so i have a 25hp yamaha 4 stroke tiller on my lund going to canada last year i hit a rock going close to full speed took it out to see the damage i cracked the housing an theres a chunk the size of a softball missing theres nothing leaking and i actually still runs once i get close to half throttle it starts making some noises my question is could the housing and shaft be replaced an use the old parts or am i better off just getting a brand new lower unit since i cant find a used one also since the covid-19 going on i cant fix it till things quiet down more if i were to run the motor an just putt along on my favirote lakes to fish till i get it fixed would running it hurt the motor more or should i just park it till i can fix it