I have a McCulloch Mac Cat 2.3ci (38cc) Anti-Vibration model 322569 / 322570 Chain saw & the Primer bulb busted on it. I purched another Primer Bulb & upon attempting installatin there are two (2) rubber tubes attached to the primmer bulb. After popping out the primer bulb I noticed that 1 of the tubes attached to the primer bulb goes to the carberator but the other one seems not to be attached to anythint. It's still attached to the bulb but the other end of it looks as if it was not plugged into anything after removing the top covering the carberator. It is just sitting there still attached to the bulb with the other end not attached to anything.
I think this is the tube that perhaps goes to the gas tank & serves to pump primer fluid (gasoline) up to the bulb & the other tube which is intact & goes to the carberator & the other outlet on the primer bulb serves to prime the carberator.
Upon throrough inspection I can not find where the other end of the second rubber tubbing connects inside the carberator housing. I have both rubber tubes attached to the 2 ends of the Primer Bulb with 1 attached to the carberator & have been unable to figure out where the other end of the rubber tubbing goes. Any help you can provide will be appreciated. Thank You.

Michael
mendesoto@sbcglobal.net

Michael Emerson, August 2008

Just replaced the tubing on my saw (same model). Of the two stems coming off the primer bulb, the longer stem connects to a tube that goes to the gas tank. On the back of the tank there are two holes. The top hole has a tube that runs directly to the carb (overflow back to tank). The bottom hole is for the tube that goes to the primer bulb. There are notches in the housing for these two tubes from the tank to fit in so they don't get pinched when you put the two halfs back together. Don't forget to put the fuel strainer on the end of the tube in the gas tank. It helps hold it at the bottom of the tank. Hope this helps.

Budd Droese, August 2009

The purpose of the primer is to pump fuel to the carb.for easy starting, so the end of the tube has to go into the fuel tank.

Twostroke Stephen, September 2008