How To Service A Briggs And Stratton 35 Classic Petrol Lawnmower Engine
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- Опубліковано 26 бер 2019
- Service kit Here geni.us/6ccr (Amazon) and here geni.us/fdv3n (Amazon) and here for springs + Primer Bulb for springs + Primer Bulb
In this video, I show how to service a Briggs And Stratton 35 Classic Petrol Lawnmower Engine.
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This was great advice, i have never pulled apart any type of engine or carb before, followed the step by step instructions from the video and started stripping my lawn mower that has not run for 4 years. Didnt know what i was doing but carried on regardless, i had nothing to loose because i went out and got a new lawn mower 4 years ago. Anyway stripped it down, cleaned it up, changed the oil, sharpened the blade, put it all back together. Waited for 5 mins then desided to pull the cord. To my amazement and joy it started first time. I now have two lawn mowers. Thank you for your great step by step instructions. I also didnt need to get a new gasket, old one worked just fine. Top job
Great video!I have the xc-35 since 2009 and is still running superb.Excellent piece of machinery.
Hi Mower Man!!! I've got two very old Briggs 3 hp mowers. -69 and -73. They are just brilliant machines, and i use them every summer.
Thanks Paul did them it's wired because when I changed the carb and tank it still did the same thing with a carb that runs as it should on the other mower, thanks anyway, love the vids you and Martin best out there,
Well I've just used this video to help service my 13 year old 450 series that looks exactly like this 35 classic. Seems to be almost exactly the same. Thank you 👍🏼
Great video, very informative. It's given me the confidence to service my mower now. Cheers
Nice to see you back David
Mine was pulsing. I took it apart and cleaned it out following your video and voila. Thanks so much!
Had mine for 19 years and still running great, infact as good as new.
I have recently inherited one of these that's about 20 years old, can I ask do you store fuel in it over winter or just use fresh each spring? I'd like to keep it going as long as possible. Thanks
@@robzaphy Yes, usually just run it the tank down with the last mow of the season. Still starts first pull. Keep plug the plug clean. Change the oil too!👍
I didn’t read about the safety bar and took me forever to start it and then when I used it it came to life on the first pull
Hi.I got this B&S 35 classic here in NZ from my brother in law who saw got it at a garage sale abandoned. Your youtube channel helped a lot, simple and good instructions.Thanks a lot as I managed to bring it back to life.
Matze NZ Fantastic mate! Glad to help!
Really good video, I have learnt a lot and now I think I can have a go at my Qualcast 450 that has never been serviced since I bought it in 2013.
big thanks for this. just picked up this exact mower and want to service it.
liked and subscribed.
Excellent video great to see you back☺
Great 17 years sitting idle and started right up after
Had mine for 27 years, still running, steel chassis rusted after 2 years, put an older aluminium one on. Replaced carb as mouse eaten primer button. The 3.5 continues to work!
Hi I watch all your videos they help me with my brigg and Stratton keep up all the good work more videos
Thank you Mower Man!
Mine was running 10 mins then dying. Sorted a new bulb, plug and filter. Running great and now my boy can help me with the lawn! ;)
Thank you for these videos. Ive used you links on your website for a load of the kit.
Thanks a lot
I just bought one of these for £10.00-Just as something to work on with my grandson-You are now my go-to guy.
(You have been warned !!)
Thank you, you just saved me $100 in servicing costs, legend
Dragon Malice Fantastic glad to help!
Hi, big thumbs up! Just bought one today based on your video thinking I can fix a broken one. Rusted cable in the sleeve, rusted and stuck flywheel brake, no spark in plug, carb springs disconnected etc. All good now and runs great! Was well worth the £20 and with the lockdown it was 2 hours well spent.
Glad I could help!
Many thanks. Clearly explained. All the best. Ian
Cheers Ian
I've got an old 32 classic yellow I'm needing to service mines and a paint job, it's a great little mower but it's reving up n dwn and blowing some dirty smoke, I'll try a oil change but it's definitely not running as it should. Your video's are great thanks.
Change the diaphragm and gasket
Excellent Job Mower Man easy to follow your instructions , just picked up a 2002 Murray Briggs 3.5 Classic, cut a lot of grass. A kid and his dad bought it for $10 and flipped it to me for $35. It runs and cuts grass very well I might add, lol. Thanks and best with your repairs.
