I went through everything possible on my 16hp engine, valves, battery, connections, solenoid, spark plug, replaced carb. shutoff valve, etc. and it still started hard (turning over freely). SOLUTION which worked for me - the oil was just on the high side by just a smidge - I changed the oil but only filled it to just below the bottom line on the dip stick, and i'm talking a typing paper thickness gap below the low line. Engine turns over instantly and works great. The engine doesn't like to have too much oil in it I found. Worked.

I had this EXACT scenario outlined in this video with my 2008 46" Craftsman riding mower. Once I took the valve cover off, it was immediately evident that this was the problem. It took about 10 minutes to put the piston cap back on and tighten the bolt. Once I put everything back together, it now runs like brand new. Thank you so much for posting this video. You saved me hundreds of dollars in repair bills.

Thanks for this. Trying to repair my still brand new Murray with a Briggs PowerBuilt™ Series engine. I purchased this 2 years ago. It's still brand new cause I didn't even get 2 complete mows out of it before the carb butterfly broke and apparently the intake rod went through the rocker. Recently replaced the carb and rocker and didn't even think to check the stud. Not getting any movement on the intake to be able to adjust that. I think maybe the rod is bent. Stupid me didn't bother to pull it all the way out cause there's another part that has to come off to do so. This mower has been a nightmare, but it's forcing me to learn more about repairing small engines, so I have to be thankful for that, at least. Also, I learned from another video that the big box stores generally don't bother to make sure the valve adjustments, deck adjustments, etc., etc. are set correctly before selling them, and the factory obviously doesn't bother with these important aspects either, so the consumer buys them thinking they're ready to use when they really need to be checked over and adjustments properly set. No wonder there's so much disappointment with certain brands, even though most have the exact same engines, etc.

Thank you for this video. I had almost the exact same issue. 12.5 HP B&S on a Snapper. Suddenly started running rough and lost power and barely ran. It was blowing back through the air intake... seemed like a timing issue. I checked the likely suspects... spark and fuel but they seemed okay. I thought maybe a flywheel key but since the blade isn't attached directly to the crankshaft and I hadn't hit anything with the blade, I thought that wouldn't be too likely. So, I started checking the internet and came across your KZread video. The symptoms for your motor were very similar to mine. So I pulled the valve cover and sure enough the top rocker arm stud had backed out. Followed your instructions for repair and now it purrs like a kitten... if that can be said about a 1 cyl B&S motor. Thanks again!!!

Thank you so much!! I thought that I'd be sending it to John Deere. Did what you did an it worked like a charm!! I don't have the money for a new mower so you saved me some money. Thanks so much!!!!!!!!

Thank You!!! I worked on my craftsman Briggs 21 hp alllllllll day. It would just spin. Tried everything. Turns out my exhaust valve rocker came off because of a loose stud/anchor bolt. Tightened everything up and it started right up. I subbed!!! Thanks again

this video was dead on. I repaired my Briggs in 15 minutes. thank you!

This is EXACTLY what happened to my mower and this video saved my ass! Thanks!

By far the best video I've seen all the videos I've seen people just tighten them back up they never put any Loctite I'm glad you did when I saw you put Loctite on that boat it was so fulfilling

hey got it running i think it was the torque the whole time . i retorqued it and it fired right up. It still cranks a little slow but my battery is not the greatest. Thank you for all your help you are the god of all things lawn mower appreciate your time

thank's for the info on the valves, I have always had trouble with both of my mowers after one year. now they run like a new one you opened my eyes I was lost now I see the light thank's to you so very much I liked your video it helped very much good luck to you.

I would like to Thank You for posting this I had looked my 17.5 HP Ariens all over could not figure it out, I thought it was water in fuel. So drained and replaced along with a new spark plug. To no avail. I found this video sure enough same issue intake valve rocker stud had backed out and was the issue. Ty again you saved my temper from going out and buying a new mower and this one just turned 3 and has always been stored under cover. :)~

@AngelTorres-ck9sj

5 жыл бұрын

We

I thought this video said 10 minutes ago...10 YEARS ago. I see. Still perfect info.

