Remove a Generator Head & can Engine be used in Go Karts?
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- เผยแพร่เมื่อ 5 ก.ย. 2024
- Can you use a dead generators engine for a Go Kart or other purpose, find out what you're up against. Also how to remove the generator Rotor. Then watch me grind the crankshaft down without removing it from the engine: • Tapered Shaft to Strai...
I used a 1/2-13 tap and bolt to remove the rotor. If you don't have taps your can buy a basic sae/metric kit like this one amzn.to/2r2X9fm for pretty cheap or just a single tap amzn.to/2pHVnw2 .
I used a Craftsman Strap wrench to hold the rotor from spinning amzn.to/2r2ug2Y
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if you check the parts manual for the engine itself (not the generator) you will find that this engine has 3 part numbers for the crankshaft. They just put the crankshaft in based on what it is used for. They are keyed shaft, taper shaft or gear shaft. They are a little pricey though, and you will then have to change your gaskets after opening the engine. Not sure if its worth it or not. I guess it depends on the shape the engine is in.
Does predator harbor freight engines have tapered shaft? My tecumseh was only 10 hp
Harbor freight has 8hp or 13 with electric start.
@@MC-hs4mf I would never buy an engine from harbor freight. They won't last nearly as long as the name brand and it personally I think they're garbage
@@kwacz Briggs these days have bad reps, Tecumseh is no longer made. The shops wouldn’t even attempt to disassemble this generator.
@@kwacz how do I buy a “new” Tecumseh HM100?
@@MC-hs4mf northern tool has them. Youd have to make sure that it has the tapered shaft if that's what you need. Any small engine repair shop should be able to get you what you need to replace that engine.
It can be done. While the motor is running, I used a grinder then a file and ground the shaft to fit a hydraulic pump and used it for a log splitter just a few years ago.
I figured someone had to had tried it out. Nice work.
sixtyfiveford
Gen guy here.
What ya did works fine.
Briggs makes a kit so I can do the home standby ones in the field.
But on these little peashooters you have another option.
Support that rotor slightly from underneath with a jack and a block of wood (plywood transmits the force nicely)
Then take another plywood scrap and put it on top of the rotor.
Whack that sucker with a good sized hand sledge hammer and as ya hit it, sorta put a spin or drag across on the hammer.
This will work if you are careful and need to reuse it, but the strike will kill the magnetism for sure.
No biggie to fix that though. but if it's going to scrap you don't need to be so careful, just support it good.
That's what I did with a 8hp generac motor just ran it with a drill press and shaped it to my size that needed for the clutch assembly. Worked flawlessly.
What I call the poor man's lathe. Using drill with grinder and files .. ect . Using different type disc and feathering disc. It can work fairly accurately. .
To remove the rotor, gently tap it with a rubber mallet. You may need to rotate it a few times while you tap it. There is no need to extract it with a bolt.
this is true
Most appreciative! I recently picked up a nearly new and pristine Westinghouse 9500 watt for $150. The gamble? According to the previous owner, the engine was locked up and it had sat for two years. The thing had no dust on it. I figured I'd take a flier of a chance at the price and pray for a hydrolock issue. Sadly, the cylinder is fine. It must be the rod/crank in a very strong embrace. I'm guessing it was a power out purchase and someone started it without adding oil.
I've got everything off the chassis except the engine and gen head. I ordered a flywheel puller of eBay. For $20, it's not worth the effort to build my own in the shop. I still need to get a M12x1.75 bolt and come up with a shaft to push the rotor off.
Once inside, I'll know for sure what the damage entails
Those tips work just fine. No need to machine it any better, just make sure engine is hard mounted so it wont vibrate, remove bulk with poverty lathe/grinder, put long bolt on the side so you have hand rest and fine tune with file. Measure the diameter often and spray some water into axle every now and then to keep it cool so crank seal wont get damaged. That should be plenty good quality for go cart or other pulley driven system. For variator with larger diameter there might be some vibrations, but probably nothing major if its done accurately enough and with patience so it wont become uneven or oval. If you want bigger and wider axle, yes use the peace from the core, cutting extra off and pulling it into place with bolt, when its grinded to size make couple holes and with wet rag on the saft to keep it and seals cool, couple quick welds to secure it into place just to be sure. Alternatively new bolt should work too if welding is not a option.
