Originally Posted by MonoMicky
You may be able to tell by looking at the Hydraulic rod which tilts it. On the 2 speed engine, the rod is in 2 parts (telescopic) of seperate diameters and the speed changes when 1 rod is fully extended and it starts to extend the second rod of different diameter. If you only have a single diameter, non telescopic rod, then i would say it is operating correctly.
I havnt seen that on a trim n tilt. On a 135 & 150 that I had it was a single stage ram, and I assume the way it works, is that there will be a flow restriction to prevent the ram moving quickly on the lower part of its travel , when trimming up it reaches a certain part of the cylinder casing, at which point a second oil port comes into circulation allowing full oil flow, which effectively doubles the travel speed of the piston. The trim motor only runs at one speed all the time, so it has to be an oil flow restriction of some sort that controls the ram speed. Its a simple porting exercise, and there will be relief valve which recirculates oil when its operating on the slower cycle. I expect the 115 model simply doesnt have the porting in the cylinder to allow the speed increase, and if it does, and frankly I'm surprised it doesnt, then something may be stuck with the relief valve or a bit of seal may have blocked the port the controls the higher speed, I would however doubt that, as its a bi directional flow unit, ie up/down
That said, the above is only assumption, though, cos thats one bit of hyraulics I aint pulled apart yet