Do not start engine for 24 hours. Thead lock has to be cured and min 12 hrs at room temp and just to be sure let it sit oil free for 24 hours. Now if you had a lot of slop in the treads due to rattling and backing out you would have to change to a thead coumpoud which holds when cured at a higher gap. Nice video on one of the caused of a loose or excessive valve gap.

Thank You, Thank You, Thank You!! Excellent video, this helped me solve the issues I had on my mower.

I have a B/S OHV 17.50 and I am getting way to much gas into the cylinder even setting re set Valves was my firs thought do you know what I may look at next ...thanks and you all are a big help to us old DIYer's

I enjoyed your repair and need to adjust my valves. Thanks

Thanks for doing this video... It was exactly what my problem was.

Hi Jeremy. I have an 18hp Briggs & Stratton single cylinder. After 7-9 minutes run time it boggs down and wants to stall out. If I either stop moving forward or disengage the mower deck it'll come out of it. I then can mower another 7-9 seconds before it does it again. I have cleaned the carb, ran Seafoam in the fuel, checked the gas vent for air flow, and looked at the spark plug. I used brake clean to verify no intake air leaks. Checked the fuel cut off solenoid (appears to be ok...I disconnected it while it was running to see if it would shut the gas off and it did, I also checked it out when I cleaned the carb). The last resort has been the secondary ignition water test. I poured water on the coil and then all along the spark plug wire. The engine spit and sputtered when the water was poured on the spark plug boot. I dried it off and checked with a grounded screw driver to see how long a spark would arc (approx 3/8"). Other than this being the potential issue, what else could cause the dieing of the motor? What gets me is that if I stop and disengage the mower deck for a few seconds I then can get another 7-9 seconds run time before it does it again. Please let me know what you think. Thanks! cjgraber74@gmail.com

Just Simply......Thanks for taking the time and making these videos.

thank you so much for this video this is what mine is doing and now it runs great

Wow I can’t believe nothing broke with how loose that was crazy…👍👍👍

Thanks for your video, clear and easy to understand. I was able to adjust my valves and get my mower running thanks to this video and save myself a bunch of cash!!! :-)

Thank you man, have the same problem with the Pony rider

Thank you so much for the lesson

Thank you this was a life saver.

Thanks for doing this...i learned a lot

Thanks for the vid. I may have to try this on one of my riding mowers.

Great Video Sir

Highly informative.

Good job mowermedic

I have a 21 HP Briggs Gold Series on a Craftsman rider. Week or so ago I mowed about 1/4 acre, shut it off and 10 minutes later it would only spin over and not start. Waited about 1/2 our and went to check on it and it started. I mowed about 3/4 acre and put it up. Few days later I went to mow and went about 200 feet and it just shut down. Thinking it was the fuel shut off solenoid I pulled it out and removed the little rubber tip. Started and mowed that 3/4 acre. I just put a manual shut off on it and called it good. Well, I mowed the 3/4 acre yesterday with no issues. Today I started to mow the front yard and I went about 200 feet again and it quit. Pushed it in the garage and checked to see if anything might be in the fuel tank. Pulled it and flushed it out. Checked to see if fuel was getting through and it was. Pulled the plug wire and checked the Magnetron and it tested okay. It isn't firing at all. Put a new plug in the plug wire and spun it over, no fire. So I pulled the upper shroud and unplugged the kill wire and tried it again. Still no fire. Just for grins I checked the flywheel key and it's fine. I notice when it cranks over I'm getting a little puffing out of the intake. That doesn't seem right.