Start it up and go to town measure a million times
That was a nice sized generator. Too bad the generator head died. Great tips for repurposing the engine.
Thanks.
I've never had a reason to pull a generator off an engine but now I know how to do it. Your a very talented individual!
Thanks Man.
Not bad, you can also just put the shaft bolt in, do it up and leave a gap of 1-2mm between the bolt head and the rotor bearing, then gave the bolt a couple of taps with a ballpein (Engineers) hammer. The taper fit generally just pops off
You're videos are so helpful. I picked up a used generator last year. Motor is locked up and really haven't had time to take apart. Really haven't decided if I want to rebuild old motor or change motors and wasn't sure how to take the generator head off till now. Keep the vids going. Helped out with my snow blower carb and points. Still didn't it tuned right but it did run.
I generally pick up these with good motors and bad generator heads for free to $50. So it is generally less work for me to put a different engine on, than dive into the original engine.
Anyone in the Austin, tx area? The company I work at is selling all their old 6.5hp motors and non working generators on CL for cheap. I bought a 6.5 hp engine for $10 and got a second one free. Most are missing the carbs and air filters. I do a lot of work on the newer equipment but have had to do repairs on the old generators, pressure washers and air compressors. Only the gen motors have that tapered shaft and the rest are keyed shafts. Check to see if the ad is still up on CL
Good stuff Bud!! I think you might have just thrown down the gauntlet for Roadking and the Crew!! We come across them engines all the time!! Now we gotta get one and make a functional crude shaft eh!!☺
Heck Yeah.
805ROADKING hey roadking, big fan!
Thanks Bud!!☺
You can buy a clutch that has a #41 sprocket, with the amount of teeth you want, or a 4L V-belt pulley, that fits the taper shaft. I "think" it is made by Max Torque. The around the $50 to $80 mark. I have bought them in the past, to use on generator engines, that I put on mini bikes. You can find them on eBay too.
Yes, I've seen the adapters. I think they're a little on the pricey side for what they are.
Alot of times when the generator isn`t putting out you can take a hand grinder and spin it plugged in to add energy to the feild windings and get it back working.Which you may already know.
Yes. This one was a crispy critter.
Saw a guy tread the end then fill with water, Teflon tape bolt and it popped right off. If you have to keep it horizontal pump it full off grease if a rod isn't handy and tighten up bolt, similar to how I pop out the input shaft bearing on manual transmissions
My Coleman Devilbiss powerback generator was different . The 4 long bolts only had nuts on one side and threads of not to other side. It may have messed up threads by using a tool to grip threads on the end closest to me that held nuts.
And when I put a rod inside and screwed in a boot after creating threads the bolt broke so I had nothing to lose and tapped with a sledge and immediately fell off shaft. I had already tried a rubber mallet.
Now I have to go from opposite end and drill an extractor also broke in bolt.
Way back when I was a teenager I worked at a Lawn and Garden Equipment shop. I worked on those Generators all the time for Home Depot.
Generators are a finicky thing.
Didn't know how those generators coupled up so thanks for that. Handy to know.
Thanks for watching.
I don't guess you happen to know if that's the same tapered shaft on a 32/4000 Watt generator? My brother wants me to help him put a motor on his Predator generator and I didn't know how those things coupled. I mean everything I'd ever coupled together was on a lot larger horsepower electrical motors.
One thing thats not mentioned is that the output shaft from the Old gas Motor has to have either the Bearing & Housing off the old gas Motor "OR" a Block Bearing so that the Generator Armature can stay exactly inline > I have used the whole crankshaft with the Gas motor housing to insure the Generator Stays perfectly straight as it was when still attached to the Old Gas Motor . Thanks for the Video !!
