Re: 1956 Mark 25 ignition timing question Home › Forum › Ask A Member › 1956 Mark 25 ignition timing question › Re: 1956 Mark 25 ignition timing question dave-bernardUS Member - 1 Year (includes $3 online payment fee)Replies: 2014Topics: 30 April 9, 2018 at 8:55 pm #73701 On a 12ft aluminum boat it will be scary unless it has remote steering. be careful.