How A Briggs And Stratton Push Mower Engine Governor/throttle Linkage Is Set Up, And How It Works.




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L.L. Silvercloud: We got one of these lawn mowers with the Briggs and Stratton, and the governor springs are stretch, should I replace them, or just shorten them like you did? Can these springs be bought separately?

TRUx Voodoo: Fnaguitarplayer, I have a quick question for you: I have a 3.5HP briggs that looks similar to this. (It's a 1988 model 90702 3080) I just replaced the coil and I can't remember how the ground wire was set! It won't restart for me and I know I have it in the wrong spot. On my old coil, one wire was cut and I think the second one was hooked up somewhere on the linkage. I've seen videos where they talk about a wire being ran down under the flywheel, but I'm pretty sure that's the one that's cut on mine. Here's a link to the image, I just had it contacting the metal bracket where the fuel hose passes through but I know that it was wrong now. http://www.lawnmowerforum.com/attachments/snapper-forum/23022d1409020825-help-finding-engine-number-1989-snapper-hi-vac-dscn0066[1]-jpg 

Karl Kerbrat: Thanks for the videos there very helpful. My uncle gave me an old 3.5 b&s for my new place and it needs a little work. Its missing the rubber 90 that leaves the left side of the carb and goes to the air line to the engine. What is that for ? Been looking up all the videos i can and its just been mention a bit. Any help is appreciated. 

nonutsnorris: Hi.. Mine runs too fast and wont slow down! how do i fix that !

acinomed: Thank you so much for this video. I didn't have anyone around to help me today & mower stopped running right after going under a tree and it had always run kind of slow to be honest. Had no idea what the governor looked like. Got it all fixed up in no time. spring had come off completely.

Greg Cherry: TY for vid on gov vane . I hav a prob , 3.5 B&g push , it will idle fine but when i throttle up it dies instantly, any ideas, ran fine for bout a month

Ron Holder: Someone gave me a mower that has has a Briggs & Stratton engine with this governor/throttle assembly, or one very similar. The linkage was missing when I got it, but I improvised with a paper clip. I'm not sure the spring in there is the correct one; it seems too loose. Some diagrams I've seen look like there should be two springs, and the throttle bracket itself looks like it would accommodate two springs, but I only see the one in your video. I want to order the correct parts so it will work the way it should. Any more info? Thanks for anything you can share.

Arvind Mallya: Thank you so much my spring was loose and flopping around, this certainly helped me understand.

jayden rogers: i have an old rover easy start 35. the issue is that it is quite the opposite to easy starting. i have to tip fuel into the carboy and pull at least 5 times to get it started (pardon the pun). Not sure if its the primer button not working or something to do with inlet, but once its started it runs fine, doesn't miss and never stalls

urielitocd: Muchas gracias por la explicación me sirvió mucho!!!

Tiffany Chance: My mower will start then shut off. Do you happen to know any reasons for this? I have a Briggs and Stratton push mower.

john doe: Thanx a million 

Veejee: Where can I find the plastic arm that the governor/spring hook into? It got broken and I can't find one anywhere.

jamesb72: Thanks so much, mower running slow, and couldn't work out why, this is great help !

rs71355: Thanks for explaining that i wondered how it worked. I have a push mower with a briggs 6hp motor and its about 18 yrs old but still runs strong. Last year at the end of season it started revving up and down like the governor was pulsating, it starts out small then builds till it goes dead & would not start until it sat for a while. I tried cleaning the carb several times and would run fine for about 10 minutes then do it again, so i thought i'd put a new carb on it. I just put it on and it ran great for about 30 min. then did the same thing so i'm thinking something to do with the governor now maybe but didn't understand how it worked. Any thoughts on a problem like this. Like i said it started out of the blue last year. Any help would be greatly appreciated. 

Boss Playa: My pressure washer is revving like crazy up and down check my video out "karcher g3050 oh over revving" when i manually hold the governor in place it works fine why is my governor arm moving up and down like crazy?? and how do i fix it .... thank you sir for your help

mannymanano: Okay, thanks so much for your quick and helpful answer.

mannymanano: Thanks I did not know how those suckers worked.

C Harley: Thanks heaps for the explanation. U made it Real easy to understand

michael williams: hello sir i have a 3.5 briggs i checked the compression and got zero pressure but the lawn mower cranked up and ran any way could you please tell me what im not understanding here. thanks Mike

T Pope: EXCELLENT You don't know how much time, effort & head-scratching this video will save me- Clear concise information & I think very helpful. Nice one mate

fnaguitarplayer9: are you running it with a blade? if the blade is off of it they will kick back really bad! my engine here in this video has a heavy flywheel on it so i don't have to run a blade on it. but if you are running it on a stand like this, don't run a blade! use a old deck to test these motors with blades. thanks for watching!!!

fnaguitarplayer9: well i'm glad to help out! i noticed you subscribed, thank you. I'm a little slow on uploading new videos right now (i'm not at my garage until warm weather gets here, which it is now haha) so stay tuned for new videos.