Thanks, I'm glad you liked it.
I don't think it would be as crude as you might say if you took times patience and use proper tooling. I'm in the same dilemma I'm glad your video explains how to get this rotor off, I was going to use the 10 horsepower Subaru engine for a mini bike
i like the grinding it with the motor running. and cut/file your own key way
I picked up another motor the other day that I'm going to do just that to it.
I was just thinking that LOL easy peasy
Made a bushing for the Cushman motor, od was 1 1/4. Like you said not practical for a go kart app tho. Always neat to see what you are getting into, being able to re-use things instead of discarding, a great $$ saver!
Thanks.
Great vid Moe ! I use those engines all the time , I like to use the gen rotor taper as a start and go from there on the build I am doing .. Thumbs up man !!
They're great engines that are generally pretty cheap to pick up.
It can definatley be done especially if you have a lathe which I do. I may just turn down the shaft or I may machine an adapter which seems easier however I have to remove the govenor and I don't remember how much I need to dissemble but it depends on how much work to remove the crankshaft.
Mine is a 3/4 tapered to 5/8 I can turn a 1 inch sleeve and press fit it on with a 1/4 inch of material removaed so after it is pressed in I can tig weld the original shaft onto the sleeve and the other half of the part would be solid with a keyway and a tapped hole. Well thats the theory it doesn't seem so hard.
Great information! I have 2 generators with bad engines and I got to get at least one of them working and that is a big help for separating the engine from the generator head.
Thanks, I'm glad it was helpful.
Love your channel by the way. You've got so much good information and interesting tool and project ideas. My harbor freight tire changer is so much easier to use with my copy of your tire changing bar.
Could you thread a short bolt into the original tapered shaft tight enough to hold a pulley centered and then run a weld around it to make it solid?
Sound like it would work.
You can get the aftermarket 11HP crankshaft for under $75 and then sell the tapered one the tapered ones are more expensive. That is probably the easiest way to do it from what I can see.
That's a good point. I don't think anyone would buy a used tapered one. Seams there are ten fold more generators with dead electrical heads vs engines.
The cvt clutch from a golf cart or gator engine also uses a tapered shaft. Not sure about the taper lengths for a easy fit.. another consideration. Is tractor supply outlets have all kinds of shaft adapters , sprockets, pulleys. Ect. So even if the shaft needs to be larger than a go karts 3/4" u can Adapt to a farm sprocket. Then use a piece of 3'4" keyed shaft with a pair of bearings and mounts. To make a jack shaft with another sprocket to work with the motor on One end and kart clutch on the other.. ..
Those tapered shafts on golf carts etc are a completely different taper. Generators have a unique taper style though you can buy adapters, They will run your $75-100+ which generally defeat the purpose of using a second hand engine.
I thank you for breaking it down and being descriptive it's much appreciated bud!!!!
You bet!
They have a conversion for them now with a final shaft size of 3/4 inch just for this application
I’ve fabricated something I call a clutch more of a brake but I utilized the threaded tapered shaft cut out part of a gear for chain sprocket for bike basically wasn’t perfect but it spun chain nice wich spun the “rotor” and the “clutch” only engages like a brake so it wasn’t easy to drive or wasn’t easy to get used to and wasn’t very efficient however we had fun breaking it and the clutch setup actually lasted longer than the brake pads it blew through them fairly fast once you had brake locked up you could redline engine and get moving wasn’t great on take off as far as fast or putting power down but over engineered backyard go kart using that generator was fun for me to make however I broke it a lot faster than it took to make i fabbed the whole thing wich was the downfall lol my steering aparatus was obviously not great that was first to go and only had front brakes and a metal tire brake in back since it was impossible to put on the wheel or shaft
I use a pry bar on the bottom and then use air hammer to pop them off...been doing it that way for 40 years...however I like this method.
i got a free generator with a sweet running 7hp subaru robin engine. i got on ebay and found a straight 3/4 shaft for the same engine, 25 bucks delivered. not saying that there is straight crank shafts for all genertator engines but its atleast worth the look if you got one for cheep
Thanks, Moe. I'd heard these engines were hard to convert from a tapered output, but I bet using a grinder while the engine is running might just get it close enough for government work.
