Pull the side cover and check for a broken or misaligned chain tensioner. I assume that you have loosened the bar nut on the side cover before attempting to adjust the chain tension. The methiod varies depending on whether your model has the side chain tensioner or the quick chain tensioner.
SOURCE: I need an owners manual for a Stihl MS180 Chain
Hello Dave;
An OM for your saw can be found at this link:
http://www.stihlusa.com/stihl_ownersmanuals/MS170_180_Manual.pdf
If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.
SOURCE: where do I find a operating manual for my STIHL
Don't believe everything you read. Stihl Product Instruction Manuals http://www.stihlusa.com/information/info_product2.html If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck. Lou Thank You for using FixYa.
Your OM can be found here:
This was returned from my attempt:
http://www.stihlusa.com/stihl_ownersmanuals/MS210230250_Manual.pdf
IPLs (parts lists) are proprietary and not available to anyone not a Stihl dealer.
SOURCE: Tension screw won't tighten the chain on a Stihl MS660
remove the cover and look to see if the tab is broken off
SOURCE: air gap and spark plug gap 025stihl chain saw
the air gap is about a business card thick and the plug gap is .020. Stihl has a special tool to measure exact air gaps so the business card is close
If you need further help, I’m available over the phone at https://www.6ya.com/expert/kelly_69a0cf1b13789df1
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