Outboard Lower Unit Tear Down: Seals and Prop Shaft Repair Yamaha F90 

All Good and thanks for watching!

Thanks for checking us out!

We do all of our design and concept/prototype in house. Nearly all of our assembly and prep is completed and inspected in house. About 80% of our steel tools are machined in the United States with the remaining 20% coming from our machinists outside the States.

FYI, motor is a Yamaha 2005 90 2stroke

The lower housing on the 90 can be a challenge. can you send any available photos to tyler@outboardst.com. I want to see what the remnants look like.

@@outboardst.comoutboardspec8631 Thanks Tyler, I anticipate picking the lower unit up from the shop this week and will send photos. Appreciate the help

Oh for sure there are many tools for the retainers, and I have to use a retainer wrench to reinstall the new retainer during re-assembly. The reason I usually always drill the retainers out is that once the salt water builds up some corrosion on the bottom/skeg side of the retaining ring, it will often deform the ring out of round to the point that most retaining ring tools won't even fit the ring and the scale deposit itself isnt going away peacefully. We go into some detail on this at the 3:18 mark. If the retaining ring goes out of round with a wedge of scale between the inner bore of the casing and the outer threads of the ring, it only comes out one way: in pieces.