Very True.
A LeBlanc then finish it of with a rotery sander as it runs then fine emery wet and dry i did this to mount a cog to run a chain on a old garden dumper cart that had a bsa 175 bantam 2 stroke in it set in a 2 gear box f / r i lost rev but its working 4 years on .
Here I was, about to ask if you could just tear the rotor apart and make your own adapter... And you went and said it. Great minds!
Heck Yeah. I've never seen it done, but I don't see why it couldn't.
Now that was very helpful ! I've worked on generators before but not to that point, so I think this information will be handy.
Thanks for sharing and take care.
It's never good when you need to go this deep. Thanks.
If you want to make a go kart with that weld a gear and connect it with a chain, it's a good option.
Nice video. I feel dumb now but when I got the notification I thought you were talking about a cylinder head lol.
Now that you say that, it's all I read in the title.
I have a Honda engine running a compressor. I ground the shaft with a grinder with it running it is crude but works.
That's awesome. I knew someone had to have done it.
Yes several years ago because the electric motor on the compressor was junk and the generator was junk too.
Great video and glad I came over, just got done watching a video of Zippos and he asked people to stop by and check out your channel and I did and subscribed great Channel.
Thanks Matt. -Moe.
Thanks for this, should be able to get the end part of the genny off now to replace one of the seals thats leaking :)
Thanks for watching.
Good video that gets right to the point, no bullsh^tting around like 90% on here do! sixtyfiveford! Right on bud! BTW, when I tapped my rotor for the puller bolt, it was a 7/16-14 NC thread. I'm sure most of these rotors that aren't tapped are probably the same ID. Carry on!
uggg. i need the opposite.. ist the motor thats dead. i need an adapter for the power head side.
I'm trying to figure out if I can use a Gen head off another generator on my diesel generator motor? I've got a couple candidates that have bad motors but their gas and so I'm wondering not only if they'd fit but if theyre built differently than the one on the diesel engine since it seems to have lower rpm
Thanks for the info,you must have pulled a few of these apart.
It's never a good sign to have to got this deep, but it does happen more often than I would like.
I'm wondering if it would be practical to get a pulley machined inside to with that tapered shaft. The tapered shaft is an excellent connection.
If I had a lathe that would probably be my first option. However, spending a little more time to do the engine shaft gives you more versatility in applications and changing pulley sizes.
As a machinist, no. I wouldn't waste my time cutting that pulley for myself. I've lost count of the number of straight shaft engines I've bought for just a couple bucks and put back into running condition in an hour or less...often without spending any more money. Lots of stupid people in the world throwing out perfectly good engine powered equipment because it won't start or doesn't run right....or it just isn't new and shiny anymore.
I have no idea why people keep trying to reinvent the wheel. By the time you get through paying a machine shop, you could have bought an engine...or at least a new crankshaft. Doing it the halfassed way with a handheld grinder/file/whatever ends up with halfassed results, and you will never have a standard crankshaft. In addition, if the engine is used to direct drive a pump(hydraulic or pressure washer) you will very likely beat the keyway out of the shaft and pump bore due to a piss poor fit between the two. This will also ruin the pump.
Great info! Would that have the same taper as a snowmobile clutch?
It's been a while since I've torn apart a snowmobile engine, but I believe its shaft is larger.
Thank you, excellent job. Can you switch out a Harbor freight Predator engine or other comparable engine to fit the shaft without too many headaches ?? Machine shop okay....
I wonder if the center of a motorcycle magneto flywheel would fit that taper.
They are often rivited on and perhaps could be fitted to a plain pulley.
