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I'll get some time on it today. Puzzling me. I get a strong 3 sec run, then winds down to stop. Gotta think fuel decrease. Will check for consistent spark but doubt coil craps out after 3 secs.

Good tip. Will look this pm.

Thanks, Auto Doc's. I'll chase fuel delivery.

11A-A22J766 mower. Engine is a Chinese Honda clone 140cc. I cleaned carb w/ USC = no joy. New carb installed = no joy. Valve lash good at .005 Int & Exh. I can only get a 3 second run - seems moderately strong. Sounds like fuel delivery, eh? Fuel line flows adequately out of tank. Governor...

Around here, I'd list for $90, then back off to $80. Back further down if no serious bites.

Briggs model #? Stamped in a valve cover or shroud.

What country are you? The manual for what country? USA 87 octane (R+M/2) would be 90.5 Octane (RON) in Europe.

You need engine model#. Will be on valve cover or engine block near spark plug. Eg: 126M02-1015-F1

Search that model # & find: MTD 753-06190 Carburetor.

What's the model #? If the fuel pump or metering diaphragm are stiff, they need replacement or get new carb. If you are referring to the Hi-Low jets, Low is always closest to the cylinder. Try 1/2 turn CCW.

Is trimmer Model #CMXGTAMDSS30? Lowes sells them. Go see a new one & check the fuel line routing. One port is is probably a breather of some sort.

Did you pull the drum/sprocket & look for obstruction between it & band? The spring looks elongated = some pressure in disengaged position. A new spring is cheap. Homelite 985240001 See how parts go together...

I think you're describing compression release. On most LT/GT and bigger engines, the camshaft has an arm that bumps the valve at low RPMs. This allows the crankshaft to spin faster & start/run. Cam arm slings out of the way at higher RPMs for full compression.

Agree re: plug out & grounded. Try another plug, too.

How do you set the coil air gap? I use a business card between the coil legs & magnets. Can you do a visual check on the timing? Flywheel key has sheared - can be just a tiny bit. No other answers - pull FW to check well. You have fuel/air, compression & spark - gotta think timing.

An easy way...business card on FW magnets. Loosen 2 coil screws. Let coil legs slam onto magnets. Tighten screws. Check that FW doesn't hit legs on rope pull.

Remove spark plug. Rotate crankshaft till piston is coming up. Stuff some rope on top of piston. Unscrew clutch CW.

If weight not increased - great. I have 2x FS55 and run them hard. They just scream.

It may run factory new if carb & fuel lines are good....for a while. Then you use it with an engine tilt and oil slinger/dipper doesn't splash oil. P, R & C are oil starved and start scoring - compression drops. I'm just a hobby mechanic but I've learned to steer clear of tiny MTD 4 strokes...

Hammer is saying read this: https://www.lawnmowerforum.com/threads/engine-oil-for-honda-hrn-216-vka-push-mower.70083/ Naw, don't spend extra.

Small barrel carbs. I had one that the rotating barrel was worn and let too much fuel thru. Do you have a Throttle screw on carb? (I don't recall one). I had to get new carb.

Hopefully somebody who's worked on one will chime in.

Sounds like the clutch for reel cutters is stuck engaged. Does clutch handle operate properly? Does wire inside cable housing move back & forth? Take pics of where the clutch cable enters clutch near cutters.

What is always spinning - drive rollers or reel cutters?

Check in here: https://oldlawnmowerclub.co.uk/sites/default/files/opmanual/Atco%20Commodore%20B14-B17-B20.pdf

bertsmobile1 wrote this in: # 15 https://www.lawnmowerforum.com/threads/brigs-mower-will-only-start-with-starting-fluid.38149/page-2 remove the carb and with a spray can of carb cleaner , WD 40 or similar that has a long nozel on the trigger, spray fluid backwards down the carb through all...

Choke butterfly fully closing? Was cleaning - disassembly and passages open? 2 carb bolt holes open?

Engine model #? 12xxxx-?

~10 years ago, when I had these internal parts failures - it was $140 in parts.

