OK, my Universal M35B idles fast. It should be 800-1000 RPM and it is at 1270 (verified with strobe and matches tachometer, more or less).
Not a problem. I break out the technical manual and locate the idle adjustment screw:
From the text and the drawing, does it not seem like the circled screw should be the idle adjustment screw?
I thought so.
So, I loosened the screw. No effect. I tightened. No effect.
Finally, I stuck my camera in there so I could get a better look. Definitely not the idle adjustment.
The arrow points to another adjustment screw that is not at all brought to one's attention in the drawing (though it is present). The throttle arm actually rests on that screw making it suspiciously like an idle adjustment screw.
Super! Now all I needed to do is loosen the locknut and slip a screwdriver in there. Well, happily some previous owner had already loosened that nut and left it spinning freely. That was good because I have no idea how I could get a wrench in there. Bare in mind, this picture makes it look pretty accessible, but I cannot see any of this. There is just enough room to slip my arm in there and move around a little bit.
And, although I can kind of feel the slot on the end of the screw, there is no way to get a screwdriver in there. With some contortions, I managed to put a screwdriver bit into a tiny socket wrench and get it in there. One of the sides of the screw slot promptly fell off, leaving me with this:
... a corroded stump and no way to remove it that I have figured out, yet.
Removing the throttle arm helps a little bit, but not enough. I tried to get a pair of vice grips in there to grab and turn it, but there just isn't enough room.
There must be some magic tool that will let me grab onto that screw in that confined space.
Not a problem. I break out the technical manual and locate the idle adjustment screw:
From the text and the drawing, does it not seem like the circled screw should be the idle adjustment screw?
I thought so.
So, I loosened the screw. No effect. I tightened. No effect.
Finally, I stuck my camera in there so I could get a better look. Definitely not the idle adjustment.
The arrow points to another adjustment screw that is not at all brought to one's attention in the drawing (though it is present). The throttle arm actually rests on that screw making it suspiciously like an idle adjustment screw.
Super! Now all I needed to do is loosen the locknut and slip a screwdriver in there. Well, happily some previous owner had already loosened that nut and left it spinning freely. That was good because I have no idea how I could get a wrench in there. Bare in mind, this picture makes it look pretty accessible, but I cannot see any of this. There is just enough room to slip my arm in there and move around a little bit.
And, although I can kind of feel the slot on the end of the screw, there is no way to get a screwdriver in there. With some contortions, I managed to put a screwdriver bit into a tiny socket wrench and get it in there. One of the sides of the screw slot promptly fell off, leaving me with this:
... a corroded stump and no way to remove it that I have figured out, yet.
Removing the throttle arm helps a little bit, but not enough. I tried to get a pair of vice grips in there to grab and turn it, but there just isn't enough room.
There must be some magic tool that will let me grab onto that screw in that confined space.
