Briggs Plastic Cam Gear Completion
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- Опубликовано: 15 окт 2024
- This shows how I transplanted the cam gear for the trashed pick Craftsman Briggs and Stratton 7.25 HP mower.
Here are the 3 Videos leading up to this one
Trashed Picked Mowers
• Trash Picked Mowers
Broken Plastic Cam Gear
• Briggs Plastic Cam Gear
Plastic Cam Gear Donor Motor
• Briggs Plastic Cam Gea...
805 ROADKING 'S Channel
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Zippo Varga 's Channel
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I work as a construction foreman, but I collect free mowers and stuff all year and repair them in the winter when construction is slow. Come spring I'll have a couple dozen that go QUICK. Your videos have helped more than once for this hobbyist!
Well i do the same thing.
It surprises me what people throw out! So far this summer I've fixed two push mowers, and have a snowblower and gas snowthrower to fix, all give-aways! It's nice to watch a professional work, without being underfoot! Thanks so much for doing these!
Well I am not a pro but I enjoy it.
You are a professional to me, I enjoy your well made videos, you are good at what you enjoy, that's professional enough for me! Thanks for sharing your knowledge and experience.
I watch a lot because I love to see new and different ideas. I’m 75 years old, your never too old to learn . You are very clever and do great work. I too like working on these little rascals. Thanks.
Thanks Larry
It's Finished...I don't have any parts leftover !!!...That was a great repair and video on an engine I would have gave up on and never would have thought about the plastic cam
It was interesting to me too.
First time I seen the inside of the crankcase. I always wondered about the governor mechanism, and that Plastic Cam gear with those matching timing marks and its interaction of those valve stems against it. I can do it! Thanks Bruce, you did good!.
Well my son took the top shroud off and the flywheel key was sheared. So he had a spare and installed it. The knocking noise ended up being a loose blade. The blade adapter key was sheared as well. I welded a new piece of key stock in the blade adapter, whacked the crank back to somewhere near right. He put it all back together and it runs as new. Your vids helped,, thanks.
Glad you gave it a try
Nice, job Bruce. I wish I could keep my shop as clean as yours. I have never actually seen the B&S puller for the flywheel used. That mower should have a full life ahead of it.
I am using it for a few weeks before the future owner picks it up (to make sure)
I've got one now that had a broken crankcase sump, so i found one at my instructors business and swapped it over. replaced the gasket and now it's giving me fits. My instructor said that it may have moved it out of time, but now you have me thinking about the cam gear....the other day I just wanted to see if it would crank and it did. I shut it down and was doing some other things and i'll be darned if it wasn't starting again....
Dear Bruce, thank you so much for all of the vids that you post. Your vids really cheer me up and I like your relaxed presenting style. I watch them over and over again. Thanks again Bruce. Paul from UK.
Thanks so much Paul. You made my day.
I cant explain why but your videos are so soothing and uplifting to watch it makes me feel like i can do anything. I need to replace a crankshaft on this exact engine and this was very helpfull. You seem like the most wholesome nicest person, thanks, great videos.
Best of luck.
That's exactly why my kids gave me the 'Zombie Dave' moniker. When you bring one back from the dead you called it a 'fun little project' but I know the feeling and I call it a 'Man Victory'. I could see it on your face in your closing of the video. Self Pride is a great thing. Hope you had a celebration beer on the day it started up. Great Job!
Thanks Zombie haha
As Hannibal use to say from a-team, I love it when a plan comes together, awesome job man.
Thanks
A mower video! This was fun to watch, instead of all looking at all the snow still outside at the end of March. Really interesting series, Bruce. Thanks!
I think a mower video next week. they are starting to come in despite the weather.
Excellent work on the mating surfaces my Friend! And great to see you found a bale clip up North! Handy things!! Check your in box for a PM. Great save with the junk yard Mower!! Cheers! Sean~
OK will do.
