have an '85 omc 5.0l, just replaced heads,exhaust manifolds, intake manifold, and new edelbrock 4bbl. Took it out for test run and engine sounds and runs great; idles @600 and top speed @40mph @4100rpm; except i am having a problem when shifting to reverse. Engine rpms drop to @200 and gear does not engage; if i move it to neutral and back to reverse eventually gear goes in.Does it have to do with the shift interrupter? If so how do i test or adjust it.