Inspiring. Going to look at your website. Ex car mechanic here looking to get back in a trade and have decided to venture in a small engine repair business. UK Based 😀😀
Thanks mower man, I was trying to start the classic 35 'world', it would start and then immediately cut out! It has a throttle cable that comes around the carberator and up to handle, different from the one in your video!
No worries!
Nice job Paul .
Pete Froud cheers Pete!
Thanks for the video! Was very informative 👍
Cheers Mark
Thanks for the reply, i really appreciate it 👍, nice work,
It’s always wise on every service of these classic engines to replace the gasket and diaphragm regardless if are they are running fine , they are dirt cheap and they are the main thing that goes wrong on these. I sold a mower once was running fine the person contacted me that it wasn’t running right, I picked it up new D&G job done, from that day I always fit a new one. Also when I service a mower in the main I clean the carb, because the mowers can be running ok but there can be muck in the bottom of the tank or bowl. Better safe than sorry🙂👍
Your comment is the kind I dislike the most, it makes assumptions that just a little bit of research would refute:
a) They are NOT dirt cheap.
b) They are NOT readily available which makes them even more expensive.
...and yes I realise for service centres this is NOT the case, but I am not a service centre except for my own mower.
Great video, thanks mate!!
Trigger Time Thanks for watching Trigger!
Thanks for the video it has give me the confidence to have a go myself.... the only part I can’t find is a new cutting blade pls could you help 👍
It's been a while...glad to see another video from you
Cleaned up blade add new spark plug and now its starts like a dream
Long time no’s see, from So. Fla.
I just vid of me starting it, already burned off little bit white smoke on first run b4 rec. Full of life on every single pull
Thanks for this great vid.
Daryl P Cheers Daryl!
Mower Man no problem. I have also just got this same mower from my uncle as it stopped running. I have taken the carb off today and cleaned it and it started after about 20 pulls and cut out after 10 secs and won’t start again. I changed the plug & ive noticed the blade isn’t places in them lugs as they’ve snapped so the blade spins . so it possibly could be because its out of timing as you mentioned. I will whip the blade off now and try again :-)
Hi , should the governed spring coil move back and forth when running or does it stay locked in position.
With one hand he can do more than most with two. 👍
Best video ever top man this is like mine there brillant mowers 😊👍
Found one at dump today runs well.
Nice one
Real good videos. I've got a briggs and stratton 35 classic I've changed the gaskets on the carb coil changed and guvnor springs mower runs then stops any ideas ?
Great Video - on mine the fron silver bolt came off ...and the front bolt ...I took the missssing ones off an old Sverighn ..but the silver clip doesnt want to scre in easily ....what does it do ?
Best video ever well done 😊👍my law n mower is the same last for ever
Can you tell me what size bolts i need to hold carb and fuel tank to body please, have this same model and just need to be able to fix these parts together.
Some years ago I bought a S/H Lawn King for £20, The fella said it was ready for a service but I thought i'd try it first, I got half the lawn done when I made a strange noise, I let go of the bar but it stopped dead, Siezed!, There was no oil in it! 😬
I let it cool down for ten mins and put some oil in and tried pulling it over, Wouldn't move, Gave it half an hour and tried again and it pulled with a bit of force so I pumped the purge and blow me! It started first pull but with a puff of blue smoke!
Every time I use it now there's a puff of burning oil smoke but it always starts first or srecond pull!!
Seems these little four strokes are bullet proof!! 👍😎😎
Good video. Mines a husyvanna 35. Mine revs up and down like it's about to conk out then fires up. It never cuts out and mows fine. I. Checked the flapper assembly and that's all working free. Everything else seems in order apart from spark plug. I cleaned it up and it was fine for a bit then happened again. I don't want to buy a spark plug then ruin it. Could there be a way for oil to leak onto spark plug as there seems to be oil on it. Thanks
Great video!
Is there a way to keep it in idle when letting go of the handle if you need to manouver it between cutting again?
Do you sell a replacement Rev cable for this model? Currently repairing my dads one the cable and red handle all loose no tension on the cable? Also bolts missing for the pull cord housing could you point me in the right direction?
Can you advise please how to adjust the height of the front wheels of my 35 Classic Petrol Lawnmower recently acquired? Unlike for the rear wheels of the mower and as in your video there are no handles to adjust the height. Many thanks
Thank you Good
My pull start just snapped, is it easy fix to put new rope in it or will it need whole new pull start assembly
Hi! My engine runs pretty rough, there's quite a bit if white smoke coming out and some sort of rattling / knocking sound. It almost sounds like a shoe in a dryer or something. Any idea what it could be?
