Re: Power tilt/trim
the pressures and surface areas are such that your pump has more work tilting than trimming most engines. Assumming that your engine is 125HP or smaller and that your trim cylinder is in good shape then the following is adequate.
mount assembly onto a securely braced 2x10. put a 36" piece of galvanized pipe through the swivel bracket. Tie a 80-90Lb weight onto end of pipe. run motor up using 12V battery (blue on positive) until weight is suspended in air. measure distance to floor with tape measure. come back next day and measure distance again. if distance is same then your system is good.
if you don't feel like doing that then a good pull-it-out-of-your-butt guesstimate would be 12-20 years. There is only one type of rubber made that is economically feasible and it isn't meant to last forever. Open filler plug and dump out some of the fluid. If it is red then anything over 15 years is running on borrowed time. If it is oil then anything over 20 has one foot in the grave.
