Changing seals in a 9.9 yamaha lower

[flyingfrizzle]

I just got a 1989 FT9.9EXF (9.9 four stroke Yamaha 25" kicker) and would like to know if anybody has changed the seals on the lower unit before up here. They look to be the same part number and the same type of seals as most of all the 9.9's from 84 to in the 90's or latter also same on the 2 bangers as well. I haven't pulled the prop yet but just curious what im up against?

[abl1111]

I was in the market to do this with a 1992 9.9 that someone gave me. I pulled the lower unit and jury rigged a freshwater feed to make sure the motor ran well. Once I pulled the lower unit off, I realized how bad the corrosion was around the impeller pump housing and underneath - and how bad the wear was on the shaft, bearings etc - so I found a perfect one on eBay - for $125. Runs like a top. All the parts to replace my existing lower unit was ridiculous.

If all comes apart easily, it's not a bad job, but I guarantee you that you will run into a problem with at least one bolt or the bearing will be next t o impossible to get out and then it's a PITA…

One trick I did learn was to put a torch on trouble nuts/bolts, or corroded pressed in parts - heat it HOT !!! then douse in cold water. It breaks the corrosion a bit. Take your time.

I have the motor but no boat to put it on. I have a line a 14' LUND just don't know if the 'lil 9.9 will push her well enough...

Good luck.

[flyingfrizzle]

After looking it over better once I got it home I realized it was engine oil not lu gear oil. When the owner brought it to me it sat in his truck at my work all day on its side and when I loaded it up that evening I saw the oil coming out from around the prop and assumed it was from the lu and that a seal was bad. Turns out it was just where the oil ran out of the exhaust from being laid over on its side. The oil made its way down the mid section then came out around the prop. Cleaned it up well and stood it up in a barrel of water checked the fluids and the crank case was over filled a little bit so I drained it to the full mark. Hooked up a battery and she fired right up after sitting for 3 years. Ran like a top only thing is it needs a new water impeller due to a weak stream to hardly no stream out the tail tail. Didn't run it long but will change the impeller and the only other issue was the shift cable was loose under the cable connector. She will be a nice backup for the 25' if I go with a single. Just need to find a way to mount/carry it up in the cabin so it keeps the weight forward instead of on the back of the transom.