Hi Jeremy, I have a B and S 21 Intek that has lost most of its power and is kindof backfiring or "puffing" into the carb on every stroke. I have adjusted the valves and even checked the shear key thinking i had a timing issue. (it was fine) I dont know what else to do. Thanks so much for your help !!

i believe i have oil seeping from my rocker cover gasket. i`m going to change it myself, first time doing this. can i change the gasket and not have to worry about the vales. makes me nervous because i`ve never adjusted valves and really just want to change that gasket and go

Thanks for a thorough explanation of the Briggs valve train. .05 thousands for valve clearance ? I set mine with my a little farther out. Seems to run a little cooler.

great job nd keep making them for there are a lot of doityourself out there now that our biyng power has gone down .

Thank you for the quick response

Well done!!

Great job! :)

Nice Fix!

Thanks Jeremy!

thanks for the info. my craftsman is doing the same thing.

great video

You need to check the valve clearance for your specific engine. A lot of the time the two will have a different clearance.

Hi there i really like your youtube channel.

I thought you where supposed to set valves 1/4 " after tdc?

Good lesson ... I think that's what my problem is too

valve adjustments are not warranty you are a lucky one!

Well good memory. It still starts like the valves need adjusted but they are where they are supposed to be oh well it runs thanks for your help

I think I may have similar problem on a 14.5 HP briggs OHV. My question is that cap you found, does it just snap back on? I have one that came off as well. I look at a parts list and I see it being called a valve keeper with the cap and a couple of split rings. Thanks in advance for any help.

very good, thank you

cub cadet twin cylinder runs great then it stumbles pops somewhat a touch of black smoke if I stop cutting for a moment it clears up runs good for a while new carb ideas needed only does it under load thanks

It's allright. It's better than recording with the image on the vertical :)

I just replaced the head gasket on my riding lawn mower. I put it back on and am now having a similar issue. One of the rocker arms is kind of tight and the other somewhat loose but not as much as in your video. Is it definitely this definitely the issue?

good video. My 15.5HP ( 2003 ) Intek overhaed valve assembly has an exhaust valve that is barely moving. ITs been sitting a long time. The pushrod when removed looks good as it is not bent or warped and rolls perfectly down a flat surface. The valve is not completely closing. It is stuck which is why it is blowing back. I will pull the cyl head and check it out. Question: Are most intek OHV engine head compatible? Can I swap one from a similar intek onto this 15.5HP?

Wish you had shown how to adjust the valves clearances for that’s the most important thing you could have shown. Thanks

im working on this same exact mower and i need to know the best way to find top dead center before we do the valve adjustment. the one im working with wont turn over because of too much compression. we found it will turn over with the spark plug out so i think it just needs a valve adjustment.

Excellent

Jeremy, thank you for you troubles. Have a B&R 19.5 that I purchased from a gentleman and it had a surge , when I was running it I ingauged the blades and it started smoking a Grey/ blue smoke and shut off. Now it will not turn over the full turn. What do I do .

I worked on this same engine in a craftsman lawn tractor but it backfires and pops through the intake. When I opened up the valve cover there was the valve stem cap laying in the bottom of the head like yours did but not sure if this has two or one? Does it need both to run properly? After I put it back on the bottom valve and reassembled everything it still pops.

Question . I have a 18hp Intek . It will start but barely . I adjusted the valves and when I try to start it I get a HUGE BOOM from the exhaust once I shut the key off... It is LOUD , so loud I have no idea why nobody has called the cops on my yet.. Any clue what this could be ? carb has been checked and cleaned as well.

No real damage, good :-) Good old locktite.

Jeremy I have a craftsman riding mower and the engine seems to be stuck,got any ideas on what could cause that?

Nice video. My problem is the engines starts great, rough idles in high speed setting, increases RPM in low speed setting and will remain at that RPM no matter where I put the settings afterwards. Carb rebuilt, all linkage connected correctly.

My valve cover is leaking oil pretty heavy. Going to change it, but do I have to drain oil before changing?

Hi just a quick question, I have replaced my rocker cover gasket 4 times now, the last 2 fitting a original b/s gasket. But no matter what I seem to do even with rtv gasket sealant as well it still leaks after 5/10 mins use,always at the bottom of the cover ??? please any advice would be grateful,Dean

i have a ( USED to me) 17HP briggs and the fuel solenoid leaks bad from the bottom, i have tried making a few different gasket, but it still leaks. i think my gaskets are sealing okay. but i see fuel dripping from the power and ground wire of solenoid. noy around my gasket. can fuel leak down the center of the solenoid , around the pin that goes up and down when the coil is energized?

