Good evening all.. I am new to boating and recently purchased a 1974 16' mirrocraft with a 89 Johnson 20hp outboard, long story short I got the shaft. anyways I dropped the lower unit to check the water pump and sure as chit its melted into the housing. my immediate question is should I be able to move the shift-link up and down in the lower unit and when I put the driveshaft in, it doesn't seem to engage, when I spin it the prop shaft doesn't move and I can't seem to be able to move the shift link up or down to engage the gear. any help will be greatly appreciated, thank you