I only used my GP 2-4gpm injector a handful of times. I noticed it was rattling when I took it off my 4/4 machine, sure enough the little delicate spring inside was broken in half.
I now have a 5.5/3500 and hope the GP 3-5 included with the machine will pull like this one did. I’m just shocked this thing quit so soon, is this normal? Yes…I rinsed it after every job.