Got the set of new bearings for the uper drive gears. It comes with the large and small spacers. I suppose this answers my question of throwing the spacers.<br /><br />Problem is the bearings don't look right.<br /><br />I got the 31-35988A 9 bearing set. It says 1.50 Heavy Duty ratio only. I have 1.50, are there two different 1.50 gears? The set consists of 2 different bearing part numbers. <br />1. One bearing is Timken P/N 386A, 382A, the other Timken 375, 371A. The numbers are the rollers and cups. <br />2. Main difference is the ID, the 386A is 1 7/8", the 375 is 2". The shaft end on the drive gear is straight, not stepped as shown in Merc parts illustration. The old bearings are both 386A's.<br />3. The new spacers are also thinner than the old, about half.<br /><br />Did I get the right bearing set? Should it be the 31-35988A12 instead?<br /><br /> 
