Tilt trim on Tohatsu 115 tldi

[Bowen Gord]

My entire tilt/trim unit got contaminated with salt water (no idea how). I am trying to rebuild it but cannot get the tilt cylinder open. I have the appropriate spanner wrench but the threads are seized. I don't want to apply heat as there are o-rings and seals - any suggestions? Both trim cylinders opened quite easily, but they have a lower torque setting. Also, any suggestions on how the unit could have been flooded with water in the first place? It seems like water got sucked right in - not just a little bit. The unit was not opened at all it happened while in the water but maybe gradually.
Thanks, Gord

 

[pvanv]

Is it the 115A or is it the 115A2? Regardless, there should be only one trim cylinder, and one tilt cylinder. If you don't see any leaks, I would just drain and purge the unit. Likely had a loose filler cap, or the motor got water in the reservoir tank.