Mgb cutting out when hot, out of ideas!

[SouthCountyMG]

Dbest92, has this problem subsided for good? I have a 71 Midget doing what seems like the same thing your B was doing.
Points, condenser (from Moss), coil, cap, rotor, wires, plugs, new electric pump and filter all did nothing. Cylinder 1 and 2 are running rich and have less effect on idiling with the wires pulled so Im thinking that carb is next.

[Mr Teddy Bear]

Don't know if you've sorted this?

Fuel starvation can be caused by dirt in the fuel causing the needle valve in the float chamber to either not seat properly when the float is trying to shut it off [causing the carb to flood], or sticking shut when the float drops.

The pin or needle should drop under it's own weight and not stick shut. When the needle valve is closed the fuel pump freewheels until a sticking needle valve is dislodged by a bump in the road etc.

[Db123456]

I was the original poster here and the issue was a faulty fuel pump overheating when warm. The pump was new hence being ruled out, so don’t rule out ‘new’ parts! Things like cheap condensers are of very poor quality these days and can fail after short periods of time.

My guess would be along the lines of what Mr Teddy Bear says above, maybe a hole in the carb float causing flooding? Or dirt/wear in the needle/seat?