Hi, I need to replace the starter rope on my Mountfield Classic 35. Can you tell me the part number for the original replacement? Do you have a video of how to replace this part. I know how to do it and the rope has not broken so will be a straight forward fix. Just wanted to see how you do it, if there's an easier way. I would normally pull the old rope all the way out and then lock the sprig in place with a screwdriver whilst I change the rope and then let it unwind back in, slowly! :)
Hi mowerman can you do a vid on replacement pulley cord on the classic 35 ta.
I've taken my mower apart but the small spring looks quite loose - is that right? Help!
Hi is it possible you can help me I've got a classic 35 in need of a new deck any ideas where I could get one or do you know what other decks will fit the engine thanks
Great video and demo, got the same mower and gave it a service. I took off the fuel tank to clean it all out and I can’t put the springs back how they should be, can you help please?
ua-cam.com/video/pSumFVX5H3s/v-deo.html
Hi do you know where I can get a set of front wheel with the adjuster please thank you for your time
Brilliant video. Just picked one of these up and I can’t pull the whole mower backwards seems jammed any ideas? Thanks
Its self propelled the belt wont allow the mower to go back wards i have 1
Hi,i have the same engine on a mountfield and believe it needs the piston rings changing.ive got the engine off the mower and seperated the crank case.BUT cant get the blade lug off the cank shaft,so cant get the crank case off...can you tell me you how do that,im stumped mate :) please let me know asap as im in the middle of the job,thanks in advance!..dave
Do you have any information about the torque specs of this engine. It is very difficult to find them. Thanks
Do you have a video of how to replace throttle cable on this mower model?
Hello brother, may I know if model 375 sprint using 2t or 4t oil ? And if so, how much should be poured inside ? Thanks in advance.
Guys, have you removed the main jet & tired to replace it? I’ve had a nightmare trying to get it to click in. When I got it to locate the choke was stuck. Removed the jet again & now it does click into place :(
I've got a Biggs and it's running really fast do you have a video on what it could be and how to fix?
Hi my lawnmower 35 mountfield Same as this video but with a black handle cable on the other side of the handle for engaging drive.
I take it the parts are the same I want to service my mower myself as shown in your video.
Details on the mower are 35 Mountfield 9D902 2006E1 00060652
Looking at your replacement parts on ebay I can not see that serial number anywhere.
Cheers for your help.
What size square bit to drain oil plug please? Your vid helped me replace my Diaphragm
I use a size adapter for bigger sockets as it's square
Hi Mower Man,
Many thanks for your fantastic videos.
I have a Classic 35, had it for at least 20 years, starts first pull as long as I use fresh petrol !
Anyway it needs a service, not changed the oil in all that time. It certainly needs new cables and springs for carb idle regulator is it called?
Where should I order a KIll switch cable from complete with outer casing?
Where should I order the carb idle regulator springs from?
Lastly, the diaphragm and gasket kit from?
Many thanks.
Just to add its a Mountfield Mower.
Hi Jiffy the springs are called governor springs. You can find these parts at the website repairlawnmowersforprofit.com/recommended-products/
Great video. I’m going to give mine a service. We were gifted it. When starting the pull cord doesn’t return. Any ideas?
Night need a spray of wd40!
Hi mate your vids are good with clear directional info.could you be as kind as to advise me how to go about sorting one of these b&s orion 35s which runs was cutting sweet but suddenly when l get into longer grass it seems to have lost her torque.will sub with you and buy any bits thru you too, your doing a grand job sharing your knowledge,l am a manc and you soind close by, much appreciated..
Hi I've got the same lawnmower.
I've followed this tutorial but still can't get it going.
It fires up straight away but dies instantly like the revs are not staying on.
Any advice please?
Thank you ✌️ 💚
Hi mower man, excellent video, I’ve got one of these 35 classics, and the runs nice and even, but the primer bulb keeps sucking inwards while I’m mowing, causing the engine to cut out as if it were out of petrol, Do I need a new primer bulb or could this be some other reason?
I've never heard of that. I would buy a new genuine part and replace. Sounds like it's gone a bit soft
Hi, I’m looking for Honda GV100 keihin Carburettor gaskets & o ring.
Any ideas ? Thanks.
