Hello,<br /><br />I have an old Mariner 20HP here and when i pulled off the lower unit to change impeller and gaskets, i found, that i can move the driveshaft pretty much when in gear, before the propeller starts moving. Has this to do with backlash? In the manual they write about 0,5-0,7mm when measuring backlash. I can turn the shaft much more. I can't believe that it is possible to put so much shimming material on the prop shaft to get the 0,5mm.<br /><br />Or is this normal and i misunderstood something here?<br />Lower unit oil is clean. No particles at all.<br /><br />thanks<br />martin