first thing to do is check for fuel at the pump output… the engine runs but starves and so fuel is obviously in shortage.
tried openning the idle needle a bit more ??
Assuming the carb is all cleaned up and tested for air flow upside down and right side up to check the needle operation ….
did you do the side cover mod to get a pulse or the air pulse nipple mod behing the carb ??
Engine pulse to run the pump may be missing or inadequate for some reason
what pump was used mikumi,, OMC type square, or john deere round pump ?? post a pump picture if possible
believe it or not I once installed a square pump on a side cover but failed to properly line up the rear pulse hole !!! 🙁 behind the gasket
I did try opening the carb needle a little more but it didn’t seem to make much difference. After the carb overhaul and prior to installation, I did test the carb for float/needle seating upside down and rightside up – needle was seating correctly. I did the air pulse nipple mod to get my air source for the pump, which I’ve done on several motors with no problem. The fuel pump is for a Kohler or B&S engine lawn tractor with advertised flow rate of 4 liters/hr. but for the price I suspect it’s a Chinese made product. Thought I might swap it out to a Mikuni pump. I’ll try to include a picture of the pump but don’t know if will load.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp
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