Background:
I bought an old Poulan s25da off of Craig'sList. Both the duckbill and air cleaner foam filter crumbled when I touched them. The fuel tank was empty with no signs of residue in the tank. The fuel line has hard/brittle/discolored. The bar oil reservoir was a 1/4 full of very dark, tar like bar oil. The saw has paint on all the screws and looks very lightly used. It was found in the attic of a local house in a box full of old newspapers from the mid to late 1970s.
Today:
Thanks to a big assist from Mark Myers providing me the service manual, I purchased and installed new 3/16" X 3/32" Tygon hose. When I removed the old hose from the fuel filter barb, I found the hose barb clogged with a putty-like substance. I suspect it was old residual fuel mix that hardened. I cleaned it out of the filter barb and ran/routed the new Tygon hose as directed. Then I filled the fuel tank with fresh 16:1 0E fuel.
The manual bar oiler was stuck/frozen due to old gummy bar oil. I drained the old bar oil from the oil reservoir and added about a teaspoon full of 16:1 I shook it around, let it set for twenty minutes, and drained it out. I filled the oil reservoir with detergent 10W30 motor oil and slowly pressed the manual oiler until I got a full stroke of the button and a good amount of oil deliverd to the bar.
Problem:
The saw won't pull fuel from the tank. Despite the missing duckbill, I know the tank is venting well because fuel will drip out of the fuel cap if you tip the saw. All hose connections are very tight. I had to use an electric heat gun to warm them up enough to get them to slip on. After several (12-15) pulls on the rope and seeing no fuel being drawn up the hose in the air box, I poured a small amount of fuel into the throat of the carb, set the choke to on, and pulled the rope. The saw fired off on the second pull and died. I did this three more times and got the same results.
Assumption:
I think the carburetor diaphragm pump is age hardened and I need a rebuild. What do you think and does anyone have a lead on a good place to acquire a new/rebuilt carb or just a carb rebuild kit for this old saw?
Thank you for your time,
Weedhopper
I bought an old Poulan s25da off of Craig'sList. Both the duckbill and air cleaner foam filter crumbled when I touched them. The fuel tank was empty with no signs of residue in the tank. The fuel line has hard/brittle/discolored. The bar oil reservoir was a 1/4 full of very dark, tar like bar oil. The saw has paint on all the screws and looks very lightly used. It was found in the attic of a local house in a box full of old newspapers from the mid to late 1970s.
Today:
Thanks to a big assist from Mark Myers providing me the service manual, I purchased and installed new 3/16" X 3/32" Tygon hose. When I removed the old hose from the fuel filter barb, I found the hose barb clogged with a putty-like substance. I suspect it was old residual fuel mix that hardened. I cleaned it out of the filter barb and ran/routed the new Tygon hose as directed. Then I filled the fuel tank with fresh 16:1 0E fuel.
The manual bar oiler was stuck/frozen due to old gummy bar oil. I drained the old bar oil from the oil reservoir and added about a teaspoon full of 16:1 I shook it around, let it set for twenty minutes, and drained it out. I filled the oil reservoir with detergent 10W30 motor oil and slowly pressed the manual oiler until I got a full stroke of the button and a good amount of oil deliverd to the bar.
Problem:
The saw won't pull fuel from the tank. Despite the missing duckbill, I know the tank is venting well because fuel will drip out of the fuel cap if you tip the saw. All hose connections are very tight. I had to use an electric heat gun to warm them up enough to get them to slip on. After several (12-15) pulls on the rope and seeing no fuel being drawn up the hose in the air box, I poured a small amount of fuel into the throat of the carb, set the choke to on, and pulled the rope. The saw fired off on the second pull and died. I did this three more times and got the same results.
Assumption:
I think the carburetor diaphragm pump is age hardened and I need a rebuild. What do you think and does anyone have a lead on a good place to acquire a new/rebuilt carb or just a carb rebuild kit for this old saw?
Thank you for your time,
Weedhopper
At least the K10-WAT is a commonly used kit; you just got a kit on hand for later use.
