a carbon monoxide sensor to alert you if there is a leak. This is also required by law to have in homes in most states. If performing this mod for the use in an RV i highly suggest you put one in as well. Better safe than sorry
M
Seals!! This shits gonna shake loose in 15 min
Brother, if you can't figure out how to secure fasteners in place and keep them from backing out do to vibration then DIY and fabrication in general, is not for you.. let me educate you a bit before you attempt this and kill yourself.. it's called loctite and comes in two colors, blue and red.. one holds stronger then the other buuuut I'll let you do your own homework from here..
Thanks for commenting..
James Moreno' Just play some Ted Nugent / Strangehold or Turn that thing down by Cheech and Chong in the next video. Just Damm! for get those, Just play some Sleeze Joe' Guardian Angel loudest band ever, and if 'John 6:44' can't hear you? Post back, Sorry! John 6:44 i can't hear you, the music is too loud. Damm! humans love to bitch about nothing. Good job on the DIY.
Why the f... Do we gotta here that groovy wanna be music. I'm good with quiet. That noise you call music makes me wanna not watch this. I have my own music and I listen when I want. Not when I'm trying to focus on what your saying not on dancing music.
It's as simple and moving on to the next TH-cam content creators video that doesn't have music brother.. but I guess the build was so good that it made you stay and comment.
Thanks for posting your thoughts, I'll keep that in mind ..
@@TheChemistDIY Quite honestly.... I didn't even notice the music till I read the comment I had to go back and rewatch lol Good stuff I plan on doing this project sooner or later. Thank you
@@TheChemistDIY Just play some Ted Nugent / Strangehold or Turn that thing down by Cheech and Chong in the next video. Just Damm! for get those, Just play some Sleeze Joe' Guardian Angel loutest band ever, and if 'John 6:44' can't hear you? Post back, SOrry! John 6:44 i can't hear you, the music is too loud. Damm! humans love to bitch about nothing.
Too mich unnecessary work.
That was horrible
Everyones entitled to there opinion...