150 Merc heating up

[wellcraftinmass]

I have a 1989 Merc 150 that heats up after about 5 minutes running. I pulled the lower unit and found the past owner had installed a new pump and liner, as he stated he did. The pump tube guide went back in place like it was supposed to when I put it back together. Any ideas why its still getting hot and buzzing??

2nd problemis the tilt/ tim system shot the bed this week, anyone have one for sale? 3 ram, side fill. LMK and thanks