MTD Honda Clone Fuel Delivery or 60 PSI Compression?

[dougand3]

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 Spring seems new & not stretched. Compression is only 60 PSI - is that enough? Thanks, Doug

 

[Auto Doc's]

60 PSI is good for and engine with a cam compression relief built in.

This favors a lack of fuel supply from the tank.

 

[dougand3]

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