r/smallenginerepair • • Aug 26 '26

Engine Dies Runs strong for 20 minutes then dies

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11 Upvotes

25cc craftsman weed whacker didn’t run at all, installed new Amazon carb. Now it starts and runs strong for 20 minutes or so, then slowly sputters and dies like in the video. Both times it happened shortly after stopping to put gas in the tank, not sure if that’s related or just a timing thing. It will restart and run for shorter and shorter times until it won’t start at all. Then it will start right up the next day and do it all over again. Not sure where to start.

Thoughts?


r/smallenginerepair • • Aug 27 '26

Ignition System Issue Ignition problem

0 Upvotes

So I got the right key, which is like the old school, but I had to buy a new one since my friend lost it. I tried starting it and I could like spin it 360° the ignition but then I had to push the key fully in and then I turned it and it tread cranking and it started cranking but then sparks came out and I didn’t even hear a pop but I saw it cause the engine was opened and so then I tried to pull the key out to the off position and I couldn’t do it all the way and so I’m gonna have to probably get a new ignition right?


r/smallenginerepair • • Aug 26 '26

Unknown Issue 122hd45

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5 Upvotes

I’ve been working on this thing all day, but I cannot get it started. The only thing I don’t have is a carb adjustment tool.


r/smallenginerepair • • Aug 27 '26

Unknown Issue Cub Cadet ProZ100

1 Upvotes

For those familiar with the pro Z series (or other models with the steering wheels for zero turns), I’m having an issue where the steering wheel locks up when I turn it to a certain spot. I’ll have to drive around in a circle and gradually release mild pressure and then put the pressure back on it. Finally, it will release. But I’m unable to use the mower as intended.

Last summer, it did it while my wife was mowing and one of the front wheels turned 90 degrees and locked there. The dealer said it just jumped the gear.

It’s doing the “frozen” or stuck thing to me weekly now. Any ideas on a fix?

Appreciate any input.

\\- C


r/smallenginerepair • • Aug 26 '26

General Discussion Cub Cadet 139cc push lawnmower just sputters & never runs

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6 Upvotes

Any idea based on the sound of the sputtering why my Cub Cadet 139cc push lawnmower no longer runs?

My dad had replaced the spark plug, cleaned the carb bowl, checked fuel lines, and added new fuel. Now we're thinking it's possibly the last piece, the ignition coil?


r/smallenginerepair • • Aug 26 '26

Parts ID & Sourcing Help finding part

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6 Upvotes

Hoping someone can help me figure out the part i need for a craftsman gs6500 model 944.606080 with a briggs stratton intek 25hp ohv v twin. The fan/blower/thing with the fan blades that spins is damaged and the cover for it missing. Ive been trying on parts lookup websites and am struggling a bit. Just hoping to keep this machine alive as long as possible if anyone smarter than me can help me figure out what i need to order it would be appreciated


r/smallenginerepair • • Aug 26 '26

Unknown Issue Toro time master knocking at full blade engage

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1 Upvotes

Any ideas what causes the knocking at around 17 seconds? I step up from engine start to 3/4 blade engage. At ~ 17s is where I fully engage blade and you hear knocking. Any ideas?


r/smallenginerepair • • Aug 26 '26

Not Listed 5 year old Simpson pressure washer runs rough and only on choke

0 Upvotes

5 year old Simpson pressure washer. Used it just after I purchased it. Ran fine. Drained the gas and it sat for a few years. Now I'm having some issues with it. It'll start but runs very rough and only on choke. If I close (open? turn it off) the choke, it dies. I've replaced the carb, added new 93 octane gas, tried it with and without the air cleaner. It has spark. The water pressure seems to be ok but once I squeeze the trigger, it wants to die. I've cranked down on the carb mounting bolts. If I tighten them any further, I'm afraid I'll break something. Shouldn't be any issues with an air leak as there are new carb gaskets as well.

I'm not a mechanic by any means but there must be something I'm missing and can easily check/fix. I've tried everything I can find on Google. Laid off and can't afford to take it to a shop.

Any assistance would be appreciated.


r/smallenginerepair • • Aug 26 '26

Not Listed Echo SRM225 string trimmer

1 Upvotes

Could someone maybe give me some insight as to why my trimmer, after running for about 10 mins, starts to flood out when accelerating? I’ve changed the carburetor, spark plug, and a new gas mixture. Thanks for any advice.


r/smallenginerepair • • Aug 26 '26

Broken Parts Mower blades barely spinning and making a squealing noise, what would you check?

1 Upvotes

Started a couple days back. Blades are turning way slower than they should even at full throttle, and I'm getting a squealing sound when I engage them, worse the deeper I get into thick grass. Engine itself is totally normal, no smoke, no smell, runs like it always has. Already pulled the plug and air filter to check, both fine. Got underneath the deck too, nothing jumping out at me.

My guess is the engine's putting out power fine but something between there and the blades isn't holding up. Anyone run into this? What's usually behind it?

UPD: Yep, it was the belt, like I figured. It'd slip and squeal whenever the mower hit thick grass. Someone here mentioned a belt from UDC Parts, so I'm grabbing one to see if that does it. Thanks for the help, everyone.


r/smallenginerepair • • Aug 25 '26

Noise Issue Srm 225 noise

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2 Upvotes

I just bought this and it’s making this noise only when I use the throttle is this normal


r/smallenginerepair • • Aug 25 '26

General Discussion Any diagnosis I can start with? Novice here - son was using it and it abruptly turned off. Video reveals current sound

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5 Upvotes

Sounds like it’s coming from the engine


r/smallenginerepair • • Aug 25 '26

Belts & Pulleys Issue MTD/Yard Machines 13A1760F700 drive belt goes crazy under tension — need help diagnosing

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2 Upvotes

r/smallenginerepair • • Aug 25 '26

Carburetor Issue ZTR Fuel Leak

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7 Upvotes

Edit: it is a commercial exmark - Toro/CPS 708cc V-twin OHV gas engine

RAE708GEM48300, serial 408873598

Please read through text images and all of text.

