I just bought a Bolens 1886, and was trying to get the engine to stay running without pouring gas down the intake... I pulled the fuel pump--the check valves were gunked up, so I cleaned them as best a could, and also checked out the diaphram--seemed to be fine. Put it back on.
When I disassemble a carb to clean it, I always run the needle valves in--carefully, and count the number of turns, so I can be close when I reassemble it.
The long needle valve that runs to the jet in the middle of the fuel bowl came out fine, though it is bent a little; the idle mixture needle valve?? the one between the throttle plate and the manifold, came out also. However, there was a tapered portion to the valve, but just a blunt end. Also, I couldn't get any carb cleaner to go through the hole that the valve screws into.
I looked inside the bore, and this is what I found--look just above the ball-bearing in the flange at about 5 o'clock.
The small, tapered end of the valve broke off and is protruding through the bore...
I tried to tap it back down-- no luck.... I tried squeezing with a pair of needle nose pliers-- it just broke off and that's that.
Is there any fix for this????