2 words for this. Long forceps.
I have straight and curved set.
Plus flashlight and lots of patience. Only could find straight forceps. Will pickup a curved set next time I visit Harbor Freight. Also helps to remove plastic plug and screw behind it on chain side of saw. Gives one a tiny bit more room to see the impulse hose. Saw is now running. Rebuilt carb, changed fuel line, tank filter and impulse hose. Final observations, carb filter was plugged, and for a 18 year old saw impulse hose was in good condition, somewhat soft with no breaks and fuel line also was in decent shape. Thanks for your help.