MerCruiser Alpha One 1 Lower Unit Gear Set Forward Reverse Bearing Carrier 70-77

Item Details

• MerCruiser Sterndrive Alpha One Lower Unit Complete Gearset That was generally found in 1970-1977 models (Pinion, Forward, Reverse) & Bearing Carrier
  • Used in MerCruiser MC-1, #1, "R Drive" lower units 1970-1977 but also could be used as a complete set in 1978-1982 units if you use all of the gears here.
  • (If your driveshaft HAS A PRELOAD PIN then these are the correct parts, if your's does NOT have a preload pin, then these are NOT the correct gears)
    • The time period 1970-1982 should be the time period that covers when the drives still had the preload pin, but the easiest way to identify what type of gears is whether or not there is a preload pin, and by physically looking at the gears you can see they have a different rotation.
    • Gearcase Must have Preload pin and Serial Number 3469428 & Up
  • Pinion Gear: 43-61027
    
  • Forward Gear: 43-61025 / 43-92158A1?
  • Reverse Gear: 43-61026 / 43-61026T
  • Bearing Carrier Assembly: 73020A14 (73020-C)
  • Again the 1978-1982 Gears were slightly different than this, and although the set can be used at any point during the 1970-1982 time period, you have to install them as a complete set and NOT mix & match gears from a different set (I.E. 43-92319 / 43-99381 / 43-92320)
• Used but in great shape! 
• This unit should be good to go, but you will need to please inspect all the ball bearing to your liking before installation. It may need to be replaced and these can be obtained rather affordably easily if needed. This listing is primarily focused toward the gears & bearing carier themselves, but if you feel the bearings are acceptable (which it migh very well be) then that is just a bonus. You should replace the seals as that is simple maintenance if you are doing this replacement.
  • Basically what I am trying to say is that this listing is for the Gears & Bearring Carrier, I could have taken the bearings off, but I felt that they are still usable and you should be able to put drop these parts in and go. But, if you feel the bearings should be replaced, please replace them.
    
    
• Application
  • For 888 drives s/n 3784375 and up
  • For #1 drives s/n 3469428 and up Except, MR/ALPHA Units which have no pre-load pin in the top of the drive shaft. (If your unsure what this means, just ask)
  • They used the same lower gearcase with all of the engines 1977-1982 so you're particular engine is not applicable so this basically covers most (120hp 140hp 4cyl 165hp 6cyl 170hp 305 350 470 2.5L 3.0L 4.1L 3.7L 5.0L 5.7L V8 etc...
• Freshwater Used Part!
• Purchase with confidence!