If I had any hair, I'd be tearing it out.
Tricky question, and a long one, so read carefully.
Marvel Shelber TSX-952, w/anti-diesel solenoid on JD 219 in a 3300 combine.
On first startup this spring, it fired up OK but immediately started running rich and quit. Wouldn't restart. Thought it was a stuck float (I drain the carb over winter) but no. Pulled the carb, and disassembled, checked float and needle valve.. all OK, no sunk float, needle works OK, etc. At first I thought it was flooding over from the float bowl but it isn't in the way a stuck float would do it. It drools fuel from the throat of the carb, but it doesn't do it until and unless the engine is cranking. In other words, you can leave the ignition on, electric fuel pump operating, and no fuel leaks. The float bowl isn't flooding over. Soon as you start cranking the engine, it starts spilling fuel. It seems to be coming out the main nozzle (can't really see up the throat while cranking). The engine will not start and the fuel comes out worse when I pull the choke (of course).
Seemed like a good time to go thru the carb, so I got a full kit, including a new float. Thought I might see some problem (I was a car mechanic in the carb era, so I know downdraft carbs anyway). Didn't see any obvious problems inside. Carefully set the new float, and adjusted everything according to my manual and the kit instructions, reassembled the carb..... same thing.
Checked fuel pressure, and it's right on spec, 3 PSI. The needle and seat holds air, using my mouth. When I pull the carb, keeping the fuel in it, and pulling the top of the carb, the level of fuel seems to be about right.
As I said.. give me a Q-Jet, a Thermoquad, a Solex or an SU, I can deal. This carb is so bloody simple, I'm feeling like my status as master mechanic is swirling it the bowl. I can't believe I can't figure this out. Keep the shinola away, because I wonder if I could tell the difference ( : < ).
Any Ideas or can anyone refer me to someone who might be an ace on these carbs?
Many thanks!
Tricky question, and a long one, so read carefully.
Marvel Shelber TSX-952, w/anti-diesel solenoid on JD 219 in a 3300 combine.
On first startup this spring, it fired up OK but immediately started running rich and quit. Wouldn't restart. Thought it was a stuck float (I drain the carb over winter) but no. Pulled the carb, and disassembled, checked float and needle valve.. all OK, no sunk float, needle works OK, etc. At first I thought it was flooding over from the float bowl but it isn't in the way a stuck float would do it. It drools fuel from the throat of the carb, but it doesn't do it until and unless the engine is cranking. In other words, you can leave the ignition on, electric fuel pump operating, and no fuel leaks. The float bowl isn't flooding over. Soon as you start cranking the engine, it starts spilling fuel. It seems to be coming out the main nozzle (can't really see up the throat while cranking). The engine will not start and the fuel comes out worse when I pull the choke (of course).
Seemed like a good time to go thru the carb, so I got a full kit, including a new float. Thought I might see some problem (I was a car mechanic in the carb era, so I know downdraft carbs anyway). Didn't see any obvious problems inside. Carefully set the new float, and adjusted everything according to my manual and the kit instructions, reassembled the carb..... same thing.
Checked fuel pressure, and it's right on spec, 3 PSI. The needle and seat holds air, using my mouth. When I pull the carb, keeping the fuel in it, and pulling the top of the carb, the level of fuel seems to be about right.
As I said.. give me a Q-Jet, a Thermoquad, a Solex or an SU, I can deal. This carb is so bloody simple, I'm feeling like my status as master mechanic is swirling it the bowl. I can't believe I can't figure this out. Keep the shinola away, because I wonder if I could tell the difference ( : < ).
Any Ideas or can anyone refer me to someone who might be an ace on these carbs?
Many thanks!