Great job Bruce...I'm glad you did this one as it was a perfect candidate for this fix. Just one observation if I may...the blue coloured compound on the bolt you were talking about is not an RTV, it's actually a thread adhesive called Loctite which is used to stop the bolt from working loose. There are a few types but usually the blue one is a semi-permanent adhesive and the red one is a permanent one and a PITA to remove. en.wikipedia.org/wiki/Thread-locking_fluid
I thought it may be loctite (really I did) but i am sure the RTV will seal as there was still a bit of blue left on the bolt. Thanks for the comment appreciated.
I do know that but I used RTV on top of it. It worked. It may have worked with the old Loctite without any more.
Your video was a big help, I'm swapping cams today on a Briggs and Stratton
Are the 2 cam gears different as in position of he lobes to the timing mark? If yes then you are on the right track. Sorry if you have already checked.
Hello Dave, This video hits the spot. I've recently dug out a Bob Cat push mower with a B&S motor circa 1986 by engine code. The deck looked wonderful as a sensation style cast aluminium, with a pulley drive. The motor is a 4 hp with a PTO. Looked interesting, what a mess. A bent crank, straightened it with a 6 inch 2x4 block and a 5 lb maul, next no spark, so a new magneto, when I got spark, vapor from the carb, checked the key-way, good. Now, to find the time to crack open the case, a good possibility may be a similar condition, thanks for the clue. Looking foreward to your next mechanical adventure.
Good luck. It is Bruce by the way but no issues.
Must be the Alzheimer's, it's tough getting old. Ha, Ha, Ha!
All is well. I put 2 wrenches down yesterday and it took till 2 pm today to find them on the ladder edge where I put them.
I ordered a 3" Two Armed Wheel Puller, in order to remove the blade adapter, and I see that the shaft protector is cracked, but not all the way thru, maybe I can have it welded locally. Too costly to replace, $208.00.
Good luck
Bruce I've seen it before where blades were bent or adapter broke and key was ok on Briggs. Tecumseh always break keys.
You are right. Briggs keys are tougher. They should be a bit softer.
You did good my friend with a savaged gear a mower gets a new lease on life .... I like that. Thumbs up!
Thanks a lot Bill
Thx for the tip, Bruce, on my 3hp Briggs for a tiller. I will try to follow your advise.
Just remember it is free to take a look at small engines. just keep track of the parts.
Great repair Inspector Gadget. I too saw the expression on your face. The sense of victory. As ZippoVargo would say Have a good one My Northern Friend, Ray.
When everything works right off I love it. That is why i do this.
Starts on the first pull!!! I actually cheered at my computer screen. Great fix and video series Bruce!
Thank you so much
I love it when something broken comes back to life, it's a great feeling. well done Bruce top dollar.
Thanks a lot
Your lawn looks very well too.
Thanks Chris
That was really interesting. You've been helping me learn a LOT lately so I'm super grateful. Thank you. New subscriber!
Thanks for taking the time to share your knowledge. It is also fun to diagnose at home
When you give symptoms.
That is fun
Its nice to see it all come together so nice and first pull too.
It surprised me too.
Bruce Pender Happy Birthday buddy 🎂🍰
How did you know?
Bruce Pender You told me last year on the same day so I figured it was still your birthday a year later. LOL
That's a very nice repair, Bruce!
Thanks 👍
I just cracked open the case on the same engine to inspect the governor. Like you, I had to scrape off the old crankcase gasket ... took forever. So, when I installed the new gasket, I didn't use a gasket sealant as so many have recommended. I noticed that you didn't use a sealant either. Anyway, mine is not leaking and hopefully I won't experience a repeat of the scraping agony should I have to open the case again. Your thoughts on applying sealant?
I have done both and especially on my truck, but this worked quite well (just the plane gasket)
Fun series Bruce! Serendipity always seems to feel good...
