It's not hard to replace and rebuild yourself and you can save a lot of money doing so.
Check out Marine Tech Tools for the proper tools and instruction to do the job yourself.
https://marinetechtools.com/https://marinetechtools.com/professional-marine-tools/trim-tilt-wrenches/yamaha.html https://youtu.be/nfPyXNQQOf4To make it easy to fill the cylinder with hydraulic fluid, get you a squeeze bottle like these and it make it super easy.
7-pack Plastic Condiment Squeeze Bottles - 16 Ounce with Red Tip Cap
https://www.amazon.com/7-pack-Plastic-Squeeze-Condiment-Bottles/dp/B01HAWNA5M/ref=sr_1_1_sspa?crid=3H35SV83WAQ2F&dchild=1&keywords=squeeze+bottles&qid=1595952403&sprefix=squeeze+%2Caps%2C248&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFYTTZYNEdMWkxWMzUmZW5jcnlwdGVkSWQ9QTAxNTY5NzVaMkk1TE5BWVc1UjgmZW5jcnlwdGVkQWRJZD1BMDM3MjgzNE82RFpTVERYREYwVyZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=