Some of you may be familiar with the old adage of classic trucks, where you don't clean the caked on grease/oil because that is what's plugging the leaks, right? Well, case in point I think...I put some WD-40 on some of the hinge components of my 8N, including the throttle lever. It operates much smoother against the quadrant plate now, but I think I made it too loose... When I move the throttle lever up to about 1/2-3/4 range, the engine will rev up, but when I let go of the lever, it 'snaps' back down to idle; doesn't hold at desired throttle position. Is my quadrant plate too worn out to hold the lever, or did I fix it "too good" with the lubrication?

I 'farmerized' mine with a spot of arc weld on each bump.

If the tension spring is missing in the throttle linkage the throttle lever will not hold position.

Travis, here is what a worn throttle plate looks like next to a new one:

How does yours look in comparison?

Mine definitely looks like the worn one; hopefully these picture links work. The throttle lever used to stick, was pretty stiff, and after the WD, it’s super slick now and doesn’t hold, as mentioned.

The first thing I would do, assuming you don't want to replace the plate, is remove the lubrication from it and see if that helps. If not, follow the throttle rod down behind the air cleaner (may need to remove the air cleaner to get to it) and you will see that it is held by a pinch bolt that connects it to the carb linkage. You can loosen that pinch bolt and see if you can push the throttle rod down a little more to provide more friction against the throttle plate.

Good luck with it.........Ed

Just a follow up; I replaced the quadrant and the steel ball in the lever (didn't even know that was a thing hahaha), and now the throttle is working great. Need to replace the governor, but that's a different story. :) Thanks for the help!

Thanks for the follow up, Travis. It's always helpful to others who may have the same issue.