There is actually an external plud/connection-found that. I replaced the interlock switch (very simple) but I still have the same problem: engine turns over but won't start. The starter motor itself is working. I am assuming the bendix at this point? As always, thanks in advance.
If the engine turns over but won't start, your possible problems could be fuel delivery, timing, or lack of spark. Is the spark plug indicating that it has any fuel on it after you turn the engine over for about 10 seconds? Have you tried squirting a little gas into the carb while you crank it over? Let us know if either of the things make a change for you.