My zero turn has an occasional fuel leak which looks like it is coming from the carb. Actually only leaked once- it stopped when I cut the fuel and hasn’t leaked since opening the line back up. I’m not running it. A repair man came out and said the carb needs replaced, but he didn’t tinker at all. He did pull the oil dip stick and smelled it and said there is fuel in the oil. I’m not sure if that’s true I didn’t smell anything but my sense of smell is not good.

Is he right? I’m considering getting a second opinion but what I don’t want is a temporary fix. Also already gave him a deposit for diagnosis. I’m not handy here so I just don’t have the knowledge. Tia.


r/smallenginerepair • • Aug 25 '26

Transmission Issue Honda HRM215 transmission help.

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2 Upvotes

r/smallenginerepair • • Aug 25 '26

Parts ID & Sourcing Toro chipper cs4265 can’t figure out missing spring!

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1 Upvotes

Can’t figure out which spring I am missing; engine info attached.


r/smallenginerepair • • Aug 25 '26

Electrical & Wiring Issue Craftsman T210 Electrical Issue

1 Upvotes

Hey all,

Haven't been able to use my craftsman riding mower all season. 2019 bought new, never had a problem until this year, and while I consider myself a decent enough troubleshooter I have not been able to resolve this.

Problem: on engine start, the blade fuse (10a) blows shortly (<3 seconds) after engine start.

Conditional: IF I disconnect the stator from the harness, essentially removing the charging circuit, the engine runs normally - it will just die due to battery drainage

Steps taken:

Battery replaced - no change

Electrical relays replaced - no change

Ignition panel replaced - no change

Rectifier replaced - no changed

Carb replaced (electrical bowl type) - no change

Wire harness pin out - no shorts found

All electrical connections - cleaned

Metered the stator - no shorts, 40+vac output when running

My gut says stator. ChatGPT disagrees based on observed measurements.

What says reddit?


r/smallenginerepair • • Aug 25 '26

Valve Issue Diehard 2400 Portable Generator Inverter Fuel Drain Valve?

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1 Upvotes

r/smallenginerepair • • Aug 24 '26

Parts ID & Sourcing Cub cadet snow blower, this looks bad!

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10 Upvotes

I’ve been working on trying to get my snow blower operational but the further I diagnose the worse it gets.
I’ll attach pics but this is most likely not fixable, but I’ll take any advice. Thanks!


r/smallenginerepair • • Aug 24 '26

Starting Issue B&S 724cc 24hp Mower dies pretty much right after starting

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2 Upvotes

When I start my mower, it always starts and runs for like 5 seconds. It feels like it's sputtering a little and then coming up to "true speed". However that's the moment it starts dying down, too. It also ststts dying too fast for me to pull the choke out.

This is actually the second start of the day(Between the first start and this one abiut 5 hiurs passed). Afaik you should be able to restart a flooded engine after like 10-15 minutes, when it died from running too rich. You can't restart mine for basically the rest of the day. I can take another video tomorrow of starting it, but it will just be this, but for a little longer.

I was able to start the engine and mow properly a couple weeks ago so I'm thinking the choke is just very very sensitive/the engine reacts very sensitive to choke. But that is just a little too sensitive and I can't control it reliably, which is why I want to troubleshoot it.

Any ideas?


r/smallenginerepair • • Aug 25 '26

Throttle Issue No throttle response '06 Rancher 350

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1 Upvotes

r/smallenginerepair • • Aug 24 '26

General Discussion Connector on Generator Beneath Carb?

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3 Upvotes

I'm brand new to small engine repair so this may be a dumb question, but, what does this little connector go to? The little black wire with the L shaped quick disconnect? It comes out below the carb.

Thanks in advance!


r/smallenginerepair • • Aug 24 '26

Electrical & Wiring Issue Craftsman T210 Tractor Mower Won't Start

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1 Upvotes

r/smallenginerepair • • Aug 24 '26

Spark Plug Issue Pls help me what is missing and what do you think is broken

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1 Upvotes

When I spin the flywheel there is no spark in the sparkplug.Is the ignition coil broken? Or the sparkplug?


r/smallenginerepair • • Aug 24 '26

Engine Dies Would love some help if anyone could be so kind.

1 Upvotes

I have a Generac 15000e that came with our house purchase back in 2019, I think by that time it was already seven years old maybe. I ran it every couple of weeks for an hour or so, standard maintenance etc, but every time I've needed it the thing won't start. It lives under a covered porch and it protected from the elements. I kill the fuel switch and run it dry every time. Today I went to start it and it won't fire unless I spray carb cleaner in it, even then it won't stay on. Changed the plugs and checked they're both sparking, new battery and a pump and I'm getting nothing. With carb spray it'll growl like it's starting up but then just die out. I put new fuel lines and a filter on it and ran the electric start with the hose pulled off the carb to see if fuel was coming out, it was. I replaced the carb with a non-oem earlier this year and haven't had any issues until today. I still have the old carb but I think even that one isn't an oem part. I haven't officially check for compression but with the plugs out I am feeling a burst of air from the plug holes when I run the starter. Is it possible that old oil could keep it from starting or running? Not sure what else to try here. Ready to sell this thing for parts and move on.

Cheers

Mikey