How to get gunk and varnish out of a chainsaw [SOLVED]

I have an old Husqvarna 51 chainsaw that has been sitting for years. It has never been serviced and it still has the same old gas in it. I’m wondering where I start to get it into working order. I thought I would start with the guys that get the gunk and varnish out of the fuel system. Can you give me some direction? Thanks!

Notify of

1 Comment
Newest Most Voted
Inline Feedbacks
View all comments
Jim D.
4 years ago

Great question Marty. What I would do: First, pour out the old gas in the chainsaw’s fuel tank. Next, add a mix of 1 part Sea Foam to 2 parts fresh gasoline to the chainsaw tank – figure 10 or so ounces total. Then remove the spark plug and pull the start rope 10 or so times to draw the mixture into the carburetor circuits. Let the chainsaw sit and soak for 2 or 3 days to work on any old fuel varnish that likely formed in the carburetor passageways. When ready to run, put the plug back and start it up. It should stumble, smoke, and idle rough for a minute or so before it smoothes out. Add more fresh fuel when ready to use the chainsaw. Hope this helps!