Question about Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

I have a Poulan 18" chainsaw. Dispite my best efforts to tighten the chain, it keeps slipping off of the bar. I can use it for about 30 seconds, then the chain slips off.

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  • dontbother10
    dontbother10 May 14, 2010

    Very good Mr D. Hold the nose of the bar elevated when adjusting and tightening the bar nuts. Is it a tool-less tension set-up? The failure rate of these is quite high. Lou

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  • Master
  • 4,088 Answers

Make sure the chain brake is off (pull it toward you), then remove the bar mounting nut(s)/bolt(s) and the remove the side cover, bar, and chain. Clean the oil passages in the rear of the bar including two small passages that run from the larger holes out to the chain groove on each side. Clean the entire chain groove and make sure the end sprocket turns freely and is well oiled. Clean the engine face where the bar fits, then start the engine. Oil should ooze out of a small port in the engine case. If ok, then lay out the chain so that it can be inspected for bent links, dry/sticking joints, or missing/badly worn drive teeth. Inspect the sprocket on the clutch outer drum component for wear or damaged teeth. Make sure the pitch of the chain teeth match those of the drive sprocket (is this a new chain?). Check the hub bearing of the clutch drum for obvious wear. If all looks good, fit the chain around the clutch sprocket, then slip the bar into the the engine mounting space and work the chain over the entire bar. When setting the outer cover, make sure the adjuster tang fits into the related bar hole, then attach the clamp nut(s)/bolt(s), run up finger tight. Use the adjuster to set the chain tension--it should just pull the lower part of the chain up to the bar plus a little more. Check that you can move the chain by hand without any binding, then tighten the clamp bolts/nuts firmly. Recheck that the chain is properly tensioned. If not, re-loosen the clamp fasteners and re-tension the chain. When the clamp fasteners are tight, the tension must be rechecked. Hope this long-winded response helps!

Posted on May 14, 2010

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1 Answer

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I would suggest adjusting the tension and cleaning and debris along the chain path (guide bar).

Here's the manual for Poulan PP4218AV =>

http://72.3.225.179/manuals/165555e.pdf

Look at page 6-7 for instructions to adjust the chain tension and page 16 for cleaning the guide bar.

Here's the link to other Poulan Products =>

http://www.poulanpro.com/poulanpro/manualSearchPrepare.do

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