Recent content by dougand3

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.