Videos are excellent by the way 👍
Mountfield Omega Laser 42cm 1996
Excellent video. Thank you so much. I just bought one of these. it was sold to me as a non runner and Im excited to get it working. Mine is a Mangetron, what does that mean? i also have no Primer bulb, how would I prime it??
If it has no primer you don't need to prime it. Magnetron and ignition coil are same thing! hope it helps
@@MowerMan Thank you. I really enjoy your videos theyre informative and interesting and you have a really nice screen presence. I feel like im hanging out in a mates garage.
@@mixjess5901 That's nice to hear thanks
I have just bought one of these for 20 quid it starts and I'm going to try and service carb myself as it sounds sluggish but I'm wondering about paint the red is peeling an I think once painted it will look great . What paint do I use . Thanks
Andy Kingwell I'm no expert at painting them to a look at retro restore channel. Martin spray paints them. I'djust husr hammerite red smooth but most times I just sell as is
Hava a similair and have a question about the oil-tank. When I tipped the Mower over to check underneath it did get some oil out on the left side through the silencer. Is that normal. Shoudnt that be separated oiltank and the piston-house?
It should be fine but it might smoke fo 10 minutes when you restart until it burns off the excess oil
Great video! I own one as well, why did you not drain the oil from underside? Drain plug?
Michael Grebstad I just find it easier with the extractor but you can do it that way
@@MowerMan Just a mild rebuke, most of us won't have an extractor.
Hi Mower man, thanks for the video. I changed the carb on my Stratton and Briggs 35 (was running before but hadn’t been serviced in years). Now it starts but cuts out straight away. Any ideas why this could be?
Many thanks!
Hi, did you get it sorted? Mine doing the same. Cuts out straight away. Thanks
Great video thanks, can I get some advice on my identical engine. I’ve foolishly stored my mower over winter tipped up facing down. Oil ran off the bed when on the flat and it will start but won’t run. Black oil spitting out of exhaust when starting, can you advise how I sort the issue. Many thanks.
Make sure there's enough oil in it and rin it till the oul burns off. Pull the spark plug out and pull it over to let some oil come out first and keep cleaning the plug. It will stop smoking eventually maybe upto an hour though
@@MowerMan great thanks I’ll get on it tomorrow
I have a petrol lawn mower its called a handy model with a briggs and stratton engine I can not find were I can get a new throttle cable from
Hi. Loving your videos. One thing I cannot get my head around is:-
At 6:34 in your video, the is a hole left of dead centre of the screen in the recoil casing. My Champion R434 has a clamp screwed in there as if for a stiff throttle cable to adjust choke, max, slow and stop.
Obviously the stop on these engines is the brake mechanism.
But I have not found ONE video online which shows a throttle cable connected so my question is how is the choke regulated? The control bracket has THREE distinct positions but they never seem to have a throttle connected!!!
Am I missing something? Been given this mower by a mate, a few years ago and thought it was about I got it up and running.
Perhaps it is simply that they are designed to run at max revs and rely on the governor springs alone?
The throttle does very very little if anything on these engines that's why they are never connected. Most people just set it full and bend the tab down. It's a flat head engine without overhead valves so you don't get that accuracy via a throttle cable also the carb is much more basic.
@@MowerMan Thanks for the prompt response.
It started first time with a clean of the armature, flywheel and spark plug lead connector which was quite corroded. Got a dremel in there with a steel brush on and a flap wheel for the armature.
Really VERY smoky on start-up but I had squirted some PlusGas into the cylinder thinking the rings were seized.
Then realised there was a flywheel brake. 🤦🏻
When I revved it up, it must have been doing 6000-7000 rpm!! Obviously didn’t hold it there for long. I suppose max revs for these is 3600rpm.
There doesn’t seem to be much that can go wrong with these small engines. I can see why you like them.
So basically all I need to do is get some springs installed and then set the throttle to the highest speed by bending the tang.
I have limited experience with small engines but these seem so simple in terms of carburation.
I have a Titan strimmer which constantly requires attention and is a nightmare quality wise.
hi when i change the oil i tip it over… now when i started it its hard to pull the cord and won’t start? what happen?
Wonderful video.
I have noticed some videos where the lawnmower is tipped on its side.
Would you recommend that as a way of emptying the oil ?
No. There's usually a drain plug
underneath. Or use an extractor. Whatever you do don't tip it right over
@@MowerMan much appreciated response.
