History: bought 2nd hand ... not running but dipstick smelled of gas. Cylinder was hydro locked with fuel (wouldn't crank either) Changed oil and cleaned plug... engine started and ran fine. Shut off, the next morning the fuel tank was empty and the oil was full of gas. I found the fuel tube o-ring was pinched and leaking above the float and bowl. Changed the o-ring and separator gasket.cleaned all jets etc. Now, no leaks but only runs on choke. Bought a new carb and it has the same results. Fresh fuel, new hose and filter, fresh oil. What next? This is a gravity feed system without fuel pump (Nikki carb)
Check the point where the fuel hose goes to the fuel tank
there is very fine filter in the hose that could be blocked preventing full fuel flow
only running on choke indicates insufficient fuel flow
Testimonial: "Fuel runs freely through the line. I checked by taking the bowel solenoid off .... draining about 2 cups of fuel out. Good flow also."
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For those who would like a laugh. I finally found the problem. As I said 2nd hand mower and not running. Apparently this mower was recently in the shop several times (found 4 shop ID tags under the hood). While servicing the carb, the mechanic .... STUFFED A SHOP TOWEL IN THE CARB EXTENSION PIPE and left it there. I only found it by taking the OHV head off (towel was sucked into the intake valve chamber). Just enough fuel and air to keep it puttering.
thanks for the infomation
that is one reason I always recommend accredited service centers as their mechanics are suposed to be properly trained
but I guess even the best make mistakes
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