Craftsman 919.177541 bogs down and stalls
by Jr. Gunn
(Ionia Michigan )
Craftsman 919.177541 air compressor
Hi, I purchased an older model Craftsman compressor today. 4hp, two cylinder, 220v power.
With good,clean, power to the unit it will run flawlessly up to about 40 psi, where it slows, then stalls.
At this point, I can turn the flywheel by hand easily. If I turn it off, it remains sealed and holds the 40 psi.
Now, if I stick my finger over the intake valve, either one, it will merrily run on up to 110 psi.
So, is this an indication of a bad gasket, or bad valves?