In order to get to the drain plug underneath can I tilt the mower on it's.handle.bars with the front of the lawnmower sticking up into the air?
Or is there a better method of tilting
Many thanks for your time and assistance
@@sajids2 lean it against a wall half way over with the exhaust pointing down
@@MowerMan do you have a video where you do this I e. Tilt the lawnmower safely.
Sorry for sounding silly
I don't want to take the risk of damaging the lawnmower as I am worried I might get blamed by the family
what blade size to they use ??
How would you empty oil if you didn't have a pump like in the video
Great video .What is the most likely reason they won't start please
ua-cam.com/video/xzHekYyxRh0/v-deo.html
Thank you
Hi Paul! Thanks for the informative video, its really helpful! I have the exact mower and I am going to service it this summer, it has always been a pain to start up and get going (even after being serviced by a company!) However once its warm and been running for a few minutes it starts so effortlessly. Any thoughts on this mate?
It does on occasion rev high and low which you may suggest the diaphragm and gasket may need replacing, it is intermittent though but for the sake of a few quid ill change it.
These engines are work horses and dont stop! Thanks again for the great videos! :D
Make sure the primer bulb is working and replace diaphragm and gasket
@@MowerMan Hi Paul, I finally figured out why my mower is a nightmare to start first time. The primer bulb was working and sucking fuel up but it was not squirting it out, it was all in the bulb and backing up in the tube into the thank. Once i got the primer bulb off I could see a very small bearing in the carb that looked like the route the fuel should squirt through, so i gave it a bit of a nudge with a fine needle to loosen it up and job done!! Primer bulb back on and it then started sending the fuel through, I imagine this bearing got seized up somehow?, Have you ever had this issue in your time working on these mowers?
Prior to me finding out the cause, the mower had alot of TLC including new diaphragm and gasket, front head gasket, inlet and exhaust vales cleaned out of carbon, crankshaft inspection, blade sharpen, oil change, filter, spark plug and a good old clean. She looks brand new and runs like a dream :D. Thanks again paul!
@@Verstrappen That's very interesting a great find. Thanks for sharing! Happy mowing
@@MowerMan No worries, thank-you! Only downside now is because the mower is so clean and sharp, its cutting and picking up the grass like wild fire! I have to stop and empty the grass collector a lot more often than before 😂
Hi, do you need to mix oil with the petrol on these models? If you could please let me know I’d appreciate it.
no
Hi Mowerman you comment on the Guide pins for the Blade, I have an old Champion 35 and both pins have sheared off, I have looked on the internet and have been unable to source some! have you any idea where I might get some from? thanks!
You have to buy a new blade adapter
@@MowerMan Okay can you still buy one for such an old mower?
Hi there,I have the self propelled model of this machine and has lack of power in at have resorted to pushing it.Any ideas what is wrong?great videos and thank you
Try fitting a new belt and cleaning the belt guard out. I show how on lots of my vids
@@MowerMan Thank you
Could u send me a link for a replacement blade for classic 35 or product code
Hi Lawn Mower man - thanks for the excellent videos .. I have the same lawnmower in the video and looking for a replacement rear wheel.. can you please guide me where I can purchase? Many thanks
repairlawnmowersforprofit.com/recommended-products/
Mower Man many thanks for the prompt reply. I can only see 2 types of wheels and they look very different from original .... can you please help? Thanks
Mine old as i got mine after my grandfather died said when i was little i take one when dieds i got 1st same engine 20 or 30 years old skill runs
my classic B&S 35 engine is sound but the deck is not. Is there specific decks that i should look for to replace or is there a list of decks that is suitable for the specific engine. The deck i have on at the moment is castle garden made in italy but to many problems with it to replace all parts.
Many thanks ..Ian
ian Hi Ian it all depends on the length of the blade adapter. Take a look at Micks Mowers channel I think he's swapped some over recently! As long as it bolts on ok and the blade sits at the right height it should be ok. Leave mick a comment and tell him I sent you over!
Hi. Can the part with the two pins that hold the blade be replaced? I've sheared the pins off mine. Appreciate any help.
Yes search for blade adapter
@@MowerMan Thanks very much. Cheers.
hi mate my mower is the same as your one and i just picked it up im new to this, it runs but its like its on idle and ive noticed im missing a spring on mines, any chance i can conntact you asbout some general questions
not directly sorry. Links to springs in description