Re: Problem with 1974 Mercury 402 Home › Forum › Ask A Member › Problem with 1974 Mercury 402 › Re: Problem with 1974 Mercury 402 donsmarineReplies: 26Topics: 0 June 6, 2018 at 11:04 am #77517 take starter out,put on hard surface,hold it down well,connect it directly to battery with jumper cables,+ positive clamped on,-negative touching quickly,on starter not battery,it should spin,good place to start.known as bench testing.