I have a straight blade. She lifts and Lowers fine. Goes right without any issue. When i try to angle left, she goes right first, all the way then swings left. When she reaches all the way left, she goes right again. Sometimes she'll just keep swinging back and forth. Sometimes she stops When she's all the way left. But anytime the left control is first applied it goes right first. Is this the poppet check valve needing replacing ?