I have a set of carbs here that have L0433699 stamped on them. They are the same size as the SST-60 style carbs but they are off an early 90's 70hp if I remember right and have the adjustable needle valve close to the flange. I'm pretty sure these are jetted much smaller so If I'm running 73 main jets with the SST-60 style carbs, what would get me close for jet size on these ones? Also, what is the base adjustment for the needle valve? I'm guessing it's to fine adjust the idle mixture? I'm hoping someone has experience using these carbs. Thanks in advance,

Kevin