Mariner 115hp lower unit removeal

[Chris1956]

Re: Mariner 115hp lower unit removeal

Well, I think the mystery may be partially solved. If the prop won't come off, the motor has been in salt water for a while. Try a 2X4 and pry the prop away from the gearcase gently, alternating between prop blades. I recommend you tilt it up and soak the propshaft splines with some penetrating oil.

Pulling the powerhead will not help IMHO. I doubt you will budge it with the gearcase still attached. Use some wood wedges to get some separation between gearcase and midsection, hang the mother upside down, with the powerhead 1 inch off the ground, and spray the crap out of the driveshaft with penetrating oil. The goal is for the oil to drip into the crank/driveshaft connection and loosen it.

 

[Rickyroo]

Re: Mariner 115hp lower unit removeal

I was able to get the prop off however it had some kind of sticky stuff on it. I was able to clean it off but I had to scrap it off. I think who ever worked on this motor before my may have used the same stuff on the drive shaft as well and that is why it will not come apart. I was only able to get the prop off after using some heat and brute force.

 

[racerone]

Re: Mariner 115hp lower unit removeal

No , the drive shaft splines are usually greased.-------But folks still assemble these dry and without the o-ring seal in place.----That is why you now need an atomic bomb to get it apart.

 

[Chris1956]

Re: Mariner 115hp lower unit removeal

The stuff on the propshaft may have been Perfect Seal. That is recommended by Merc. Merc doesn't recommend it for the driveshaft though.

 

[Rickyroo]

Re: Mariner 115hp lower unit removeal

I guess I will just keep prying on it and using heat until I get it all pulled apart. I just hope I don't damage anything that can not be repaired.