HOW TO Replace the Flywheel KEY on your Lawnmower with Tecumseh Engine (fix kickback problem)
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- เผยแพร่เมื่อ 7 ต.ค. 2024
- If your Lawnmower kicks back and is hard to start the flywheel key is probably broken and throwing the ignition timing off.
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@FatVsSkinnyShow u can get them on ebay or an auto store
quick efficient job as usual Don! I just had one that kicks back a lot. checked the flywheel key and its good. blade is tight. so i assume its a bent crankshaft or maybe the compression realese is messed up.
don't know if you added it in there somewhere but older Tec motors use a single mounting point (shoulder screw) on the starter housing. you must drain the oil prior to taking the housing loose....or you'll find a mess on da garage floor. fyi steel key is common to LV195 motors on the Toro Recyclers and some other later model mowers. the "L" shape key is common to quite a few Tec motors. fyi #2 pull spark plug wire initially and if you find the 'kick' goes away it's the f/w key.
Thank you for posting this video....I was going to roll the mower to the curb this morning... but took it apart and the key was broken. I'm off to the lawn and garden shop now!!
Thanks again!!
Paul.
@th19940305 it's going to be hard and something might break
thanks donyboy73 . mine won't start. tec. 6hp 2001 craftsman. i've replace dirty airfilter, cleaned carband plug. i put to much oil in it. but even before that it was hard to start when it was hot.
@Amopower yes you are correct, flywheels with a sheared keyway are usually harder to remove
@th19940305 there a knock off tool that you can use it screws on the top of the crankshaft you would screw it down till there's is about an inch between the flywheel use a large Flathead screw driver and a hammer strike the knock off tool while applying slight pressure with the screw driver and the flywheel will come off
you make good videos i like them
No I was ignorant to the fact that the blade needed to be installed before I tried to start the motor. with out the the blade the motor looses it's momentum and will kick back just as if it was out of timing. O7OUT
I am a 'broke'-chanic - when I try to fix things, I end up making it worse. Your videos are very informative and I am sure to learn a lot from your detailed explanations. Thank you for the well produced videos. Good job on the closeups and descriptions. You will save me a grass-catcher bag full of money.
Cheers!
Keep your videos coming. I'm a tinkerer. I learn a lot from your videos. Much Thanks
Cool video dude ! thumbs up !
@thumasta666 oh yeah, also checked the valve clearance it was good, so i dont know what would be making the noise..
@snaponjohn100 cancel your order immediately because this guy is working hard for us to share.
WELL DONE,,,
@pivotboy63 that is the OEM part for that mower, other tecumseh lawnmowers have an aluminum key
What is the approx. torque for the flywheel nut? Thx great video!!
Great video, solved my problem my lawn mower. Thanks.
@donyboy73 No problem !
Excellent video- wish all explanations were this clear. I sheared lawn mower blade key so I'm certain the flywheel key is sheared also since they are the same size. I'll just make another one out of a large bolt, by squaring off the sides with a file.
Also twisted/bent blade and shaft. Used a 3-foot C-clamp to bend blade back on mower. Straightened bent shaft with hard whacks from mini sledge. Taped toothpicks to blade & rotate for alinement. For Shaft used duct tape barely touching shaft.
Hey thanks Dony for the reply. I just needed a little confirmation that I wouldn't be totally spinning my wheels by going inside. Later Bro and Thanks again for all the great videos.
Okay after my nap I cracked her open and top dead center on the marks with valves closed and piston up but ignition point was about 20 deg. out sitting at not quite one o'clock. Valves seamed to be closed but piston was well on it's way down by the time magneto contacts met. Is this right?
yes it is, go to a small engine shop or check on ebay
What is the exact size of that key ? Thanks for respond.
@Amopower it's a 1/4' threads bolts
one question though ... isn't it neccessary to use aluminium keys on aluminium flywheels so it doesn't damage the flywheel next time it slips?
