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YS 1.40S throttle arm extension

Old 12-21-2007, 10:25 AM
  #1  
Iflyglow
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Default YS 1.40S throttle arm extension

Troy,
I have a bit of a problem with the throttle arm and engine mount. The throttle arm is directly in the way of the H9 aluminum mount. I had my Dad machine a alumium spacer to space the throttle arm out 3/8" and installed a longer socket headed cap screw. Wahla, the throttle will now be easily hooked up. The concern I have, is that vibration with the extended throttle arm shaft (3/8" longer than stock) will wear out the carburator body. Is this a concern I should worry about. The installation looks like it came from the factory. The set up extremely well on the bench. It is winter now here in WI.
Thanks,
Dave
Old 12-21-2007, 01:46 PM
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Troy Newman
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Default RE: YS 1.40S throttle arm extension

This is Ok you should not have a problem with it. If the extension gets too long and gets too heavy then yes it could have an affect down the road but it should not be an issue.

Another solution that I personally used one time. Nylon spacers from ACE hardware you can get them to match the plastic throttle arm almost exactly in OD. they have different lengths and you do just as you did with the aluminum. I'm sure the aluminum looks better, Just keep it light and use some blue locktight or maybe a little silicone RTV on the screw as a thread locker on the threads that go into the barrel and it will not come loose....you will be set.

Troy Newman
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Old 12-21-2007, 02:39 PM
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Iflyglow
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Default RE: YS 1.40S throttle arm extension

Troy,
It hardly weighs anything. It is machined out of 6061 t-6 aluminum, and was lightened in between the ends. It weighs a whole lot less than nylon spacers. The hole was also drilled to be a somewhat tight fit with the bolt. It sure is nice to have a Dad as a retired machinist. I had him also make a 1/4" and 1/2" if the need ever arises. He really enjoys makeing things for my models, since he has a lathe, mill and many other machines.
Dave
Old 12-21-2007, 08:14 PM
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Troy Newman
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Default RE: YS 1.40S throttle arm extension

Sounds great!


Yes it would be nice to have that knowledge. I'm about ignorant when it comes to really being a machinist. I know enough to do little things, this is if i don't screw up the tool in the process.

I'm a mechanical engineer and I wish I had spent more time in the machine shop learning how to do some stuff. There have been a few times I wished I had the knowledge, and experience.

Troy Newman
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