Riding Mower Bogs Or Dies Under Load, Easy Diagnosis / Repair When There Is No Power Or Runs Rough
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- Опубликовано: 25 янв 2024
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We normally get symptoms of this including: Rough or uneven running, the engine bogs down when the blades are turn on or when going through thick grass, there is an unburned raw fuel smell when starting or after turning it off, low power / no power, the mower dies when the PTO or deck is engaged or the engine is making a terrible noise.
We check out the fuel system to see if the bogging issue is caused from bad fuel, lack of fuel, a blockage at the fuel pickup tube, fuel line or filter.
We also check out each cylinder on the mower to make sure they are working independently because this is the most common cause of bogging down or low power in a mower
Poulan Pro 700EX Riding Mower 960420005 00 PBGT22H48
Briggs & Stratton 26 HP Intek engine model 445877-0760-B1
This style is the same on many of the Briggs & Stratton Intek V Twin engine and we go through the full diagnostic process and show how to repair with tips and information.
We love how well these Briggs & Stratton engine run!
If one cylinder or the other is not sparking, then track it down and find which coil or kill wire is the issue.
We go over an issue like this at • Riding Mower No Power,... on a Briggs & Stratton v twin engine similar
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Exhaust push rod part number 690981 ( 597785 ) can be purchased at amzn.to/48QVjQu
Spark plug part number 491055T can be purchased at amzn.to/48IBZ7A
Spark plug Briggs & Stratton gold 694385 can be purchased at amzn.to/48Mcz9f
Rocker cover part number 690971 can be purchased at amzn.to/3TIOSdq
Ignition coil part number 592846 can be purchased at amzn.to/3S52Kxc
Head gasket part number 693997 can be purchased at amzn.to/3Oj8MIB
Lisle compression tester can be purchased at amzn.to/3OkPlPn
OTC leakdown tester can be purchased at amzn.to/47PSXjp
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#poulanpro #craftsman #briggsandstratton #smallenginerepair #individualizedrepair #smallbusiness #diymaintenance
About Us:
My name is Martin. I have been repairing tools and small engines for almost 20 years. We operate a small engine repair shop in Illinois. We service / repair Briggs & Stratton, Kohler, Kawasaki, John Deere, Cub Cadet, Toro Tecumseh, Loncin, Honda, Craftsman, Husqvarna, MTD, Troy Bilt, Simplicity, John Deere, Exmark, LCT, Generac and many more brands. We work on riding mowers, walk behind mowers, snow blowers, zero turns, generators, pressure washers and much more. We normally repair about 3,000 pieces of equipment every year and look at many more that are beyond an affordable repair. Hopefully our videos will save you some money and give you the information you need to work on your own equipment or figure out the issue at hand.
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Please be careful when repairing any piece of equipment and follow all possible safety measures. This video is for entertainment purposes only. 
Хобби
That engine has a really nice tone to it, once it’s running correctly. 🔧👏👍
Thanks! I thought so too!
Great diagnostic algorithm! I differ in that if the engine has run long enough to get slightly warm I feel both valve covers to see if they are both contributing. That way I don’t need any tools to start. I found the same clean spark plug on one lawn tractor. Turns out the magnetos were rust jacking so I replaced both.
I appreciate that! Definitely a good way of doing it, to feel each side. One of the other mechanics uses the infared heat gun for the same thing and says he'll never do it another way. Thanks for watching
Great video. Informative and concise. Thankyou.
I appreciate that! Thanks for watching!
Very informative video. Keep them coming please. 👍
I appreciate that! Thanks for watching!
good video
Thanks for watching!
I got that same seat... I took that switch off and I thour it across the room.... what a bad idea....
Definitely!
A friend of mine had one dead cylinder on a 2 cylinder engine . Push tubes bent , determined his small light weight daughter mowed the lawn . She constantly bounced the seat safety switch off and on miss firing the engine causing this failure .
I have seen this happen a lot with things shutting off but misfires or timing being cut and re-connected can cause all kinds of issues. Thanks for watching!
Issue- valve guides moved. Valve actuates pushing guide back down in head same time bending pushrod or twisting rocker. Pop off springs and measure guide heights and check seal. My remedies is to remove head, drive out guides, cut groves in guides just below top surface of head. Reinstall guides and stake aluminum into grooves of guides. Heads will last life of engine. What causes this is heads getting too hot due to blocked cooling fins or lean conditions from intake leak.
Somebody installed the bottom rocker that way on this one but great tips! Thanks for watching!
Very thorough diagnostic and repair; fixing to go pick up a Poulan Pro 46in deck with the 20HP v-twin for $50. Owner says he stopped using mower after it started bogging down while cutting grass, I am suspecting a cylinder issue, looking forward to doing my preliminary checks like you did when I get it home this evening:-)
Awesome! I love getting a good deal on mowers! Would be interested to hear how it goes. Thanks for watching!
