Received a donor Poulan P4018 due to No idle. 40CC, 18 inch bar.
Has a Zama W26B 63A carb.
Saw looks like not very many hours of use, chain and bar good, air filter still very clean.
I seen the primer lines and fuel line was hard and could tell that someone had been flogging the carb jets and they had removed a piece of plastic from the top cover for direct jet ADJUST access with the splined carb wrench. I ordered a $18 tuneup kit consisting of carb, fuel and primer lines, fuel filter, air filter, spark plug, primer bulb.
Installed all, added FRESH 50:1 NON corn gas, no start, would just flood. Discovered someone had connected the old fuel and primer line wrong. They had been connected wrong for long time because the lines were hardened in place. (indicating that the saw had been stored for long time after the lines were connected wrong)
Connected fuel and prime line per the Poulan Zama diagram, got a start and run. Runs good a High RPMS and will idle for awhile and just all at once die. Sometimes will idle for 15 to 20 secs then just die. Piss revs good, no bogging, L jet adjusts but saw will just all at once die at idle, Will re-start at fast idle on 1st or second pull if throttle is placed on fast idle with no choke and immediately accelerates good. Low speed jet very critical to get a idle and set a 1 turn out and same with the H jet. If H jet is turned out to 2 turns saw won't start. Old carb acts same as the new carb. Compression checks at 120, piston and cylinder looks ok. The carb manifold throttle boot fits snug and has a new carb base gasket of correct type. Muffler not clogged.
The main fuel line to the carb with the fuel filter is the smaller tygon line. (I mention this because I seen some members recommend using the larger tygon hose as the fuel delivery line to the carb) I do not have any replacement tygon lines of correct size in stock now to change the lines, but doubt that using larger delivery line would cure a idle issue on a Zama Poulan????
Can anyone tell me how to Vac/pressure test the crankcase on this 4018 Poulan. (like what is required to seal off the carb intake holes???) Do I need to remove the complete intake manifold to seal this area? Appears the seal is made into the crankshaft bearings)
Anyone have idle issue tips with these disposable type Poulans? (it's not heavy enough to use as a boat anchor, Yet)
Has a Zama W26B 63A carb.
Saw looks like not very many hours of use, chain and bar good, air filter still very clean.
I seen the primer lines and fuel line was hard and could tell that someone had been flogging the carb jets and they had removed a piece of plastic from the top cover for direct jet ADJUST access with the splined carb wrench. I ordered a $18 tuneup kit consisting of carb, fuel and primer lines, fuel filter, air filter, spark plug, primer bulb.
Installed all, added FRESH 50:1 NON corn gas, no start, would just flood. Discovered someone had connected the old fuel and primer line wrong. They had been connected wrong for long time because the lines were hardened in place. (indicating that the saw had been stored for long time after the lines were connected wrong)
Connected fuel and prime line per the Poulan Zama diagram, got a start and run. Runs good a High RPMS and will idle for awhile and just all at once die. Sometimes will idle for 15 to 20 secs then just die. Piss revs good, no bogging, L jet adjusts but saw will just all at once die at idle, Will re-start at fast idle on 1st or second pull if throttle is placed on fast idle with no choke and immediately accelerates good. Low speed jet very critical to get a idle and set a 1 turn out and same with the H jet. If H jet is turned out to 2 turns saw won't start. Old carb acts same as the new carb. Compression checks at 120, piston and cylinder looks ok. The carb manifold throttle boot fits snug and has a new carb base gasket of correct type. Muffler not clogged.
The main fuel line to the carb with the fuel filter is the smaller tygon line. (I mention this because I seen some members recommend using the larger tygon hose as the fuel delivery line to the carb) I do not have any replacement tygon lines of correct size in stock now to change the lines, but doubt that using larger delivery line would cure a idle issue on a Zama Poulan????
Can anyone tell me how to Vac/pressure test the crankcase on this 4018 Poulan. (like what is required to seal off the carb intake holes???) Do I need to remove the complete intake manifold to seal this area? Appears the seal is made into the crankshaft bearings)
Anyone have idle issue tips with these disposable type Poulans? (it's not heavy enough to use as a boat anchor, Yet)