I would do as Ace suggests first.....disconnect the e-unit and test it to make sure it cycles. But I've worked on 3 of these sliding shoes engines for some friends over the last couple of months. All with the same issue.....the shoes losing contact. With two of them, bending the shoes improved their performance, but with one of them, we may tether the engine to it's tender to make use of the tender's rollers.
Roger