At 3:17 in the video, my 17.5 Briggs and Stratton is starting to make that noise upon start ups. Except I have to lower the idle and then raise and sometimes the engine is stubborn and continues to make rough idle. The plug and air filter were installed recently. Could the rough idle on start up be the carburetor? It's an MTD riding mower that's 13 years old with 160 hours and never had carb worked on.

Hey mike, i have the same motor that u did the work on i try to start it and it pop's we adjusted the valves but still just get the poping what do u think it could be

I have a 12.5 engine built in 2007. Do you know what is the gap on the valves for this engine? Under the cover mine looks just like yours in the video. Which one is the exhaust? Mine seems to be spitting out of the carb. Thanks.

Morning I have a Briggs 12.5 IC Replace carb, new fuel lines, new filter, Starts fine then runs 5-10 minutes then runs rough, repeat procedure after letting engine cool, again same problem, Cleared Gas Cap for ventilation. Any thoughts?

My fly wheel will spin one full rotation then come to a HARD DEAD stop and wont crank over. I adjusted the Valves and resatrted it started up perfect on the first try, then the next day I go to start it, I get the same issue.turn key and flywheel turns till it gets to a sertain spot and Stops!! is it still the Valves?

Thanks for great video.. I have a Craftsman lt1000 LAWN TRACTOR with Briggs Intek 18 HP OHV engine. For a couple of seasons now it has been intermittently failing after warm up. It will cold start great then run at high or low rpm perfectly for an hour or so. Then when I idle down to empty bagger it sputters. Then it eventually dies right in the middle of normal mowing. Sometimes if I let it sit for a couple hours it will fire up and run fine for awhile. I've replaced the gas cap and the battery. When it is running at operating rpm the ammeter shows nothing and the voltage to the battery is only 12.6 which is probably the battery voltage. What do you think is the pro blem? Bad diode in charging circuit? Or some other fuel delivery issue.

I have a question why when I turn on the engine, the exhaust and the carburetor explode thank you

I have a briggs who intek set the valves .004 and .006. Then tried .004 on both and still want turn past the compression stroke. Battery shows full charge on charger and load tester. Anything I can do besides change the cam?

i adjusted the valves on mine and it starts but it is misfiring and popping back into the intake at high rpm. I clipped the carb fuel solenoid, cleaned the carb real good and installed a new plug and the spark is good and blue but im running out of ideas? hopefully you might know something i don't thanks

I have a 17.5 hp briggs starts good but is blowing lot of air out of the carb andblow power vavles are good, is it possible the compression realse is not moving out of the way when rhe motor comes up on rpms

I have a Craftsman tiller with a 7 hp Briggs & Stratton engine. There is too much compression to start with the pull rope. I am thinking it is the valve clearance, but I can't find what they are set on. Am I on the right track? If so what are the settings?

Wanted to find out what the issue is on the Troy Bilt when I get a puff of white smoke from the exhaust, and then not long after, I get black smoke coming from the exhaust.Engine did not sound great. I had checked oil before riding it, and even added a bit. Any ideas?

I have a troy bilt power washer with a B&S engine that won't start. When I pull the valve cover and pull the start cord neither valve moves. Any ideas? Carb, spark and coil have all been changed. Thanks

I'm getting fire and I'm getting gas. I adjusted the valves but it is still backfiring through the carburetor and exhaust. Do I have a stuck valve or do you have another suggestion?

sorry for the bad vid quality.....i wanted to make this vid and all i had was my dumb phone ;)

17.5 ohv Briggs straton on a troy built ridding mower. how can I tell if the piston rods or the pistons are going bad thank you tim

Just picked up an older Craftsman dls3500 and have a question. It starts, runs and mows like a dream but puffs a little bit of blue smoke on shutdown. What would be the most likely cause? Got the mower for free.

