Hello all, I have been reading this forum for quite some time now. Unfortunately, I am now in need of your help. I pulled a bonehead move, and need help getting out of it!!
I was servicing my twin 2005 mercury 90hp 4-stroke outboard. I removed the lower units to replace the water pumps. When installing the lower unit back onto the starboard outboard, I believe that I was not completely lined up and damage something in the power head.
This was my first removal/reinstall of a lower unit. I thought I had the lower unit all lined up. I pushed it on as far as I could, until there was a gap of about ½” to ¾” left. Then I decided to install and tighten the bolts to pull it up the rest of the way. During the tightening, the bolts got tough to turn, and then I heard a loud “pop”. The bolts then were easy to turn the rest of the way. I thought perhaps it was a bit out of alignment, and the pop was it slipping into the position it needed to be in (the alignment pins I thought). But now I am pretty sure it was something breaking.
I remove the lower unit and inspected it for damage, but saw none. I reinstalled it a couple more times, and everything went together fine (still had to bolt it up to get it all the way on, but no more popping sounds). About 5 minutes of running the engine I seen oil in the upper cowling house and checked the dipstick to see there was no oil showing in the res tank
So, what could I have damaged? Where can I look to confirm the damage? Am I really screwed on this?? Any help would be greatly appreciated!!
Thanks for your help!!
Outboard info
Serial # 1B007911
Model # 1F90412DD
I was servicing my twin 2005 mercury 90hp 4-stroke outboard. I removed the lower units to replace the water pumps. When installing the lower unit back onto the starboard outboard, I believe that I was not completely lined up and damage something in the power head.
This was my first removal/reinstall of a lower unit. I thought I had the lower unit all lined up. I pushed it on as far as I could, until there was a gap of about ½” to ¾” left. Then I decided to install and tighten the bolts to pull it up the rest of the way. During the tightening, the bolts got tough to turn, and then I heard a loud “pop”. The bolts then were easy to turn the rest of the way. I thought perhaps it was a bit out of alignment, and the pop was it slipping into the position it needed to be in (the alignment pins I thought). But now I am pretty sure it was something breaking.
I remove the lower unit and inspected it for damage, but saw none. I reinstalled it a couple more times, and everything went together fine (still had to bolt it up to get it all the way on, but no more popping sounds). About 5 minutes of running the engine I seen oil in the upper cowling house and checked the dipstick to see there was no oil showing in the res tank
So, what could I have damaged? Where can I look to confirm the damage? Am I really screwed on this?? Any help would be greatly appreciated!!
Thanks for your help!!
Outboard info
Serial # 1B007911
Model # 1F90412DD