OK Always happy
Very cool! I enjoyed learning stuff. Great info about that sump bolt, I am assuming it is the same length as the others though. Another great point about the flywheel key, the tech who attempted to repair it probably went right to the key, as he should have, then gave up when the engine didn't run. I will surely remember that little shroud tab you mentioned if I ever mess with one of these...I did notice that the crank was stepped down a bit below the lower seal, wondering if this is peculiar to the engines made for Sears...
The one I got the gear from was the same diameter.
Just finished this series, nicely done Bruce!
Thanks Mr. Lawyer.
The patient made a full recovery ;-) Great job.
Right on!!
;-)
Really nice series Bruce - and like DW6 I also wish my shop was as clean as your.
Thanks so much Claus
Thanks for another video, really enjoy watching and I pick up some tips along the way. Im wondering about the crankshaft seal though, noticed you didn't replace it. Those generally are fine to reuse?
Doug is right. I hardly ever see oil under a mower. This one is OK too.
Now I got all clear regarding cam valvles, thank you for your great job!
Thaks for watching
Nice job, always nice bringing one back from the dead!
I saved one.!!!
good job on the repair bruce,question? when installing the flywheel key is it supposed to be tight or is it supposed to have a little bit of slack in it from preventing the shaft from being bent,
ive always wondered that,but if it is loose when you put in the key does that mean the key is bad?
Yes I agree tight.
If the key is loose in the slot then it will end up fretting until it is destroyed and possibly damage the slot as well. If it is loose you either have the wrong key, an improperly machined key or the slot is already worn. Which if it is then it's basically down to do you have the capacity and patience to machine down an oversize key to fit or don't care down the road if the engine is already nearing its end of service life.
Hi Bruce, just wondered what made you suspect the plastic cam was damaged as the flywheel key was intact. I know someone else probably changed the key but what was the mower doing/not doing to direct you there ? Thanks
In the video trash pick mowers video It show the backfire through the carb and air cleaner housing.
Bruce I have a Briggs engine that I thought the flywheel key was bad, but when I took it apart, the key is fine so I am suspecting the cam gear now has moved. When you pull the cord it will not move, or maybe something broke inside. Not so sure yet.
I would take the head and look in there. That is before you crack the crankcase. I had on that was so full of carbon it wouldn't turn over till I took the head off. (that is assuming it is a flathead)
Yeah, It is a pulsa prime and I had hit a pipe with it and it stopped right away and now is very hard to try and pull the cord. I checked the flywheel key and that is fine, but I installed a new one anyway, but still doesn't want to move. If I pull the plug, it moves fine, no noise or anything inside the engine. That is why I think the cam gear twisted.
Yes. There is an internal problem. Take a look, it is broken anyway right!!!
You got it, beside I think I may have a donor engine for it also.
Didn't you forget to put the key for the flywheel back in when you reassembled?
I don't think so At 6:04 I put it back in.
@@BrucesShop Hi Bruce, I had not noticed a break in the video between putting the flywheel on and the cup but I just went back and watched that part of the video again. I think you put the key on the shaft then slipped the flywheel on. Most videos showing this show the key being tapped into place after the flywheel is slipped on and aligned with the shaft. Just not clear as the keyway is on the opposite side of the shaft in the video.
Actually, it would be nice to see why the old timing gear was bad. Have the same mower that won't start. Have been over much of it and found minor things but still won't start.
Thanks for sheading light on the shortcomings of plastic cam gears, I had a governor come apart and the pieces got jammed in the timing gears, consequently the cam slipped timing as you indicated in a previous video. Do you know if the crankshafts are interchangeable from mowers to HWT(High Wheel Trimmers), THe shaft is longer on a HWT vs a Mower, but all else looks the same, BTW, I had the crank gear get stripped also...
All I can say is if you have a micrometer check it out. This is the fun stuff.
I have another HWT, a craftsman, and has the same motor, It had a hard starting problem, been sittin a few yrs, took it apart and it has the same crank but different sized slot for the gear, the Husqvarna has a fatter slot with a plastic gear, the Craftsman has a slimmer slot and a metal gear, got out the calipers and measured both shafts, both cranks were 1.1 in shafts, journal sizes were within a thousanth, I will let u know the results... tbc
@@TheNovadude Thanks Fun stuff.
