Fixing A Lawnboy Mower That Won't Change Engine Speeds 

I'm a mechanic and the first step is always verify the complaint. It has nothing to do with if I trust the person or not.

really unique mower. solid condition too.

Yep they’re a pain to work on. I have a tc 300 series that uses an air vein governor. If you can order a new spring, I suggest that you order one or lock down the throttle in rabbit speed & do away with the throttle cable

I've had some carb issues with my Duraforce too, by the way that ribbed wheel under the air vain can be spun independently of it to adjust the tension on the spring. This video couldn't have come out at a better time! I'm working on my Duraforce too lol Edit: I really should have watched a few seconds longer before commenting. I will post a link to a video in a separate comment that has some helpful info on the dial.

You can adjust the governor with the carb on by spinning the wheel at the bottom of the air vein arm. It's a good design.

I'd take what I could get and be glad to get it! Briggs made those 6+ horse I/C 2-cycles that had to be the toughest rig anywhere. Thanks and you'll get it! BLESSINGS!

Had that mower since new early 90's, worked in a landscaping business for 20yrs, never had a single problem except a front wheel, and one of gears in tranny finally went. Bought a temporary 1 speed trans off eBay until i can find the proper one. Which is what I'm looking for now. Point is, best mower you will ever own. If ya get a chance to buy one and it's in decent shape, don't hesitate. Working on it once or twice over a 25yr span is well worth the trade off.

This job that u do is my dream and I watch you every day keep up these amazing videos

Totally different to the Victa 2 Strokes we have in Australia

yes, I would want one especially after using my friend's old one this past summer, I thought it was way cooler than my 90s 4 cycle lawn boy.

I love Lawn Boy 2 stroke mowers. I've been using them for about 40 years. The one I have now I bought new in 2003 for $350. It is wonderful. It starts easily after sitting over the winter months, 1-2 pulls. It's 6.5 hp engine is very powerful and easily plows throught the highest, toughest grass, i.e., Bahaia. Also, no oil changing. Just mix oil with gas and that's all the lubrication the engine needs. Besides all that, mine is one of those with an aluminum deck, light weight and no rusting out. I love my Lawn Boy and am sad that they were bought out by Toro, who ruined them. The 4 stroke versions with the stamped out steel decks were garbage.

Picked up my first one this fall and had the same issue. For me it was that the spring had slipped out of the slot in the top of the governor blade. Worth checking while your in there.

That knob on the air vane adjust the rpms by about 50 or so for each click. Clockwise to increase, counter clockwise to slow it down. Duraforces spec about 3000 rpms but that is too slow in my opinion. I own 2 of them and run them both about 3400 rpms.

As much of a pain as a Honda ! Nice save sir 👍

I don’t know anything about this problem but still enjoyed watch this video.

Love it, keep up the great work😇

Well, here coming to the 2023 end of season. Neighbor gave up on his 10323 and handed off to me. Problem was that famous hunting and surging. Solution after 2 yrs in storage. Ever so lightly drilled the carb main jet more just like a honing. Perfect now 👍🏼 Many out there said they did everthing to no success. Free it's good.

Great video my friend!

That Round Dial Is Able To Move To Adjust The Speed , You Should Be Able To Pull Up Or Push Down & Turn ( Not 100% Sure )The Round Bit & Turn It To Adjust The Speed . Either Left Or Right. It Allows More Air & Acceleration. It Adjusts The Governor Vain

Never owned a Lawn Boy, But had a #16785 Toro Two Cycle that used the Suzuki two-cycle, bullet proof engine. Was a bad day when the fed/gov mandate to cycle mowers out of business. Had I been thinking I'd bought up a couple when they were available so I'd have one today to use.

This is why I went to trade school and have been a certified OPE tech and master service technician for 30 years. OK, so no need whatsoever to remove the carb or mess with the governor spring. The dial on the throttle shaft is how you adjust engine speed. Use 2 fingers to turn it counter-clockwise to increase engine speed to 3300 RPM, turn it clockwise if speed is too high. 15 second fix, on the spot, boom just like that. I love your videos and all, but this one had me doing a real face palm.

I love my 2 stroke lawn boys. I have a 7268 I'm planning to rebuild. i was able to get it running, but it started slowing down and died. Would not restart. Did a compression test and only got maybe 60. I have a NOS piston, rings, and seals for it, The carb kit was done already.

I have one of these and 4 other older models. They were so easy to repair but mine have never broken yet. The carbs are literally so easy to rebuild and the parts for them are still available and cheap

Love these mowers.

I can only imagine how much hp I could tweak out of a 2 stroke that big

Strange governor set up. Turning the adjuster either way should fix the problem.

If it were mine, I'd do away with that overcomplicated vane setup and implement a simple friction lever for speed setting and separate homemade choke linkage, pressure washer style.

