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The thing to remember here is the bulb is a purge, not a primer, so it pulls fuel from the carb, into the bulb and pushes it back to the tank, so if you have the pipes round the wrong way you will have problems, there are two pipes on the back of the bulb, a long connection which is the pressure side, so this is connected to the pipe going to the r/h side of the fuel , the short connection on the bulb is the suction side, so this connects to the carb, make sure they are connected up correctly, the tank vents a very reliable and give few problems, let us know how you get on.
Which model.? Certain Husqvarna saws have the fuel tank moulded into the back handle and are prone to getting damaged. Check for cracks and for damage to fuel lines and where the pipes enter the tank. If they are ok then you could have fuel tank damage. It could also be a leaking carb.
Sorry do not think you will find a schematic, however this is how it should be, the Mondo has a remote primer, so there are three pipes, a thin pipe with the fuel filter on the end in the tank goes to the carb connection closest to the alluminium pump cover held with a single screw, the other connection on the carb goes to the back of the primer on the shorter of the two conections ( suction side ) the longer connection on the primer ( pressure side ) goes back to the tank, this is the return pipe, so remember the primer pulls fuel from the barb, into the bulb and dumps it back to the tank, it does not push fuel into the carb
The port on top of the carb ( pump cover ) takes the pipe from the crankcase, this is the pulse to work the pump diaphram, the pipe with the filter on the end goes to the port lower down on the carb, the other pipe from the tank is the tank breather, it just pushes onto a plastic nipple on the orange plate under the carb, this pipe is only to keep dirt out of the breather but needs to be open .so the nipple is just somewhere to keep the pipe held.
Fuel gets to the carb via the fuel filter in the tank, the fuel hose up to the carb, and the impulse from the engine making the pump diaphram in the carb pulse and pump fuel, so start by replacing the fuel filter in the fuel tank, then check the fuel hose for signs of leaks, the impulse from the engine is fed through a pipe in the carb support block, you will need to remove the carb and block to inspect this, there is also a filter within the carb itself, this is sited under the pump housing of the carb ( alloy cover held with a single screw )
carb malfunction would fit,if your bike was carbed.07 up sm's are fuel injected.check fuel delivery.filter screen clogged,weak fuel pump,fuel contamination.or electrical/sensor. good luck
The fuel hose is all one piece from the tank up to the carb, it is just an interference fit in the tank, you will need to replace the complete pipe, the best way to do this is to **** the new pipe up the middle, about 30/40mm, take away one side of the pipe, it will now fit through the hole in the tank from the top, use a pair of long nose pliers through the fuel filler hole to grab the pipe and pull it on in, trim the end and re fit the fuel filter.
Start by changing the fuel filter in the fuel tank, if this does not help remove the top covers and check the impulse pipe to the carb has not become diss connected, let me know if it still is not right.
I think when you put the tank back on you caught the throttle cable.Take the tank back off and put back on watching that you don't catch or pinch the cable.
the tank thumbscrew on the left side is you reserve. it needs to connect to the petcock on the right side, across the carb to the top pipe. the petcock should have arrows on it (backside). the bottom petcock pipe goes to the carb. the carbs inlet pipe is on the right side and is adjustable...single screw in the center of inlet pipe allowing it to be rotated for straighter hose connection. that is depending on year of coarse.
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