Donyboy , why do you never clean up anything before putting it back together???
@seasonedtoker for some reason this one is made of steel and an OEM part as well
Hey man. Right before I found your videos, I ordered a 5 DVD set from lawnmowermandotcom. It was $109 US dollars. They don't compare with your videos. When u r removing a part, u zoom in so close it's as if it is right in my hand. I wish that u made arrangments to accept donations. When u do, I will send a few bucks your way. I think that others would, too. Thanks again for having the best quality videos on TH-cam!!!!!
my lawn mower does the same thing but i dont have that tool to remove my flywheel what can i use to get it off? u can c it in the vid i sent
@killahhh199 this particular model uses the steel key, in my vid it is an OEM part
thanks for watching
Yes, in some of his other videos, he inserted a nylon rope into the cylinder via the spark plug hole to prevent the piston from moving in the cylinder. This will ensure that when you attempt to remove the flywheel, the crankshaft does not spin freely.
nice vid but i don't think you are suppose to use a steal fly wheel key because if it hits something it could break the fly wheel itself in half because the aluminum is much softer than steal.
@ringbolt9 usually replacing the keyway will do
DEAR DONNY WHAT IS THE PART NUMBER ON THE FLY WHEEL KEY
thats a smooth running tec! and looks sharp!
UPDATE: I just got done replacing the flywheel still have kick back issue. This is a 6.75 Tecumseh. Could I have jumped a tooth inside or something. this mower cam to me with a blade bent all to heck and a sheared key. The fellow said he hit a stump. I am out of ideas. O7OUT
Well filmed and well-explained
your videos are very helpful, I enjoy ur channel
Fantastic!! 5 stars. Great job showing the puller and tapping the holes. I am impressed at how u clean your mowers before u release them to the customer. U run a " Cadallac " shop. :-)
@snaponjohn100 @snaponjohn100 wow thanks. I do accept donations at my paypal account at donyboy73atyahoodotcom. a guy from Norway just sent me $50 the other day. it made me realize just how much people appreciate my videos
I HAVE A TORO WITH A TECUMSEH 6.5 HP ENGINE, MODEL LEV 120 WILL THE FLY WHEEL KEY 611298 FIT ON MY ENGINE. THE FLY WHEEL KEY THAT WAS REMOVED FROM MY LAWNMOWER HAD A SLIGHT ANGLE TO IT. I BELIEVE THAT WAS PART NUMBER 611004. I SHOWED IT TO PEOPLE AT ACE AND HOME DEPOT AND THEY THOUGHT THERE WAS NOTHING WRONG WITH MY FLY WHEEL KEY YET WHEN I ATTEMPT TO START THIS IT STALLS OUT AND THE HANDLE PULL ROPE SNAPS BACK. IS IT POSSIBLE THE EXISTING KEY THAT I REMOVED WAS THE WRONG KEY OR IS THERE A VALVE LASH PROBLEM? PLEASE NOTE I DID SEE A TINY BIT OF BLUE SMOKE AND THEN IT WOULD STALL OUT. THE SPARK PLUG DID NOT LOOK LIKE IT HAD OIL ON IT. THE LAWNMOWER MAY HAVE BEEN TIPPED ON THE WRONG SIDE CAUSING OIL TO LEAK INTO THE AIR FILTER AND MUFFLER.
no, it says do not use steel key. you will destroy the crank, and the flywheel if you do not use an aluminum key.
i dont think your supposed to use a steel key cause if he hits a stump or something the flywheel could split in half. at least thats how it is on briggs im not sure if tec is different
The key on my old v60 is an odd shape, thinner on one end. I don't know which end goes up.
Great! Thank you for taking the time to teach us.
make sure you are subscribed
whats the diameter of the starter rope
This was very helpful.... Thanks
I have a HHD7250 Hyundai generator and the flywheel has a broken fins cover. Do I have to buy the entire flywheel?