@@IndRepair Update on $50 Poulan- cylinder on “oil filter side” of engine had two bent push rods and exhaust valve guide walked out. Going to try “set screw” fix for the valve guide as shown on Taryl Fixes All video and worst case, fall on my own sword as I plan to use this mower as my personal one if it fails. Like most $50 mowers, this one was severely neglected and barely had oil touching dipstick.
That is awesome news!
i happen to have one of those myself....the exact same one with a no start issue...spins freely but wont start...its a 2017model i bought new and ive never done a valve adjustment so thats where im starting.
@@kevinhanshew3703 Definitely check the valve adjustments. If you have kept the oil at proper lever, you should not be too far out of adjustment mush less have any bent pushrods:-)
how do you know whether to adjust the nut or the stud on different engines, i see some that say loosen the jam nut and and adjust the stud and other videos say loosen the stud and adjust the nut
thank you for your videos they are very helpful
Whatever is actually spacing the valve needs to be held stationary whatever is used to cam it is turned while the stationary piece is held in place. In this example the Torx bolt is what tightens against the valve so it is held in place while the nut is tightened to keep it where it was. Sometimes you have to adjust the valves multiple times before you get it just right, I just got lucky on these.Thanks for watching!
thank you very much that helps a lot i appreciate it @@IndRepair
@@bobkernahan6340 glad to be able to help!
That helps to hear the engine noises, thanks. Ł I noticed you didn’t put any thread locker, just torqued. Is that common?
Blue loctite is common to use (manual calls for it) on the threads but in my opinion does nothing to help the bolts from backing out due to the major temperature difference the head goes through. Even after cured, the first time you fire up that engine the bond breaks
@@IndRepair thanks, always wondered if blue was even useful.
@@steveriggenbach90 I wish I would have remembered that Briggs recommended this in the repair manual, I would have mentioned it in the video and the reasons we do not use it. Thanks for watching!
@@IndRepair you give us hundreds of pcs of information. Hard to remember everything.
Nice job , no bs good video
Awesome video. Where are you from? Been watching your channel for a while now. lmk.
Thanks for watching! We are in Illinois. I appreciate the comments!
I use threadlocker on the valve studs.
In my opinion it does not matter either way. The high heat, oil and fast temperature changes will render the loctite useless pretty quick. Thanks for the feedback! Thanks also for watching!
I have almost all new parts on my John Deere D140 and now it seems it has lost some power because it seems to be bogging down when I hit some thick or higher grass and almost seems to want to shut down unless I slow down.....I have wondered if the drive belt could have anything to do with this because I did notice it has some big cracks all along the whole belt....but after doing a google search it seems nobody is mentioning the drive belt for problems such as the engine bogging down and wanting to shut off when I hit thicker grassy areas and higher grass......was wondering if the transmission/drive belt can be the problem?
I have never encountered this issue, unless it is wrapped around wrong it should not cause a problem like this at all. What all did you replace? OEM or aftermarket parts?
@@IndRepair thanks….I’m thinking maybe I’m running on one cylinder if that’s possible. It is not just when I get into high or thick grass. It’s all the time and just wants to shut down in the higher grass.
@@JEFFQUICKLE9 It could definitely be running on one cylinder disconnect one coil at a time and ground it out to see if one is not running independently
Wow 26hp that was probably the selling point !!!
I am sure it was!
👌
Thanks for watching!
Do I see a crack in the head right behind the exhaust rocker? Could just be a mold seam but it sure looked like a crack on camera.
You talking to the bottom left of where the aluminum comes up to the mount? If so that is a seam, yes
@@IndRepair yep that’s it.
They come up quite a bit in these blocks for sure
@@IndRepairhappy new year 2024!!! I'm glad to see your videos again!!
@@breannaoliver6316 happy new year to you also! Thanks for watching!
Tell me you adjusted the valves on the other head, changed that plug to match and changed the oil. If not, that's not acceptable.
We always take them all the way. Thanks for watching!
Also the possibility of the head had overheated at one point and the valve guides moved would cause bent pushrods as well! The intake was bent and you never determined what bent it!
It was determined what bent it. The exhaust valve rocker pivot was installed inproperly. Things can't heat up and warp if they don't run. This horrible mistake made the exhaust valve never close
if i was pulling the valve cover off i sure would have cleaned some of the dirt and grass off of it first. But I'm a professional.
Yes sir
If was a very good video. Thank you. I did mean to say I'm not a professional, but my finger got ahead of my brain.
I understand! Either way I just try to help people with the process sometimes I get out of my standard work mode since I am trying to do a video on it. Some of them are not good and you will see me make mistakes. I think they are getting much better. Thanks for watching