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Im not sure what it was - seemed like crusted up dirt. The machine has been sitting for who knows how long before I bought it.
I agree.
That yellow looking material is sulfur compound starting to show can come from a condensation from in side a tank not kept full and fresh fuel, needs leaned up a trick I learned in the gas compression engines that iron oxide and sulfur is an engine killer in so many ways, clean up all the carbon with a soft small brush and scrap of carefully and clean the ring lands out with air put on a new gasket and torque carefully and check valve movement first and can wet check each valve with fuel dropped in around each in down position the compression test dry the with a few drops of oil will tell you if it’s the rings or valves ???? Ol Cat man/CTO SAII
A other way is if it’s running you can use a small hose and take a quart of trans (dextron) fluid and have the engine pull it through the carb from suction and the dextron will compress and clean out all the carbon very well, never use water or anything else it will destroy the piston and valves !!!!That yellow looking material is sulfur compound starting to show can come from a condensation from in side a tank not kept full and fresh fuel, needs leaned up a trick I learned in the gas compression engines that iron oxide and sulfur is an engine killer in so many ways, clean up all the carbon with a soft small brush and scrap of carefully and clean the ring lands out with air put on a new gasket and torque carefully and check valve movement first and can wet check each valve with fuel dropped in around each in down position the compression test dry the with a few drops of oil will tell you if it’s the rings or valves ???? Ol Cat man/CTO SAII
Will smoke like Casey Jones’s last train ride to hell and back and kills mosquitoes real good but does the job !!!!!
Mark: i’ve got a mid-90’s 6-hp Briggs&Stratton with a valve that occasionally sticks, I suspect carbon deposits.
The sea foam is not good ever tear down a carb with the residue in it carb cleaner will not remove it, the trans fluid helps clean it out the other way is to Intervenously inject chem-Tool into the carb while running and slowly and it really cleans out the carbon used it too on the small air compressors on the company trucks and gas compressors in the field some old 1197 6 cylinders we would run two qts through the intake to clean it up run valves and new plugs then changed the oil in each one ever 35 days on average !!!!!
That is a spring rpm clutch it engages as the engine speeds up like on a small go cart or minibike !!! It’s been welded up to use the pulley and probably had a spring kick in pulley to engage it when needed !!! That’s my guess !!!!
It’s to big for a chain saw !!!!
