hi, any one please help me with this.I have a 1973 mercury 85hp outboard on my siera cuddy cabin hard top,i had all the wire,cable,gas pump ,i mean every thing all good,i also do tune-up too.but when i try to start the engine in the morning it wont start,i keep turn key about 10 to 15 time still dont start,then i just leave it about 2 hours,come back try to start,it right on.then this happen same thing,if i leave it couple day.i dont why ,it most be some not right about the gas or some thing.can any ony have any idea about this.thankyou.