Doors and Windows - Hinges on new door

The opening is from an interior laundry room to an exterior narrow lightwell (enclosed sides, exposed at top). The existing door has been completely removed and discarded. It had morticed hinges which were 3.5 x 1.5, with three screws holes each plate, six per hinge, the mortices begin 7" down from the top of the door frame and 11" up from the bottom.

The new door is thicker: 1.75". It is double pane glass on top half, wood on bottom. I have bought new hinges which are 4 x 1.75 and have four holes per each plate instead of three. The door frame has been adjusted to accomodate the new wider door.

I don't want to mortice the new hinge over the old hinge mortice due to possible screw hole conflicts.

The entire door length will be 74".

Can anyone suggest new mortice measurements from top and bottom for the new door or other suggestions. Thank you.

I'd mortise them in the same location. With the larger sized hinge, 4 holes instead of 3 (which will be in different locations than the old ones) I don't think you will have anything to worry about. If you don't have a vix bit, predrill your screw holes with a small drill bit so that your screws don't split the wood, they'll go right where you want them to. If you're worried about the wood not holding the screw, just use a longer one that will hit the stud. If you mortise in a different location, you'd have a pretty ugly mortise to hide.

OK, Thx I'll do that, the place where the hinges go IS a giant stud or post which constitues the door frame, its huge (House built in 1925) so hinges will anchor securely.

Prior to drilling your new holes, take a few golf tees, dip them in glue, and drive them into all the screw holes in your door and in your jamb. After they dry, trim them off with a razor knife. This will help keep your new drilled holes from conflicting with each other. Good luck with it.

What a great idea, will do. Thanks.