Verdict is in, I have successfully transplanted the crankshaft along with the timing gear and camshaft from a Craftsman HWT(high wheel trimmer) to a Husqvarna HWT. 625E series. Works Great
@@TheNovadude That is cool. Good for you
Sorry for being late to the comment ballgame. Sometimes life gets in the way of watching You Tube. Thanks for the shout out.
No thank you. I did fiddle around with the direction to turn the nuts on the remover but being left handed i get thing twisted around in my little brain. THANKS George.
Hey Bruce, Inspector Gadget, HAPPY BIRTHDAY! 39 AGAIN!
Thanks so much Raymond Ray?. Holy smokes it goes by fast now. (61)
Bruce Pender wow Bruce only 61. I just made 62 on May 20. we both will need the Fire Dept. on stand by when they light the candles! lol.
Awesome!! Another sponsor should pay you. Advertising new boots.
You don't miss a thing :-)
You wear grey overalls with orange pockets in some of your video's. What brand are they? They look like they would be very comfortable around the shop.
They are great. I don't know the name as i bought them at a liquidation warehouse. The labelled is 3XXXl So I don't think they were made in North America hahaha
Probably not. Thanks
I was expecting you to prelube that crank bearing & oil seal.
Great job Bruce
Thanks Jerry
Call me crazy Bruce but I'm pretty sure that bolt had blue loctite. Not RTV.
Could be I will go back and look
we call the top the beauty cover lol and when we torque down the flywheel we do at 55ft pounds.. using an airgun can crack your flywheel if you're not careful
I know that but my airgun is cheap (and worn) and I have the feel just how far to push it now.
Great video Bruce .... can u do a video on a tecumseh govoner an how to set it on the inside please ?
In this video (below) it shows both types of Tecumseh governors. The first part of the video is the manual throttle and at 8:34 (not the video here but in the link) it shows the no throttle governor.
ruclips.net/video/mmiliB-jg6s/видео.html
Bruce Pender I know how the linkage works but I was wondering what it looks like in the crank case I have a tecumseh motor that will not stop screaming at me, and I have taken it apart and nothing is broken or damaged, and I wanna make sure that I set the governor arm right . Cuz every time I try to make an adjustment nothing seems to happen . Rpms is running about 6300 which is way to high ... (Toro personal pace tecumseh 22" 20031)
Set the small lever coming out of the block all the way one way, if that doesn't work set it all the way (only a half turn) and try that. I have a Tecumseh split apart. I will post a picture. What is you email?
Bruce Pender my email is d3vanhooks@yahoo.com thanks I'll give that a try
I went and checked. The governor was a wind vain one. No internal parts. I would you tube Donnyboy73
Great job! Hopefully it won't have any more hard knocks.
It is still running
Have you got a engine model number on that motor. Want to see if there is any service bulletins related to those camshafts.
128M02-0962 F1 Date 13061162
Had a quick look. They only mentioned spark plug and muffler issues on that model.
What were symptoms of bad cam gear?
Good spark at the plug but no start.
@@BrucesShop hard pulls, flywheel not turn too good?
Great work Bruce, i dont see many rider repair but hey stay easy lol. I like the shirt lol
Thanks
Hey Bruce
What was that thing you used to hold the bail instead of a zip tie?
It is a clip that holds the cables to the handle bars. (I think)
nice job,lives to mow another day!
Thanks Roger
How do you keep your garage floor so clean? What detergent?
I wipe every spill when it happens and sweep every night.
Would the plastic cam cause a light knock under load?
no they are amazingly tough. Only when you ht something really hard.
I clean crankshaft with 180 emery cloth before sump removal 400 after off
thanks for that.
It's almost August. Time to start thinking about snowblowers.
Yes I just fixed a little 2 stroke snowthrower today.
