I took my boat out for a post winter shakedown on Saturday and had a issue with the trim. At power settings above 2500 the trim will creep down. Anything above 3500 and it barely trims up..I checked my trim cylinders and the left one is very weak. Moves much slower than the right side and I can put enough force by hand both ways to stop it. It doesn't leak externally but it's probably leaking inside. I ordered the seal kit today, but need the spanner wrench to get it apart. Any ideas on what size it is and where to get it? No luck in the loaner tools at Autozone or Advance Auto here. That was a long shot. Thanx for your responses