That's a good idea.
This is an old issue eh!!! (CAN) my friend. Thanks for bringing it forward.
Thanks Mate.
They make dozens of adapters now for all different sizes or you could change the crankshaft 20 minutes.
Great video. Very informative!! What goes bad on the generator head that creates this type of opportunity?
The windings short out due to overloading the generator.
Such great lateral thinking. I love it
Thanks
My Simplicity Baron is driven off the flywheel side, I picked up a 18 hp Robyn Subaru with tapered shaft for cheap and set it up to run off the flywheel. 14 years and still running strong!
Why not make a plate to bolt on the flywheel side with the appropriate shaft welded to it.
Only more robust engines were designed to have a flywheel PTO. Most of these generators have aluminum/plastic cooling fan flywheels that'll never handle a flywheel PTO. My Simplicity also runs a flywheel PTO.
Hey guys i need some help. I have a engine that came off of a briggs and Stratton generator and i want to use the engine on a go-kart. I have it mounted on the kart but when i start the engine it runs at high RPM. how do i make it idle?
Great video. Thanks. I have a Generac gn220cc 4000xl portable Generator. I removed the gen from the motor the same way that you did. I noticed the shaft has a keyway slot in it but I never saw a key and when looking down the gen head I don't see where it would have a need for a key. Do you know if I need a key for the shaft that the gen head goes into when I put the gen head? back onto that shaft. Thanks John.
I've never seen a generator require a key. They rely solely on taper compression to lock the rotor to the shaft and ensure it's perfectly centered.
Thank you. Very much appreciated. Keep the videos coming.
How's it going convert mine generator motor using a torque converter clutch and aluminum pipe I picked up from the hardware store at about a 1in OD and .8in ID then tell me a couple washers and a bolt short enough to go in there tighten the hell out of it and it work fine for me so like he says a new video there's options
Is that by chance a 1:10 taper shaft?
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bearing do go bad and there would be an oblong shaft a machine shop can make an adapter to fit and i liked your video just make the frame and idle pulley a little different
So here’s a question, I just received an electric start diesel generator with a bad motor and I have been trying to figure out if I can simply replace the motor with any other motor or does it have to be a specific kind of motor?
It will need to be anther taper shaft motor from a generator.
My Idea would be to make a fixture to hold a lathe bit .....or a tool post grinder .and machine the shaft with the engine running
I was thinking the same thing last night. There are always 4 bolt holes on the back of the motor that would support a fixture.
Pure genius, thumbs up Moe
Thanks Man.
My engine slung a rod and I want to replace engine. How to get engine and gen head to reattach?
@@MC-hs4mf Just tighten the small long bolt down. Doesn't take much. Probably only 30-40 foot pounds. The taper on the shaft locks in super easily.
Or If you know someone with a lathe, they can turn an adapter that sleeves on there and use the original bolt to keep it on.
Could you add a pulley at the end of one? To use other accessories?
Not removing generator
Possibly yes. However generally there is very little shaft to attach a pulley to.
@@sixtyfiveford I wanted to add a pulley for an air compressor on an old generator I have. Might take some machining. Might be better to just use an alternator as a power supply. It would be easier to achieve both.
How do you wire the generator run after disconnecting from the stator?
Could you secure the engine....set it up like its a lathe with a tool rest and turn down the shaft???
I don't see why this wouldn't work.
Would welding a pulley to the shaft work to?
Yes.
The three wheeler or four wheeler and use the engine out of it for a generator very simple to do or farm tractor for a boat engine or generator cheap all you need is cheap fuel Willie Nelson gas
You didn't cover the electrical side of things....how are you going to get spark without a stator since the huge generator stator is now removed?
The generator head has nothing to do with engine spark/ignition system.
@@sixtyfiveford Gotcha, thats awesome! I have a 19hp B&S 570cc twin that I just pulled off a generator a few minutes ago after watching your vid, and you're right it runs and is self contained. I was worried I was going to have to buy a separate stator and cdi,so this is good news. I'm building a snow bike with it with a snowmobile CVT. Thanks for the vid!