I would have used the same sump cover from the the good engine back to the good engine. I would be afraid that the bent drive shaft had hurt the other cover.
That is a good idea. Thanks
great video to know where someone can get that clip
It is just a small thing.
Great job. You are the Master.
Thanks so much. I am not sure about the master part. Donyboy73 is up there.
Bruce Pender Yeah he's also a great mechanic. Thanks for the great videos 👍👍👍. I just subscribe to his channel. Thanks again.
hey bruce,great video as always.Enjoy relaxing and watching your vids as they are well done and educational.I even fixed a few mowers i was stumped on after watching you do it.But i was wondering if u have a public email or way to ask you questions,as i need some help with this old Sears craftsman 12/38 riding mower/lawn tractor.Its model number is 502.255111,and engine is a briggs and stratton model 143.426092.And it had a tecumseh carburetor,and starter.Ive never seen a hybrid where the two companies worked together before.Ive been having issues with getting ahold of a cheap aftermarket carburetor to replace part number 632490,or 632774.So i wandering if you or anyone else may know of a cheap good substitute carburetor to replace it?I also have run into a few more issues that maybe you might be able to educate me on dear friend.Im all ears as they say,lol.But if u have an email then i can send u some info and questions.You might even be able to do a video on some?Cheers friend.😀
I am sorry John I am not a small tractor expert really. My advice is to google the heck out of it.
Don’t you have to line up the cam gear with marks for proper timing? Sure you did this but just didn’t show it.
You are right. You can kind of see it at 0:35
Well done my friend
Thank you Dave
Great save. 👍👍
Thanks tx
Bruce. where do you buy your parts?
Well some locally, some online, Some I have used from older machines. I try to buy North American first (Mexico Included). The search for aftermarket after that. Mr. Google is pretty smart.
Never had an issue with using a buisness card. 20+ years, plus my dad who taught me, at 40+ years.
Right on.
very nice job.
Thanks Josh
Ours just pooped itself. My wife hit a rock last year, bent the blade into the ground, and the crank was pretty bent. I left the crank bent and just put a new blade on. Shook some of coarse but o well. The other day I pulled the cord and it knocked real bad, and stalled. I pulled the cord again and it RIPPED the cord from my hand. I mean with a vengeance. I suspect something in the timing went, either a flywheel key, or the cam, but man didn't it kick me. I bought it 8 years ago used for 125 bucks, I guess I got my moneys worth. May dissect it and have a look.
I have bent the crank back with a hammer but now it sounds toast
I had good luck when I was a kid at bending one back straight with a hammer. It was my dads new mower and I was like 10 years old. I was shitting clinkers at first, but whacked it back and no harm. The mower ran for years till the deck rotted out. He never knew. Ha. I already have a new "free" mower so I may not even fix it. With this ethanol fuel we have to burn there is no shortage of good mowers that are free, just need a carb clean.
You are so right. Here the economy tanked and folks are fixing their own. WOW
A few years back my neighbor brought their push mower to get serviced because it would not run. They told him it was not fixable and he should buy a new one. He put it out by the road for free. I took it when he was away from home, went to the very same repair shop and bought a 3 dollar carb kit. It ran for years. I never had the heart to tell him the story. He would have been miffed.
Excellent
Thanks D
rtv silicone as a thread locker?
It worked. It is actually an oil block anyway.
Good video nice job
Thanks Joe
That cover went on way to easy...I usually have to turn the crank to get that thing to seat...
i didnt see ya put some oil in it bruce ! lol
Sometimes I try to keep the video to less than 15 minutes. So I cut that out.
That is blue loctite on that bolt.
You are right. Thanks for that.
👍👍👍👍👍👍👍👍👍👍
😀😀😀😀😀😀😀😀
Grate gob
www4.briggsandstratton.com/miscpdfs/RNT/Engine%20Specifications%20Chart_ms3992.pdf Here's your sump bolt specs
You know I have that in my favourites but I never looked for it there.