Anyone have a fix for handle with a slight wobble on a Martin mg-72 multiplier. Does anyone have a schematic for this reel. Is there a washer that goes underneath the handle on the shaft that the handle attaches to?

Have you carefully observed the reel to isolate the source of the wobble? Sometimes it may feel that way through the crank, but that could be imparted by, for instance, looseness of the frame screws, the gearplate not being fully latched to the frame, or the spindle being loose. Snugging everything with a good-fitting screwdriver might do it.

The screw that holds the crank is certainly most likely, but observe to rule out other sources. Lube with heavy oil might help, but regardless, remove the screw and crank and observe the looseness there. There is no rule says you can't add a strategically place washer where needed. A mylar washer (any hardware store, 25 cents.) in the right spot takes up play well and enables the crank screw to be tightened firmly.

The 72 is a rugged, rugged, design, but loosey-goosey is part of it. Don't expect it to feel like a casting reel. With it, or any fly reel, realize that it isn't designed to be used as a winch against extreme pressure. Fast recovery from the geared retrieve, yes, but still, pump the rod to gain line; wind the reel to spool line on the downstroke.

If the crank bearing in the gearplate is worn out, somebody probably neglected to lube it and winched in line often. But it was a lot of fun doing it, that's for sure.

Just grabbed two of mine, handle wobbles a bit on both of em. It's just the bushing a little loose, and I bet it had a bit of wobble new. If you are worried about, a small washer would improve the issue. There is no washer on the two I just looked at, and am pretty sure there was not one OE.

I picked up an MG72 a couple of years ago.The reel is old but the handle doesn't seem to wobble.It is a bit of a clanker but it just rips line in and has an excellent drag.

When I'm white bass fishing using a shooting basket, 70' casts with a sinking line, the fish will follow to your feet before picking up the fly.
The basket is important to keep the working sinking line in control and out of your feet.
When you hook up, the Martin multiplier (MM-11 double click-pawl is my favorite) will put the all the working line back on the spool in 3 seconds.

Both, I guess. Gotta say I didn't look too closely or remove the screw to try to rock just the shaft. Inside, the gears have freeplay as well. It was easy to see and feel the loose fit of the crank to the shaft. But anyhow, that's how these are made, not like a precision instrument with fine tolerances that are easily fouled by fine debris.

Whrlpool
Around here Mylar washers are impossible to find in hardware stores.