1969 L-68 throttle linkage / return spring

[Douglas C.]

Hi all. Putting my carbs / linkage back on , and I marked most components, yes, dumb me.

Can someone show exactly how the linkage center bolt / nut attach?

Bolt on the inside of throttle shaft, then front rod, washer, rear rod, washer, nut? And also the return spring / bracket to rear carb stud / nut?

My AIM is not exactly clear and maybe it was not exactly correct to begin with even though it worked well.

Thank you.

Doug

[Jack C.]

Re: 1969 L-68 throttle linkage / return spring

Doug. Here is what I have:

Bolt thru throttle shaft with 1st nylon washer then very small nylon bushing/washer on bolt shaft which the throttle shaft rides on. Next 2nd flat nylon washer, rear rod, front rod then nut. At least this is how mine is set up. My carb spring goes from center carb to the first carb fuel feed line which is I think unoque to 68's.

[Wayne M.]

Re: 1969 L-68 throttle linkage / return spring

Here's a couple of thumbnails off my late '69 L68 set-up. Thanks to Jack, I now know I'm missing the small nylon bushing that rides in the throttle slot. I'm not sure about that thin brass washer next to the locking hex nut.

The P&A catalogs (poor as the artwork is) shows the rear carb rod next to the locking nut. Also, in Colvin's Chev-by-the-numbers, the engineering drawings of all tripower center carbs show front rod inboard/rear outboard, as is shown in my pics.

[Jack C.]

Re: 1969 L-68 throttle linkage / return spring

Nice pix. I think I'll switch the rods around on mine and maybe look for a small brass washer.

[Douglas C.]

Re: 1969 L-68 throttle linkage / return spring

Here's a couple of thumbnails off my late '69 L68 set-up. Thanks to Jack, I now know I'm missing the small nylon bushing that rides in the throttle slot. I'm not sure about that thin brass washer next to the locking hex nut.

The P&A catalogs (poor as the artwork is) shows the rear carb rod next to the locking nut. Also, in Colvin's Chev-by-the-numbers, the engineering drawings of all tripower center carbs show front rod inboard/rear outboard, as is shown in my pics.

Great pics. My setup has black nylon washers, and does have the clear plastic bushing in the throttle slot. I do not have a thin brass washer, maybe I can find one at a local hardware store.

Also, I wonder if there should be a thin nylon washer between the two rods?

Thanks again guys.

Doug

[Douglas C.]

Re: 1969 L-68 throttle linkage / return spring

Sorry, back again.

My return spring setup has a small bracket that looks like it goes on the rear carb rear stud, with a hole for thr spring to attach, but AIM does not show this.

Can someone show the correct throttle spring connection for an early 69 L68?

Thanks, Doug

[Jack C.]

Re: 1969 L-68 throttle linkage / return spring

This is for the orange secondary spring. Paragon has a pix I believe in their catalog or website

[Douglas C.]

Re: 1969 L-68 throttle linkage / return spring

This is for the orange secondary spring. Paragon has a pix I believe in their catalog or website

Yes, I have the single orange spring, is that correct to have just one spring?

And, the small bracket Paragon shows and the one I referred to that holds the orange spring, Paragon says it was used up to Nov. 68 build dates for 69's. My car was built in January 69.

[Jack C.]

Re: 1969 L-68 throttle linkage / return spring

You'll also need the primary from the center to the (I think) 1st carb fuel feed line. On my 68, it's on the 1st one.

[Douglas C.]

Re: 1969 L-68 throttle linkage / return spring

You'll also need the primary from the center to the (I think) 1st carb fuel feed line. On my 68, it's on the 1st one.

Thanks again Jack, maybe somebody with an early 69 Tri Power (Jan. 69 build) can post a pic. I'm just sorta stuck in between on what mine should be.

Doug

[John C.]

Re: 1969 L-68 throttle linkage / return spring

Doug

Only early 1968 cars used two springs on the tri-power cars. Late 1968 cars used the yellow spring only and 1969 cars used the orange spring only.

Check out this previous thread that discussed the 69 orange spring configuration:

https://www.forums.ncrs.org/showthre...098#post413098


John

[Chuck G.]

Re: 1969 L-68 throttle linkage / return spring

FWIW, here's a pic of my August 69 built L68.

Chuck

[Douglas C.]

Re: 1969 L-68 throttle linkage / return spring

FWIW, here's a pic of my August 69 built L68.

Chuck

Thanks Chuck & all. So, it looks like that return spring bracket lever that Paragon shows just does not belong. I will eliminate that, and my throttle cable bracket looks correct, with the N stamped on the center area. But, does the return spring just loop over that bracket or should there be a small hole in it to attach the spring.

I also assume the other end of the spring goes in the bottom of the center carb throttle lever, the small bottom tab with the hole in it. My carbs are dated originals.

Tks. again. Doug

[Jack C.]

Re: 1969 L-68 throttle linkage / return spring

Doug. There is a hole in the bracket.

[Douglas C.]

Re: 1969 L-68 throttle linkage / return spring

Doug. There is a hole in the bracket.

Hi Jack. I'll take a look tonight as I just don't recall seeing a hole. The bracket is old looking but maybe an after market one where I would have to drill a hole.

Doug