I believe so, if only a few are broken I wouldn't worry about it
@IPCZX thanks dude
it's a #4.5 rope, not sure off hand the actual size
I'd like to see a re-take on this in HD like your new vids !
yes for sure!
@thumasta666
I had the same problem when the shear key broke on my Craftsman. You should definitely have a look at the key.
usually a new flywheel key will fix it, it might be like u say though, i would check inside
@donyboy73 oh i see
Is it still possible to buy tecumseh keyways?
@nckcanna people come to get their mower and can't recognize it
magneto upside down?
you can buy universal rope from autozone that fits briggs and tecumseh.Ive found that often the best way to instal a tecumseh rope is to drill a hole to the left of the hole the rope goes through already, turn the recoil reel 8 turns to tighten the string, feed the string through the new hole, and into the hole in the recoil reel, tie a know with your free hand, slowly let it wind in, then work the string into the hole its supposed to go through. then put the handle on, and put it together again
You are the very best I've watched so many videos and you just are the very best, i'm in love :-)
thanks lol, make sure you're subbed!
Can you tell us about the red mini bike?
I have used a brass hammer to loosen the flywheel, a little pressure underneath helps too.
@1972FordF150 thanks man
I bet that crank shaft bent a few microns.
Are flywheels always hard to remove, or just the ones where the key gets sheared? I dont think I ever had to pull a flywheel off where the key wasnt sheared, but my guess is that if the key isnt sheared, the flywheel may come off alot easier.
Donyboy
Who is or was your favorite engine maker and why? Briggs, Kohler or Tecumseh?
why didn't you tap in the key on the fly wheel?
@visitpowertooltech r u a powertool tech by the way?
@MitrBnsdrty you're welcome man
might be a loose coil or something else
If you haven't solved this yet, it could be a sheared key on the blade adapter. I had this happen to me, after changing the bad flywheel key it still kicked back. I found that the blade adapter was slipping.
I need to replace the flywheel key and am wondering if the craftsman 87677 and snapper 10783 the same part, just different part numbers or are they completely different?
Okay so where do you get a flywheel puller?
For a Tecumseh, use a harmonic balancer puller like the big boyz . The Tecumseh will have 3 holes at 120 degrees apart. For a Briggs, you can get a puller from Briggs, a Briggs will have 2 holes.
Okay thank you
You can get a flywheel puller from Autozone or O'Reilly's on loan by giving credit/debit card, use it and return it in good shape at no charge.
Thank you!!!
thanks for great vid always helpful , BUT I've change the keyway drained all the oil and refilled it . and it still kicks back what else can it be ? also change flywheel too .
Do you have the right key in there? No gap? Why did you change the flywheel?
UPDATE: It's a solid one o'clock out (looking at the fly wheel and magneto) maybe a shade more but the kicker is it fires again on the up stroke the next time around at the same 20 deg difference (looking at the connecting rod and crank). You reckon I got that key in bass ackwards? Thanks Dony. O7OUT
hi db73. Is it possible to convert gasoline engines to run with wood alcohol?
Do you know if a Honda Hr214 engine will fit on this same deck?
timing is supposed to be 20 degrees advanced (22 on a briggs), and the "magnets" on the back side are actually just iron weights to balance the flywheel, without them itd vibrate alot
Hey Dony great vids I really get alot out of them and if I have a question or want to see the process I always look for your videos first. But tell me what else can be causing the kick back when plug wire is on. I have changed the key three times even tried it in upside down(does tapered end go up on L shape keys) and the kick back still occurs. It's really starting to hurt too. May I got something wrong is there anything I should look out for. Anything would help.Thanks for the videos.O7OUT
@donyboy73 thanks. Do you have any advice on what size bolts to use to thread into the flywheel? I have already stripped the three pre-cut holes (the puller pulled the bolts right up through the threads the bolts made). Same thing happened on three new holes I made although I got the flywheel off. I bought a new one so I want to make sure this doesnt happen again. Self-tapping screws? size? probably depends on the model, i have a tecumseh 6.75 toro. thanks
Do riding mowers have flywheel keys as well? I hit a rock with mine and now the engine sputters when I turn the blades on.