Hey bro what's up? I'll pass on owning a 2 stroke mower. It appears to be more troublesome once working on it yourself.

I've been doing some brainstorming on how to get aftermarket lawn boy duraforce carburetors to work because I'm having issues with mine, I think I finally cracked it! My old carb dumped gas into the engine and on the deck, and the new one isn't jetting right. The plan is to take the jets from the old one and swap it on the new one. Maybe this is me being stubborn though, haha

I wouldnt mind haveing a 2 stroke mower, it would have to be older than that one to avoid all those plastic parts.

I would love to have an old lawn boy if it was self propelled and had an aluminum deck and came with a chute and a bag. Just for the nostalgia really. I used to used these from time to time when I was a kid working for my neighbor. I always found lawn boys to be cool mainly because of the 2 stroke engine. I never really cared for the right front wheel being off set or the bag set up on the side. It made the mower bulky and hard to maneuver and cut in tight spaces. While I love 2 strokes these lawn boys seemed to lack a little bit power compared to the 4 strokes when it came to cutting the really thick tall grass. Maybe I'm wrong but that's what I remember.

I had a 10323. Good mower. Needed cables and i also had a couple other duraforce gold series mowers so I ended up selling it rather than throw more money at it.

As I recall, there is a procedure to “clock” the spring. I have a 1991 model, and have yet to figure it out satisfactorily.

I love 2 smokes and this system seems a bit complex but when it works life is great and when it doesn't you get this pain. If this was mine and I was trying to fix it I think I would just put a manual throttle control on the handle.

The splined wheel under the air vane turns and can be adjusted

I have an Australian built Victa 2 stroke lawnmower which l.foumd on the side of the road a few years ago & it over revs because the governor relies on crankcase vacuum & the crankcase O rings & seals leak air so it Only runs at full speed & stop speed !

Dad had an old 2 stroke one, it lasted 30 years with minimal repairs, It didn't rev real high so the engine lasted on it.

Turn the round dial below the air vain. One direction will increase idle speed, the other direction will decrease idle speed, you will feel the wheel clicking to different position, takes a bit of force. This can be done with engine running. Note: turning wheel while running moves vain . I.E when turning wheel and vain makes engine rev up, and you feel the wheel click to new positon, your actually turning idle speed down. The opposite is also true

You can buy a replacement spring. They are still available. I replaced one a few years ago.

The plastic gear knob below the air vane sail can be turn either direction to adjust the throttle spring. Thus control the engine speed. I heard the lawnboy engine can run at 4000rpm. The two stroke engine always runs faster. I did rebuilt one that they have a steel sleeve cylinder while the Briggs and Stratton four stroke flat head is aluminum cylinder. The old lawnboy have needle bearing on the crankshaft . That's why the old lawnboy two stroke run faster yet last .

I just bought on e of these and way better than my POS Troy bilt that threw a rod.

hey i need some help i have a 2stroke lawn boy im fixing right now and i put a new carburator on it and when you change the speed from choke to any other speed it stalls and you can only move the throttle lever a couple centimeters before it stalls (the throttle valve on the carb works like it should when you change speed)

yep i would not mind using one if i lived over there or working on them and if i needed to replace the carburetor aka carby i would simply do it as it,s easier after doing a good thoro cleaning and carefully re-assembling etc.

I know that this is a lawn mower video, but would you do a spark plug wire replacement on a generac XT8000EFI

Does the filter need to be dry or soaked in oil?

Hello Home garage Happy New Year how was your Christmas I think you should get a new spring to put on the carb

I recently purchased a 10324 and im in need of the speed adjustment lever you called slide and im having trouble locating one, do you know where i can get one and would you happen to know the part number? Thanks in advance

In my 15 years of fixing and flipping mowers I still have not run across one of these.

Can anyone help me on this? I compression tested a warm briggs flathead mower with hand pull starts and it yeilds a lousy 60psi. However.. Using a drill to spin the flywheel, the compression gauge outputs 105psi. The mower seems to run fine but I like to take photos of the gauge for proof of it's condition when I sell it. Any help would be appreciated.

Hey got a question for you and the people in the comments. I'm about done with my small engine class and going to start a small business. What tools should I need to acquire first to start off successful

mr garage, can you help me find out what's wrong with my mower? i have a ride on mower with a briggs model 28 engine, 12.5hp, it simply does not want to start 100% of the times, most of the times it just spins and shoot flames through the carb, but does not start, the flywheel key is intact, i checked like 40 times and i can't find what's the problem, i also honed the cylinder and put new rings but the issue persists

I have the same machine only has a fuel tank leak any ideas? All ready tried Soldering but runs well.

I would adjust the drive cable to slow it down and keep the engine rpm the same.

