PHP Warning: Use of undefined constant VBA_SCRIPT - assumed 'VBA_SCRIPT' (this will throw an Error in a future version of PHP) in ..../includes/functions_navigation.php(802) : eval()'d code on line 1 Mariner 70HP Mid 80s oil/fuel mix ???
Congrats on your new purchase you will have a ball I am sure. i cannot give any unique model info sorry only to run the motor on 50:1 TCW3. Yamalube is in my opinion the best mineral oil for the price (gotta be to keep a 2 stroke together for as long as Yamahas seem to last at 100:1 ratio).
If you want to go up in quality try the new full synthetic oils some of these state they can be run at 100:1 in old motors and confidently at 80:1 not sure which are imported in to aust ATM. Evinrude has a good synthetic also. nq