good vid I had suspected the flywheel key on mine tried to rip my arm off almost every pull its a chini clone of teccumseh my fly wheel has the starter cup cast in one pc with the flywheel
pop the head, and check the valve timing, and scrape the carbon off the head, it could be preigniting
I've followed your tutorial here, but I'm still having a hard time pulling the starter cord. It doesn't pull smoothly and is lumpy. I've taken the blade of the mower off and replaced the flywheel key, but the cord is still hard to pull when attached the the flywheel and the mower still wont' start. Any ideas?
hes lucky he didnt bend the shaft
@visitpowertooltech thanks man
my flywheel key is in right position but is still hard to start also changed diaphragm in carburettor please help me ...
I thought I was pretty good on working on this crap. But I have one that has got me stumped. It is a Tecumseh LEV 120. It was not running when I got it. When I pulled the cord it sounded like someone had put the coil back on but did not gap it. And it was spinning over but hitting the coil. So I take the cover off and spin the flywheel over by hand and there is no knock. I went ahead and gaped to make sure. Put it back together. Pull the cord and its knocking again. So I take it back apart and changed out the timing key. Did not think that was the problem but who knows. This time I took my ratchet and socket and spun the engine over as fast as I could and no knocking sound. I put it back together. Pull the cord and it's knocking again. Does not sound like the blade but I checked and there is no hit marks. I went as far as to get a new blade. And again it is knocking. So I pulled the spark plug out and pulled the cord. And there was No knock. I put the spark plug back in and it knocks. I am thinking there is some thing wrong with the valves. I take it apart again. But they seemed to be OK. Made sure the gap's were in speck. And cleaned them up.
Now i have to get a new head gasket.
I went back to look it over and think. I got a hold of the flywheel and lifted up like I was going to take it off. And it moves up and down about the thickness of a nickel.
I think that is where the knock is coming from. Is this a seal issue or something else?
I do not ever recall seeing one that moved up and down like this.
Anyone got any ideas ?
William Wynn sane issue you ever fix it mine rips the rope back I got it from a neighbor that got it for free it’s a craftsman eager 1
where do you order Tecumseh parts from? Isn't Tecumseh out of business? I need a air breather cover. Pro Parts Direct can't help.
check www.discountonlineparts.com
if my engine is getting stuck could it be the key
I feel the kickback,my arm is so sore,,,If I get her to start she will run for a few minutes and dies,,never start when hot which also lead me to thing about the magneto
It would be a just a coil post 1983 (electronic ignition). Magneto's had points and were behind the flywheel and consisted of 3 working parts, condenser, coil and the point's. Some even had the magneto behind the flywheel and the coil outside the flywheel, which was even more work. Anyone of those 3 parts could have gone bad in the past. Now if the coil goes bad it is just one part and you always know what. They are on the outside of the flywheel now and have become very cheap with all the aftermarket coils that are being made in China and flooding the market now. They are much easier to diagnose and change now. If the engine stops after a few minutes once it has heated up, it is the coil, the coil goes bad and will not work at high temp's, it stops giving spark and the engine shuts down. Change it. You will not have to remove the flywheel to change that any longer, if it was built from 1983 and on. You will have to remove the flywheel to change your flywheel key. That should be done right away, because besides the kickback you feel, your engine's spark is no longer properly timed and the engine will backfire, run poorly, etc.
well, I came across one that uses a steel key...but the steel key is narrower than an aluminum one....I retract my previous statement about never using steel keys.
Never use a steel key unless its recomended
lol, yes my mistake
@snaponjohn100 thanks man
how much for that USD
The thing he's replacing is the key. The keyway is the groove that it fits into.
Don't try to order or purchase a keyway. You want a flywheel key.
when does a tecumseh not have a problem? LOL