Is this your unit? https://www.ereplacementparts.com/homelite-ut08544-vac-attack-parts-c-18807_18808_139650.html They don't part lower than a short block and then say it's NLA. These are really cheap engines and will have some slop. Think a C clip beside con rod would grenade engine if slung...

Look at camshaft 46 in IPL. 2 teardrop lobes push rods for valves. The cam gear mates with crank gear. Cam gear could have jumped time. Also, 43 Oil slinger/gov can blow up. Can't tell from IPL but cams can have a boomerang compression release - spring loaded and clears away at run RPMs. It can...

Landline telephone wire works well for carb holes. But if you can't put fuel in plug hole, re-insert plug, pull rope a few times (maybe 10x if floody), and get a 2 sec run....it's not an air-fuel problem. Think compression or spark/timing problem. See if valves work.

Engine model #? Years ago, I had a 12S912 on a pressure washer. IIRC, it was gov/oil slinger failure with camshaft damage. Pull the valve cover and see if valves operate properly. Do both valves close as piston approaches TDC on compression stroke? Also, did you wire the the carb jets/orifices...

Internal carb passages are probably partially clogged with varnish or debris. Esp if you use ethanol gas. Need total carb cleaning - disassembly & parts washer. Inspect needle & seat. Carb is Tec 640330. Probably NLA. You can search for an AfterMarket replacement and match it. Why change the...

Measure your HxWxD. 3.54 x 2.76 x 3.98 inches is a standard size. Search online for 12v SLA battery (3 or more Ah). You'll need to cut your old connector off & attach to new terminals.

Engine spins Clockwise from top view (think about pull rope). Did engine stop suddenly as hitting an object? Could be flywheel spun - check key alignment. Have you tried carb spray/pblaster in carb throat or plug hole to see if it burps and 2 sec run? If so, may be debris in bowl, bolt holes or...

Example: this probably only needs bowl cleaned & bowl bolt wired out.

Most (maybe all) Briggs 12 mower engines will bolt to your deck w/ 3 bolts. The differences will be Autochoke vs primer bulb & others. Some older engines will have a throttle cable to the handle (avoid). Study your IPL 121S02-0130-F1 and compare to potential swap IPLs. I have 126M05, 126T02...

$950 is ridiculous for a push mower engine. Around here, you can find mowers w/ a Briggs 12xxxx engine for $20-$60 that just need a carb cleaning/rebuild or a new carb. I like those engines - have them on multiple mowers.

It may be this transaxle: Read the Peerless blogspot https://www.lawnmowerforum.com/threads/peerless-205-024c-hydrostatic-transaxle-sluggish.75263/#post-477328

See if you find your mower here: https://www.partstree.com/brands/yard-king/walk-behind-mowers/

My Deere lower cute is 7.25" OD.

Engine model #? Eg: Briggs 126T02 1223 F1. Tip over oil dump needs 45-60* incline...did you go that far?

The carb bolt probably has both vertical & horizontal holes. Did you run a small wire thru them? Another passage is vertical stem into carb throat - it needs to be patent. Engine model #? Probably on shroud above muffler. Also, Pull spark plug and sand or file tip, esp between electrodes. With a...

Synthetic 20W-50 Engine Oil seems the most popular for the hydrostatic side. (I didn't mess with 90W gear oil side.) I pulled the transaxle. Emptied broken down oil and cleaned gunk out of reservoir. The rubber bellows was in good shape. Filled with ~ 1.25 qts 20W-50. Runs fast & strong now...

Kill wire to coil could be partially corroded and weak signal delivered. What is engine model #?

Thanks, StarTech.

Neighbor brought this Murray Select Wide Body LT with above tranny. Engine is Briggs Opposed Twin and runs great (it's a repower). Tranny was packed 1" deep in dirt. Mower is slow and can't make a 10* grade. Sound like Tranny fluid has broken down from heat? I can pull transaxle & replace fluid...

Model # will help. This is a 2 cycle cube carb? It's new, but has it been adjusted? May be too lean.

Pull the spark plug. Turn the flywheel screen by hand (or can VERY slowly pull rope). See if piston moves up/down. A screwdriver in plug hole can indicate piston position.