@THEMOWERMEDIC1

6 жыл бұрын

Valve guides are worn.

replaced bad cam in 17.5 hp engine, set timing mark dots on crank gear and cam, adjusted valves to specs at tdc spun without plug, tried to crank and got a bad backfire?

Watch my gas in oil video on the Murray rider I did a few weeks ago. As far as the engine reving too fast sounds Ike a governor issue or the throttle butterfly is missing or damaged

i got a 11.5 hp Briggs and Strat its on a snapper mower it starts fine cold but after a wile it keeps cutting out when its running and then dosent start up when its hot . and replaced the seat safety switch that help it a little , but now im thinking its more the magneto but idk any advice thanks

Like the video! I have a 15.5 OHV Craftsman version of a Briggs engine and having problems with gas getting into the valve cover area. I'm not sure what can cause, I don't see any cracks in the head I'm not sure if its a valve stem seal or seat who knows. Do you have any suggestions on trouble shooting this for repairs or any known causes? The engine runs and starts fine how ever it spits and pops after it warms up.

ok will pull flywheel off again and check it .Looks ok to me but then again im clueless and then i will re torque to 85 thanks for your help i will let you know what happens. By the way top valve is at 4 and the bottom is at 5. And i guess the top is intake so i was told

thats what she said!

question i replaced a valve rod like the one u pulled out i put everything back crank it over and booooom made a loud noise then i took spark plug out and smoke came out i pulled valve cover back off and everything looks fine i turned engine with my hand and its fine what could have happend

G'day Jeremy, Wow, you had a winner there for just a short amount of time working on it. I'd like to ask, I'm thinking of getting an MTD Lawn Tractor with the 22HP B&S V-Twin motor in it. From what I'm seeing and finding is that the Newer B&S V-Twin's are the way to go over some of the older model motors. I don't have a lot of experience in working on these smaller motors, I've done Ford Winder/Cleveland V8 motor stuff but now any lawn tractors. Any help or places I'm able to get workshop manuals to help me work on these motors would be great. Plus, any info or feed back to these motors would be greatly appreciated. I'm from down under Australia, Victoria. Again, Many thanks for anything you can give me on info with B&S motors etc. Cheers, Kev.

@Teddykhil

9 жыл бұрын

Buy a Victa 23/42 Better to pay the extra and get something that is well worth the price and brand. Great after sales service here in Ballarat, Victoria. Won't buy anything else. Others are too cheap. You get what you pay for. Victa all the way.

hi, i have a 12.5 Briggs and stratton mower on a toro horo chassis. Model 282707 for engine. its start very well. when its warm after cutting for about 20 minutes, she starts misfiring then eventually back fires then shuts down. The plug has fouled and it has black suit. what could the problem be.

I have a Briggs platinum 21 only the exhaust valve moves the intake rod does not move at all?

the specs are intake 4-7 th exhaust 5-8 th i like to use the lower end of the scale 5 and 5 is perfectly fine

I have a craftsman yts 3000 21hp Briggs and Stratton. One of the lifters is stuck when I turn the motor over it not go down but the other one will. How do I get it unstuck

@juliomena3106

3 жыл бұрын

I have the same issue ! did you ever figure it out ?

Hey I have a question. Why when I go to pull the string to start my blower it’s very hard at times ??

Ok i pulled it all apart again the key looks brand new but it does fit in to the slot pretty loose. Meaning if i hold the shaft a get a small wiggle in the key area not much but a little the key never comes out or anything.Is this ok or should i fill the void with something or find a bigger key thanks.

Dony I my neighbor has a tractor with same symptom but ihave try what you show in this video adjust the valves at 4 thou check the starter and spin with out the plug What Im Doing wrong thank you for your help Sr

Koehler command 17.5 is starts to miss a high throttle and is almost impossible to start. Is this a symptom of the cam loose. Gap is correct on plug.. Thanks