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Press primer until fuel fills bulb and flows out carburetor. If no fuel in primer bulb then check connections.
Check fuel line connections by disconnecting retun line to tank (without filter) and pressing primer bulb. Fuel should draw from tank (filter), into bulb, out bulb to carb and expel out carburetor. If not the bad lines, filter, or lines not connected correctly.
With fuel primed, turn both high and low speed needles in (CW) until seated, do not tighten. Then turn needles out 1 1/2 turns for initial settings. These settings are only to get unit running. Increase idle speed setting if engine stalls. Adjust low speed, then high speed and lower idle speed back to normal.
See page 20+. These saws are notorious for flooding at start. If it doesn't fire by the 3rd pull, stop, remove plug. If plug is wet its flooded. If dry, no fuel and as always, check it has spark.
I expect its flooding... a quick way to get the cylinder and crankcase cleared is to remove the spark plug AND AIR FILTER. Use low pressure air (~10 psi) into the plug hole for a few seconds. reinstall plug. Follow starting instructions.
If it floods again, repeat clear cylinder/crankcase, and follow starting instructions but don't use decompress.
I have no diagram but here are the instructions on how it goes. The small diameter line out of fuel tank (has filter in-tank on end) connects directly to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then "pushes" any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Again, on the primer bulb, the longer nipple has a line going directly from it to the tank. This is the return line. The shorter nipple on the bub has a line from it going to the metering chamber side of the carb. If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where sometimes the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank. Otherwise, the line should enter the tank for about 1/2" or so.
Who connected these hoses? the normal routing for a machine with a primer is like this, the fuel hose from the tank with the filter on the end goes to the carb fuel inlet nozzel ( not to the primer ) nearest to the pump cover ( cover on carb held with one screw ) the pipe from the metering side of the carb connects to the shorter nozzel on the primer bulb ( suction side ), the longer nozzel on the primer ( pressure side ) connects to the pipe going back to the tank, just remember the primer pulls fuel from the carb,into the bulb, and pushes it back into the tank, it is not actually a primer it is a purge. because it is connected this way it is impossible to flood the engine no matter how many times the bulb is pressed. Let me know if it starts and runs.
Does it have spark? Yes not coil!
Replace the plug (very inexpensive) Ignition Coil Test by SmallEng.com http://www.youtube.com/watch?v=L7WNBDRG4C4 You may need to use a jumper wire between the threaded part of the plug and the cooling fins. You don’t have to bend up the electrode.
When you removed the plug was it wet (flooded)? If not wet and you have spark put about a teaspoon of fuel mix into carburetor throat, reinstall clean air filter. Turn on ignition and pull a couple of times. Did it try to run? Yes possibly fuel delivery problem Chech all fuel hoses and the filter on free end of hose in the tank. Fuel Line Replacement by SmallEng.com http://www.youtube.com/watch?v=JrXpU70Hmi0
The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
The pressure side of the primer returns displaced fuel to the tank as it is depressed.
Take lots of notes and a few digital photographs to help with reassembly.
Most chainsaw won't start problems with a good fuel delivery system are flooded. Start Procedure Cold:
Ignition on/off to on
Set compression release – optional step even if saw is equipped with a compression release
Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4)
Set compression release – optional step even if saw is equipped with a compression release
Push (open) choke pull starter until it starts. (usually first pull)
Warm:
Ignition on/off to on
Set compression release – optional step even if saw is equipped with a compression release
Pull (close) choke, set fast idle (done when choke closed on some saws) - Don’t pull with choke closed.
Push (open) choke, pull starter until it starts. (usually first pull)
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