You need to do a pressure test on the carb, this will tell you if the inlet needle is leaking, it is also important that the metering lever onto the needle is not set too high, on the metering side of the carb the gasket goes against the carb body first to act as a spacer to the metering diaphram.
SOURCE: Need to rebuild carburator on skilsaw chainsaw
On a different thread:
Oct 22, 2009 – your comment
Got it started by cleaning carburetor but it smokes quite a bit played with 2 screws on side going in all the way and backing out one and half turn still smokes
Oct 22, 2009 – my reply
Tune it until it idles and cuts properly. 1.5 CCW is a good starting point. Tune for performance. 1 turn CCW is as lean as I’d go. Clean air filter, fresh mix, fully warmed up, bar mounted and properly tensioned. HTH
Lou
SOURCE: Model 345 won't start. New
There is a vent in the tank, it is situated on the right hand side of the tank, close to where the fuel hose exits the tank, the early vent looks like a round white pellet, the later vent is a white plug with a nipple on the top, the later vent will just pull out with long nose pliers, the early vent has to be extracted useing a self tapping screw, this of course will destroy the vent.
SOURCE: have an old pioneer p38
You need to disassemble the carburetor and check the diaphragm. You need to blow nozzle of carburetor. If the fuel was left in him, now it has remaining traces of oil. You can try to start with a small pump to inject fuel directly into the intake of the air into the carburetor. Of course, the spark has to be here to start. Older chainsaws had a switch and a capacitor, which is very difficult to adjust. Newer chainsaws have electronic ignition, so it is easier for test. Most of carburator has three buttons to adjust. L (low), H (high) for fuel injection at low and high speeds. There is also a minimum (the chain must be stationary if it is well tuned). The chainsaw is set at low rpm throttle with screws ( L ), and its vivacity is set at high speeds ( H screw ). In the beginning is good put both to set at 1.5 turns from full closure. And then, if the chainsaw starts, you can adjust a carburetor work. Careful with adjusting with H due to high speed. Good luck!
SOURCE: When I stored my pioneer chain saw last year, I
GO TO YOUR LOCAL RURAL KING AND PURCHASE SOME ..."LUCAS GAS TREATMENT FOR CHAINSAWS"... TO CLEAN THE STALE GAS IN YOUR CHAINSAW.
HOPE THIS HELPS!
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