Convert a Lawn boy mower lower bushing to a needle bearing
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- เผยแพร่เมื่อ 4 ต.ค. 2024
- In this video I bore the lower crankshaft bushing out to accept a needle bearing, I do this with the Jet milling machine, and a criterion boring head. Then I heat the casting to 250 degrees for 1 hour and install the bearing with the help of a rubber mallet.
Greatest lawnmower ever made! The old Brick top was such a cool design.
I’m 66 and have managed to keep mine running and don’t plan on ever buying a brand new lawnmower.
Great work Dale!
They really are, it seems there are a lot of us out there that are not ready to move on from the best mower ever made. Why should we, you can't buy anything close and just think of all those government safety features we have avoided.
Thanks Dale. For those that might be interested this mower is 52 years old (owned by me) and had the original seals still in it top and bottom and it still ran and started great. Bottom of crank close to blade (side play) had far exceeded original specs and was super sloppy. piston and cylinder spec out like new still with no wear what so ever. don't even have to use my new. piston that I acquired about 20 years ago Ring end gap was close to 0.040 if you can believe that and it still had decent compression.. Steady died of 2 stroke lawn boy oil is all this machine has ever seen. Again thank you for helping me out here. Charlie
Thanks for the details, Charlie, it is amazing that it was so original and basically still in spec except for the lower end. Thats a testament to the care and the oil that you have given it all these years. Hope this will add many more carefree years.
I have to compliment you on your efforts to provide light and camera angles that closely show the machining processes (or any procedure) making it a LOT more interesting to watch.
Especially since I find trying to properly illuminate a work area causes me lots of grief, even without trying to make videos!
My kingdom for the Perfect Worklight!
BTW I think it's so great that people choose to repair (and upgrade) lawnmowers and similar rather than simply throw them away!
Thanks Wayne, but I struggle with lighting, these LED lights they have these days help me see, but on camera it is blinding. I just have a hard time with it. I agree, fixing old things makes a lot of sense, and you don't have to struggle with the government safety features that just make new mowers hard to use.
As I said before , I dont think i have ever seen a LawnBoy . I will have to start looking . Thanks Dale .
They are so smooth
Look for a green lawnmower...
Just like Ron said, smooth, and green. Did I mention I premix my fuel with bean oil.......smells like Motocross! LOL
@@montana2strokeracer it is blendzall for me, nectar of the gods
I've had many Lawn-Boy lawn mowers all of them for free that someone sit on the side of the road they were always started right up and run until they were gone now I have an industrial one that pulls itself and then I have a bigger one that the parks used to use it has a lot of 200 cc displacement that I can see😅 I love these engines
They are still out there, I pickup up one a couple years back, put gas in it and started 3rd pull. Is the 200cc model the one that Suzuki built for Lawn boy?
This will help for 1-2 years, but the real problem is the seals leaking after time. As an ex dealer in lawnboy we tried double lipped seals and even stacking 2 seals in the case. It all helps, but the seals will eventually fail. Keep up the good work !
Hey Dennis, I did this retrofit to mine personal mower over 10 years ago. Use it every season and have not put a seal in it since. Starts easy and runs great. Not to say it can't happen, just hasn't happened to me. I have tried the double stack seals and lipped seals too, and your right once the bushing is walered out the seal will never hold. But this prevents the crank from moving excessively. Just my experience.
The seal probably leaked because once the bushing wore,, the crank would move too much eating away the seal, the new upgrade bearing should hold the crank stable and there should be no problem with future seal failure
Great video, I watched all clips in your LB playlist. You make it look so easy.
My old C series “long snout” cases were not round OD bushings, looked they poured the brass in, then bored it out to fit. I have 3 from the 70’s that I use weekly & a couple of spare cases.
No local machinists would tackle the conversion. Had the INA made SCE1412 bearings & seals already…
I think your right RC, I think the bronze was poured when they cast the cases. It's not real uniform. I am not surprised about the machine shop; I have a lot of folks tell me they don't bore motorcycle cylinders either if they are over 10 years old. I guess it's a liability thing. Sometimes I worry about it too, when I get a cylinder sent to me and it is insured for 1000.00 bucks. Makes me think twice before I bore it. Everyone messes up from time to time. I have done several of these lower end conversions and they work great. The one I did on my own mower has been running for over 10 years now, and I have not had to put another seal in it.
great repair job dale should last a good whille keep up the good work next video please
Thanks buddy
Great fix Dale. They used to make a two stroke mower here many years ago that had a 35cc J.A.P engine in. I have an old Suffolk Super Colt with a side valve four stroke. Made by the Suffolk Iron Foundry. Its from the 1970s, but the same design as the ones they made in the 1950s.
Best wishes, Dean.
Just something about the vintage stuff, another thing I like about the old stuff is it has no safety features like the dead man switch.
Awesome upgrade ,and awesome machine work, that lawnboy will be a screamer
This procedure sure adds some life to these old mowers. Yeah, these bad boys do scream up to 3600 rpm. LOL
It's been 30 years since I have heard a lawn boy run😂😂
Well, maybe it's time to find another one. Still a neat machine and there are no dead man devices, remember how simple things use to be?
Thanks Dale!
Cheers, Peter.
Peter....your back, great to see ya.
Thanks for the video, Dale. I subscribed a couple weeks ago when you were splitting the 2-cyl Yamaha crankshaft apart.
Thanks Wally, sure appreciate the subscription. Glad to have you on board.
Beef prime rib roasts,61ish in change 👍👍👍👍
Excellent work.
Thank you John.
What's a lawn mower? las Vegas we have rock yards front and back! LOL
Frank you can sit this one out man.
@@montana2strokeracer hey, still interesting i had a lawn boy in California loved that thing made mowing fun,and smelled good while mowing.
That is a good repair.
Thanks buddy
👌👍👍👍👍👍👍👍👍
You forgot the best part 😀 They're Twostrokes braap 💨💨
Right on brother!
You surely do nice work Dale! Can I interest you in coming down to Alabama to help me sand/block my old Toronado prepping for paint ?? (I'll supply the beer)
Thanks Johnnie, I can't seem to get my stuff done. I used to really enjoy autobody, these days I would rather eat a bug.
@@montana2strokeracer I get that. Me too, actually. I used to enjoy it, and did a LOT of 2nd Gen Camaro's back in the day. After my son and I did his car 5 or 6 years ago, I swore I'd never ever do another one. And that was a small car. I remember his saying, now he understood why a paint job is so expensive. BUT, here I am, yet again, doing another one! These projects keep me young. That's my story and I'm stickin to it. I'm the youngest 74 year old I know.
I hear you Johnnie, I have done a lot of it, but it just doesn't interest me any longer. But your right, I think the minute you slow down it's over. Got to keep the mind busy, I have learned so much about these old machines that I thought I already knew.
On deck!
Awesome
Hi Dale, since you have a way to harden and temper steel, you might have experimented to see how hard transmission gears are. I have been thinking of making some but have not done hardening test on old gears. Do you have a hardness tester and what fact or lore do you have about how a gear is hardened and how hard is ideal?
Hey Mark, I do harden and temper some small parts from time to time, I have a very basic hardness tester, but I have never sampled any transmission gears, just haven't had the need up to now.
Yes we had new one Peace out 300 the cost of it
Thanks David