Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 427Get this manual
LEFT HAND NON-RATCHETING
8After driveshaft is removed from gear case, remove and retain shim(s) that were located under upper tapered driveshaft bearing9If inspection determines that replacement of driveshaft tapered bearing is required, remove bearing from driveshaft as follows: aPosition driveshaft in vise; DO NOT tighten vise jaws against shaftbStrike shaft with lead hammer; take care not to drop shaft
10Remove 18 loose needles from outer race of driveshaft needle bearing11If inspection of driveshaft needle bearing surface determines that replacement of needle bearing is required, the 18 loose needle bearings previously removed must be reinstalled in bearing race to provide surface for mandrel to drive against