i'm looking at buying a 96 evinrude 40 tiller with a push button, not key, start (located back of the tiller arm). the current owner mentioned that it is hard starting on cold mornings and would have to remove the engine cover to choke it as it has no external choke lever. could it have some type of automatic choking system that is malfunctioning and if so, is this a common problem? any help appreciated.