gas/oil mix for crystler 9.9hp

[larry dahl]

I just picked up a next to new 1971 crystler 9.9hp<br />outbord motor model #92HB s/n #3553. On the tank it has two charts one for 25 to 1 and 50 to 1<br />oil mix which should I use?

 

[rickdb1boat]

Re: gas/oil mix for crystler 9.9hp

50:1 Mixture is recommended for 1971 9.9 HP Chrysler.<br /><br />4.4, 5, 6, 6.6, 7, 8, 9.9, 10, 12.9, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 75, 85, 90,105, 120, 130, 135, 150 hp (1966-84) = 50:1