I have just replaced the Model NH carburetor on my 1925 Depot Hatch. I now find that the carburetor throttle rod is about ½ inch too long. There is always a right way and a wrong way to shorten this rod. At 87 I don’t have the go-ahead that I used too and can’t seem to think beyond my nose.
I know that the timer rod is charged by bending or straightening. But I don’t see much chance of doing that with the throttle rod without getting it all out of kilter. Any suggestions?
Right now I have a second one on ordered and will play with it.
It seems to me that it would be best to rebend the steering column end.
I usually do it this way:
Clamp the rod in your vise, between two pieces of scrap wood, with the point at which you want the bend to begin, just peeking out from between the wood.
Heat the end with your Propane or MAPP torch until it's cherry red.
Bend it with pliers. At the same time, straighten out the old bend as best you can.
You may need to tap the bend a bit to make it bend with the radius you want.
When it cools, and you've dunked it in water to make sure it's cool, check the bend's position and re-do the above if you need to.
Then drill the cotter pin hole, and cut off the excess. I use a file or belt sander to smooth the end and make it safe.
You might be able to kink it or put an "S" bend in it to eat up the length a bit at the clear area shown in the photo without trying for a 90 deg. bend but use heat in any case.
There are two different length throttle rods. Depending on the year of your NH, earlier carbs. had a longer throttle arm - later ones had shorter arms - could be the issue.
I used Charlie's suggestion, and gave it a few "S" bends on both side of the engine. I did not use any heat just a few big pliers.