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Throttle return spring question

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Old Mar 5, 2013 | 12:37 AM
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Default Throttle return spring question

I have a 65 Vette 300 hp with the correct Carter afb. I'm trying to find out where does the throttle return spring attach to at the carb. I don't see a separate hole for the spring on the throttle arm? Does it just go over the linkage? Anyone have a pic of it. Thanks
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Old Mar 5, 2013 | 01:52 AM
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The large curved end of the spring goes through the small hole drilled in the part of the throttle linkage that goes through the lever on the side of the carb. There's also a washer between the spring and the bushing that goes in the lever hole where it pivots. It looks like a hole for a cotter pin, but that's where the spring goes.

If that's not clear, I can get a picture tomorrow.
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Old Mar 5, 2013 | 09:57 AM
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Yes, a picture would help

Thanks
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Old Mar 5, 2013 | 11:26 AM
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Here's a picture. I'm running two springs, so it distorts the bushing a little. I should probably add a washer.



Last edited by 65GGvert; Mar 5, 2013 at 11:41 AM.
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Old Mar 5, 2013 | 11:46 AM
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You could always hook the second spring to the lower arm shown in that photo, and run it toward the back of the engine. It's easy to make up a bracket to hook it to,
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Old Mar 5, 2013 | 01:59 PM
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Originally Posted by LB66383
You could always hook the second spring to the lower arm shown in that photo, and run it toward the back of the engine. It's easy to make up a bracket to hook it to,
It's designed with the spring going to the front for a reason; if you run a spring to the rear, it accelerates wear on the throttle shaft and its hole in the baseplate.
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Old Mar 5, 2013 | 03:09 PM
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Default 1965

by the looks of the throttle linkage distourtion i would say sping tention is a big factor . try taking off one spring and let it relax .
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Old Mar 5, 2013 | 04:30 PM
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Originally Posted by rick charles
by the looks of the throttle linkage distourtion i would say sping tention is a big factor . try taking off one spring and let it relax .
I'm not having a problem, I posted the picture to show the OP where the spring attached. Whether one spring or two, the rod pulls as shown. The additional spring is as a safety and does not add much tension in the relaxed position shown in the picture. I need to add a washer to the inside between the bushing and the spring end, just haven't done it yet.
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Old Mar 5, 2013 | 07:43 PM
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Originally Posted by JohnZ
It's designed with the spring going to the front for a reason; if you run a spring to the rear, it accelerates wear on the throttle shaft and its hole in the baseplate.


Running them to the rear, as is factory on many engines, causes premature wear of the throttle body and throttle shaft. This is one of the common repairs I have done in the past for forum members.
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Old Mar 5, 2013 | 08:26 PM
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Thanks for the picture. I'll go hook it up the correct way now.
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Old Mar 6, 2013 | 12:02 AM
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You should ALWAYS run two throttle return springs. Just one spring isn't safe.
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