Re: Is it normal for the drive shaft to move in an out by half an inch??
What engine? Can you post a picture? Not too sure what you mean by 'Driveshaft'... if you're talking about the crankshaft then no, definitely not normal- if even possible...
Or are you driving an alternator with the propshaft?? unusual but I suppose it's possible but rpms would be rather low.... Even so that shouldn't move in and out either..
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"