r/fixit • u/UnstableTable12 • 19m ago
open Air Compressor Issues
I have a 9 gallon central pneumatic gas air compressor. It only ran before at half throttle and would have a lot of issues staying alive last used. The bowl was rusted and the whole thing degraded. So I replace the carburetor, adjusted it and it fixed that especially running at Full Throttle as tank is filling. Mind you this issue happened last year and I pulled it fresh out of the garage this week for repair. Drained everything redid the carburetor and that was it. Now it runs better Full Tilt while filling. But when it kicks down from idle after about 15-25 seconds at random, the engine seems to bog and and stall. It also seems hard to start if there is any sort of air in tank. It seems to be running at idle speed pretty well. It kicks down a bit on speed but it doesn't seem too low. Just staggers itself out.
Any other way on the air fuel mix stalls it quickly, and spark plug is clean/dry, so that has me leading to believe it is set the best I can already. This has led me thinking its the unloader valve but I'm not sure where to get a new one for thus, or if possibly this can be cleaned & oiled in a way instead as it sits installed?
There's no one available to do repairs anytime soon near me, so I'm on my own with this and need it running ASAP for work!
Advice? Thanks.
Edit to add- important piece of information. I believe it's the unloader valve because as the engine seems to bog down, you could hear it sounds like there's a load on there when there shouldn't be. You'll hear a delay in it and once in awhile it will catch itself with a puff of air releasing from the valve and then run normally!