Looks about as painful as working on Victa 2 strokes that we have in Australia, so much plastic and o-rings used in them, they have air leaks and revving issues all the time. I think they only good 2 stroke that was ever used on lawn mowers is the Suzuki 120cc, we have them on Rover mowers here but they were used on Toro mowers in the USA as well.

I have a very similar issue mine won’t crank high on hot idle but the idle goes in and out on cold start and the stop won’t even,work I have to turn off the fuel to turn it off

The Lawnboy mowers are built like tanks. They just keep on going.

The dial adjust the spring tension turn it to increase/decrease speed

make some long studs and thread them into the side and then stack the gsk, plate, and carb on. take out one at a time and replace with the bolts

I will pass on one of these🤣😂🤣

Ngl, I would've expected a fan based governor (the spinning dual flag thing in music boxes) on the engine shaft.

Adjust speed at the wheel on top of spring 3 or for clicks at the time

I enjoyed the 2-stroke engine when I was younger, but we didn't do any of the repairs to it. So I have no idea how to fix this one.

Lawnboy. Never seen one that looks like that.

Wish I was tech. savvy so I could advertise My Silver Series self propelled two cycle Lawnboy mower in excellent condition. Just needs carb work. Have no use for it Just sits in my storage unit.

Who would have thought that a little spring would cause so much trouble. 🤦🏾‍♂️🤦🏾‍♂️🤦🏾‍♂️🤦🏾‍♂️🤦🏾‍♂️🤷🏿‍♂️ #stihlpower #stihlisyourdaddy #stihlrunstheyard

I'd have left it alone and listed that only runs on high speed. I've had a couple of those come through, 1 sold for parts and 1 went right to the scrap yard. Around here, they don't sell, so aren't worth the time and parts to fix them. Good luck!

Honda 4 stroke OHC fanboy here. Two stroke engines are very finicky when it comes to adjustments and keeping constant RPM. Having to deal with mixed oil/gas is also an additional chore. Honda 4 stroke engine mowers seem to fall apart all around the engine, generally wheels, drive belts/mechanisms, cables which IMHO seem easier to deal with. Love these videos and the thought process used to repair the equipment. Keep up the excellent work.

Wow. So many afraid of the unfamiliar...

You're playing on hard mode. Apparently, you can turn the plastic gear to adjust the position of the air vein.

Tecumseh and Suzuki definitely had much better designed 2 stroke engines compared to this, those engines do have governors on them like a 4 stroke and they aren’t any more difficult to adjust than one.

Eliminator Performance has a great video on how to adjust these, it's called "How to Adjust RPM on a Lawnboy". As they get older, they also need the idle jet drilled out a little larger with a micro drill bit #78 (0.016") for a smoother idle.

I have a few mower can you fix them for me

Oh s*** this is a two-stroke? That would explain why I can't get the thing started I have one put gas in it and I'm like it wants to start but won't 🤣 I picked it up for $10 bag is in decent shape

Good morning

Your childhood trauma shows you still like these old mowers. It's ok.

Not a fan of this mower in particular. I just don’t like the way it sounds. That’s probably a dumb reason, I know. 🤷‍♀️ Thanks for your time, HG.

I freakin hate these machines with a passion but I also can't deny the money that they bring all fixed up. I had one with a similar issue and I reached out to @KensSmallEngines here on youtube and he walked through about the adjusting carb via the knob. he sent me this video and look at the <a href="#" class="seekto" data-time="168">2:48</a> mark ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EwicpzQqN5M.html

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GswQYrEFCVY.html This is the video for the dial! Hope it helps!

Sadly Lawn Boy missed the mark. I do like good two strokes. Toro and Jacobson made good along with some other brands.

Where is air filter

Dude i seen the supra is it yours?

I’ve never seen a 3 wheeled mower that looks like it’s been in a car crash. No I wouldn’t want that mower.

I can see why those mowers are no longer made.

No thank you. I’ll stick with Brigs.

Two stroke engines have more torque, great I. High or wet grass😊

Air filter

No 😁 No reply needed just a statement.

No I don't think so I'll pass

Nope I hate lawn boy 2 cycle mowers had a old one and did everything that I had to do it exploded the head in pieces and it was just a the shop 2 days prior for low rpm

Worst mower I’ve seen. Crappy carb and off set wheels. 🇦🇺

First thing i would do is scrap all the govenor stuff and make the carb 100% manual choke lever and throttle lever .

Why do people think this brand is so great? I'm no expert with them but from most of the models I've seen they seem to be pieces of 💩. I was given a no spark silver series with bag. It was a decent mower but I didn't need it so I sold it. Different doesn't necessarily mean better and these things are just funky.

Great video, I do like the old 2 stroke Lawn Boys but they can be a pain to work on because of the carb and governor design.