Just find a good inboard dealer and give them Rick Cohn's address for help if it's the dash computer.
Make sure to specify synthetic engine oil.
Welcome to the site, and before you go drop a couple hundies at the dealer, poke around the maintenance docs and threads. Scheduled maintenance in these babies are super easy to DIY, and the speedo issues are well covered in the forums.
How 'bout this: go spend $75 for Mobil1 oil and ATF and an impeller & $50 on an Oil Boy fluid sucker. With all the money you'll save in the not-too-long run, you can afford to spend a grand on Perfect Pass to fix the speedo problem FOREVER.
Simple enough for me to say (still don't have PP).