Question about Poulan Pro 42CC 2 Cycle Chainsaw, 18"
Go to: http://www.drystacked.com for a 12 page PDF document on Walbro carburetors. Pay special attention to the caution about the lower chamber gasket and the diaphragm. Crankshaft seals rarely become a problem until the crankshaft main bearings have worn so much that the crank shaft can be visibly moved sideways. Make sure the muffler and air cleaner are not plugged. A basic setting for H and L jet screws is turn both CW to stops (lightly), then back out CCW 1-1/2 turns each. The engine should start and run with these settings. Allow the engine to warm up, then open the throttle and adjust H CW until the engine starts to speed up but continue 4-stroking. Proper final adjustment is 4-stroking, but immediately 2-strokes when cutting. Let idle and adjust L CW until engine runs fairly well, but will allow the engine to 'follow the throttle'. Set idle speed screw so that the chain stops turning, but the engine continues to run. Hope this helps.
Posted on May 10, 2010
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Posted on Jan 02, 2017
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