So can this be converted into a pressure washer as well?
Hey how can you use the generator with a battery and DC motor? Can you repair the generator and connect a DC motor to make it electric generator instead of gas engine?
Why not just take the engine to a machine shop and have them machine an adapter w/a taper id and a straight od?
You could, but it would set you back over 100 bucks. It would be cheaper to pull the crankshaft and have it machined down for 50-75 bucks.
What if we put a driveshaft straight on the shaft?
Neat trick. I believe a ski do clutch will fit on that
I think it may be smaller, but it's been a while since I've torn down a snowmobile.
I can't seem to get the cover part off. I've taken out ever bolt I can find but it still won't come loose. Any idea what I can do?
How about casting an adapter with babbitt material?
I would think it would be too soft.
Just use a grinding wheel on an electric drill and grind it down with the engine running... then use a cutoff wheel to cut a keyway in (engine not running)
No..... Bolt the engine down , using a grinder start the engine and while it turns cut the shart to about 3/4 until close. Finer file and paper. I know it works.... did it twice.... easily done.
What if i don't have internal bolt ? Do you have some experience in that case ?
I havr a wood chipper i havent taking the engine off yet and a push mower (flat head) with a vertical shaft, i know u can make a generator with the lawnmower, but can i incorporate the wood chipper motor or somethong to build me a go kart? Looking for ideas please help
The wood chipper will have an ideal motor for a go kart.
sixtyfiveford wont need to do all that extra shaft stuff? Is it horizontal already?
thank you for helping me in fnformation about removing the motor
I've used a dead blow hammer and hit it side to side and it will come off after the center bolt is removed.
It gets it done on a lot but not when they're this tight. I would have bent the crankshaft or damaged the rear bearing with this one.
Nice video. Are all generator engines crankshaft odd size?
Yes, they all have tapered shafts to help center and hold the generator head.
I hate wasting stuff that still works.
I’m not an environmentalist, but I don’t think we should be throwing away things that can still be used, so I love it when things can be repurposed and used as long as possible.
Nice vid very informative 👍
Thanks.
Ok someone probably already said this but as far as machining the shaft just start the dam thing put a grinder or better a file to it
Is it the same for pressure washers?
yes
Every pressure washer I've torn apart has a standard 3/4" straight shaft with a key. They make great engines for Go Karts, Tillers, etc.
No pressure washers are not tapered..
Goomer Nope all the pressure washers ive worked with Do NOT have tapered shafts in fact i have a gx160 and a gc160 that were pressure washers sitting in my garage that run great and do NOT have tapered shafts
i wouldn't bother with a keyway. just grind a flat spot and use thread locker on any set screw.
What about the electric motor?
Can we use that in an EV Go Kart?
where the windings burnt? if not ether the avr or brushes where bad and some times they need to be flashed by using a drill and make a crank handle and chuck it in and crank it and lot of time it will bring it back to life!
Yes, the windings were char.
sixtyfiveford "Crispy motor!
Maybe weld a small plate with hole onto shalf , then bolt the sprocket onto that.
That's a good idea.
Thanks for the information
Could I use a tie rod fork to get it off
I find a pickle fork tends to do more damage than good but I have removed them before with one.
I have the 14 hp generac genset 7000watt , 15 years old and bullet proof. When it exploded off the shaft I thought for sure something was broke. LOL
I've been servicing this one for a neighbor for years. He's logged 5000-7000 hours on it since 1999+- so I think he got his money's worth. It's definitely been a great unit.
Grind the shaft with a grinder and make to usable
Sorry to hear that I just found a free generator.
Still looking for alternative uses but it might even work as a generator. Doesn't look like go cart will work for me.
If there are no threads on the outer end of the armature, pry outward on the inside portion of armature and hit the pin inward with a hammer. We could not find a video for if it doesn't have threads!
Good info.