Damian Towler: great video. the throttle mechanism had me beaten. i just couldn't believe that the arm mechanism on the carby was indirectly controlled by the throttle cable via a spring and a wind vane mechanism. amazing. and...yes....very confusing. great stuff. good man

effemall45: I've learnt quite a lot from your videos and recently had to take apart the whole dang engine and put it back together since the piston was almost floating inside the block. Not only did I manage to do this but the old beast started up pretty smooth as well. Only trouble is I can't seem to get the thing to rev high enough even tho I have adjusted the governor spring and I'm pretty sure the petrol/air mix is right. It revved pretty good before so I've run out of head to scratch, any ideas?

fnaguitarplayer9: Glad to hear my videos have helped out! First thing i'd check is revving the motor up by the linkage just to rule out a carburetor problem, just move the linkage where it hooks on to the carburetor, if it revs up good, the governor spring may be installed wrong or stretched, if it still doesn't throttle up bypassing the governor, then its probably in the carb, either out of adjustment or needs a new diaphragm, when revving it up like this, don't hold it high speed. thanks for watching!

reincarnatedman: Thanks for the explication, I've been wondering why my '35 spends time rising and falling when I start it. Now I'm off to put in a new cord, afterwards I can re-tension those springs and it'll be as good as new. Well, kinda ... Kind regards, Light.

fnaguitarplayer9: I hear ya! Glad to help out! Always glad to save someone money!!! thanks for watching!

janabeller1: I'm a chick with little mower knowledge and you just saved me a repair bill. Just now fixed it myself and runs like a million bucks! Thanks!

fnaguitarplayer9: Hey, it should be on the front of the flywheel shroud/cover above where the spark plug is, if not it could be on the side of the shroud above the muffler, anywhere like that on the flywheel cover, it will have a model, type and code. thanks for watching!!!

Andrew McEwan: Ya there great when there running if it is one I do not see a 2digit number beside the model number thanks for helping sorry that I gave you a tecumseh to try to help me fix :-) if you want I can send you a picture of the sticker on the mower because when I typed the model number in to Google I got 0 results :-(

fnaguitarplayer9: oh ok you just need the bolt. got ya! i've done that before, but it was so tight that i actually broke the carburetor itself!!! ... i'm trying to find a diagram for that, but i'm having problems there should be a 2 digit code after the type, I have probably 300 diagrams on my computer but thats not on it, so i have to go to briggs website which has changed and i have to have a 2 digit code. Ran into the same problem earlier with another engine haha

fnaguitarplayer9: Heard that! I ran into this a while back on a 5 horse briggs! Its the last thing you think of haha your welcome, Thanks for Watching!!!

foreverwood1963: A lot of hunts and surges are caused by dirty carbs versus bad governor adjustments.

Mark Almand: I have aYard Machines mower. It has the primer bulb style Briggs & Stratton 6.0 HP engine with a side mounted carborator. model # 123K02-0195-E1 Do you have a video on how the linkage works from the throttle to the carborator choke lever? Thanks Mark

fnaguitarplayer9: Sounds like the throttle cable is broke or came loose either at the throttle control or where it connects on the carburetor linkage, have someone move the throttle up and down and check at the carburetor to see if the linkage is moving, another thing, the cable clamp could be loose on the front allowing the whole cable to move. Thanks For Watching!!!

bousli809: Hi i have the same engine i found out the key was sheared and i changed it but still kickback any help, thanks

fnaguitarplayer9: no problem! glad it helped. i've had that happen before, a linkage gets in a bind or something that makes it stick haha thanks for watching!!!

M Romero: Help! I have a Briggs and Stratton Tru Cut (91232 1253 E1) that I took apart the carb and can figure out how to reattach the govonor and throttle linkage. Can you help?

fnaguitarplayer9: i would but i don't have a 4 horse, not sure if its the same as this one. it may not be on right, i had this problem on another push mower engine, checked everything then i seen i put the spring on the wrong part of the governor arm haha it could be a bad spring too, if they get to stretched they won't work. Thanks for Watching!!!

Bill Perry: I had the same problem as rdwngfreak. After trying almost everything I could find online, I finally paid attention to "could be a bad gas tank cap". Replaced it w/ one off another mower and it ran great! The gasket had gotten deformed. Thanks guitar player for the great videos!

fnaguitarplayer9: No, I don't really have any videos on newer equipment, I do have one on linkage on a briggs 13.5 horse (same as a 12 horse), which all linkages all use the same principles, so you might be able go by it, it has the auto choke, when you give the engine full throttle it hits the choke, so that might help you out, i'll send a PM with it attached... Thanks for Watching!!!

fnaguitarplayer9: @BoscoeFrance thanks! i hear ya. i do alot of guitar modifications and hope to start building from scratch. i love tube amps, i always wanted to build a fender twin reverb amp. glad the video helped! thanks for watching!!!

fnaguitarplayer9: Your Welcome! Always glad to help out! Thanks for Watching!

Jim Wisneski: Thank you for the awesome video, you have helped me to regulate my screaming Briggs which I thought was going to blow up!! Now I am back to a NORMAL RPM and can see many more hours of usage. Thumbs up my friend!

fnaguitarplayer9: hahahaha thanks for watching!!!

fnaguitarplayer9: sometimes you just can't adjust them out, hate when that happens. i got several of these motors that need carbs rebuilt, reason i haven't is i just don't need them all running, i'll fix them when i need them haha yeah that should be all it needs. no problem, glad to help, anytime!

fnaguitarplayer9: send me the model type and code off the engine and i can look up parts for you. thanks for watching!!!

fnaguitarplayer9: its probably a older one. briggs website is almost useless for looking up older engines, luckily i have almost every parts diagram for them. yeah sure, i'll pm you my email!

gary tennesen: HEY!! Just wanted jump in an thank you for your video!! I have been trying to figure out what to do with a B/S 3.5hp that surges and stalls "if" I get it started. Your video showing me what was under the cowling (the flywheel areas) gave me the courage to get out there and give it a shot -- I work on computers BUT needed your video to show what was under the hood of a small engine. FIXED. Previous owner installed choke/throttle upside down
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How a Briggs and Stratton Push Mower engine governor/throttle linkage is set up, and how it works.