Hey everyone, I just picked up my first boat for $4000. It came with an 1985 Yamaha 90HP, model 90ETLK. I am really excited as I've heard this is a gutsy little engine. However, being it coming up on 40 years old I want to do some maintenance to ensure it continues to be reliable. One thing to note, I am in Southern Ontario, so to my understanding the motor has only ever been exposed to fresh water.
Here is the information I received when picking it up:
Here is the information I received when picking it up:
- The motor does run, the previous owner quickly fired it up for me when picking it up. However, it did stumble just a tad, the owner said he just hadn't set the choke and it would need to warm up for a bit.
- Someone previous to me looking at it had done a compression test, and reported getting 100 psi on all three cylinders. Now this could be false as it was just passed along to me.
- There is a line going to the hydraulic steering unit that is wrapped in an abundance of electrical tape. I did test the steering on land, and its smooth as butter. However, if the line needs replacement I would rather do that than have tape on it.
- Overall, the engine is very clean, I did notice quite a bit of grease on the underside of the motor near what looks to be the pivot for steering, I am hoping this is just from regular greasing.
- Replace water impeller and gaskets, possibly test for good flow (Not sure how to do this?)
- Test oil injection with premix and a graduated cylinder
- Change spark plugs
- Replace all cracked and rotted hoses