blowing up trim cylinders
 

I was talking to a guy the other day at the marina who says that he has blown up/split 3 trim cylinders over a couple year period on his boat. He has a slow cruiser type boat with twin TRII drives (not TRS, TRII). Boat top speed is 35 mph. He wants to know (so do I) how in the hell this is happening. He hasn't hit anything or done anything weird. Also where can he get reasonably priced cylinders? -Jeff :eek:

Re: blowing up trim cylinders
 

Do you know how much hydraulic force it would take to blow open a trim cylinder?
I don't really know for sure myself, but I'll bet the stock Merc pump doesn't put out that much pressure. You would think the hoses would give first.

Re: blowing up trim cylinders
 

Does he have water in the hydrulic fluid and maybe it freezes in the winter time and expands and cracks the cylinder.

Just a thought

Mark

Re: blowing up trim cylinders
 

geeze thats a good thought.... i read this and said " huh ?" because you are correct... lines would fail at 3500 psi and pumps only do 2000 or so locked soilid and relief is 1500 i think... no way on the planet they are blowing up thru the hydraulics.... but FREEZING and cracking them first.... thats just an inspired thought... great thinking....really... and ill bet youre exactly right.

Re: blowing up trim cylinders
 

I have seen a lot of parts freeze and break it doesn't take long :eek:

Mark