Years ago I put the larger one on an 85hp Evinrude that was without T/T. If I remember correctly, the motor will still manually tilt and you can use the pin to lock it in the up position while the CMC unit is all the way down (such as for transport). If the pump and cylinder do not interfere with the mounting, I would say you could leave them but if they are leaking, I would remove them. Hope this helps.