741 Carb Bowl Condition

[JTR249]

Thank you for the information on Greer's. I will get one there.
These parts arrived today, though still waiting on the bowl.
Any idea what the tools are? Some of them look like taps to work on carb threads or bearings. One has torque levers and hexagonal ends. The tool at top has a slender track engraved in it and a screw in the side to adjust the position of the rod extending from beneath.
-JR Linkert Carb Parts 1.JPG Linkert Carb Parts 2.JPG

[T. Cotten]

Thank you for the information on Greer's. I will get one there.
These parts arrived today, though still waiting on the bowl.
Any idea what the tools are? Some of them look like taps to work on carb threads or bearings. One has torque levers and hexagonal ends. The tool at top has a slender track engraved in it and a screw in the side to adjust the position of the rod extending from beneath.
-JR

Please delay your order, JR,..

Until you inspect your borewear; You do not want to spend your money twice.

The tools are priceless, but I can't identify any off the top of my head.

Your next pic is a nice pile o' parts; somebody should want the Schebler stuff, but you might as well file the gaskets for posterity.

...Cotten

[JTR249]

Here are a couple of photos. The circle engraved into the body looks very clean except for one place to the left in the first photo. The edge all the way in and at the bottom edge has a couple of places that are apparently chipped.
Is this what you meant?
-JR M741-1 Venturi End A.JPG M741-1 Venturi End B.JPG

[T. Cotten]

The other end, JR...

Where the throttledisc closes:

BOREWEAR.jpg
When the throttleshaft gets worn and sloppy, the disc can wear into the bore, making tuning increasingly difficult. When it reaches the idle bleeds (inset), tuning for the transition from the Idle to Power circuits becomes futile.

The simplest repair is to hone the bore only enough to eliminate the scar, and then fit an oversized disc and venturi.

....Cotten

[JTR249]

Okay, I can see what you mean now. I can't take a good photo of mine, though it looks very smooth and there is no wear at all. This looks like he re-coated the body.
The only chips are on the very outer bevel of this end. See lower photo. -JR
M741-1 Throttle End.JPG

[JTR249]

Here's a couple.
-JR M741-1 Throttle End Bore A.JPG M741-1 Throttle End Bore B.JPG

[T. Cotten]

" Re-coated the body.", JR?

Everything is hard to see, but is the venturi still installed? (It looks bigger than 3/4"!)

The manifold flange naturally needs a grind, and one bottom corner looks dinged some. It should probably be straightened first.

If there is truly minimal wear from the throttle disc, just installing fresh hardware should be adequate, after proper prep of course.

.....Cotten

[JTR249]

No, the venturi is not there yet. Ordered from Greer's as you mentioned.
My linear measurement of the bore is 1 and 2/16" diameter.
-JR

[T. Cotten]

It must be the light in #36, JR,...

(Or its the cataract surgery last Monday.)

Your body bore diameter is 1 3/16", as will be your throttledisc when measured at the shaft axis.

Hope its only a half-thou smaller.

....Cotten

[JTR249]

Hope your eyes recover as expected. My dad had to have that done once.
I found 5 10-32nd plugs in the parts lot above and installed them. Am I supposed to use locktite or anything on the threads?
-JR

[T. Cotten]

Hope your eyes recover as expected. My dad had to have that done once.
I found 5 10-32nd plugs in the parts lot above and installed them. Am I supposed to use locktite or anything on the threads?
-JR

Recovery remains to be seen, JR.

The gallery plugs are self-sealing "grub screws" and usually some of the last parts installed, after it is certain assembly is clean of all particulates that may be introduced...

There should be no reason for a plug to fall out, and quite few threadlockers withstand moden fuels.

Please note that all plug lengths should be similar, but Scheblers (left) have a taller 'crown' than Linkerts (right).

GALPLUGS.jpg

.....Cotten

[JTR249]

I was wondering about those. I will take them out again and compare them.
Is the sequence for assembly consistent with the manual or is there a generally accepted procedure?
1. Throttle Valve
2. Bowl and Float
3. Float to the Body
4. Choke Throttle and Venturi
5. Plugs and Adjustments

Does the sequence really matter if I am only doing this as a mock-up to learn assembly?
-JR

[T. Cotten]

The bowl is pretty much a separate assembly, JR,

Unless the float off-set allows it to rub the bowlstem.. (The bowl must be indexed with the valve beneath the Power needle, and all of it inverted so the valve can be tested by sucking upon it.)

Its pretty hard to install the venturi if shafts are in the way...

.....Cotten

[JTR249]

So when you say "indexed" you mean aligned. The holes in the venturi must be indexed/aligned to the holes in the body bore?
Yes, I understand it would be foolish to install some parts before the venturi.
I chose photo 5 as the bowl and only see the inside notch is almost gone. The finish looks like recent cad. Don't know.
What purpose does the bottom notch serve?
-JR

[T. Cotten]

Please index/align the bowl as such, JR:

Bowlposition2.jpg

Most iexts just say to put the valve beneath the needle.

The venturi only goes in one way, although I have seen one backwards.

I see no cad at all in your #5 post, and do not know what you refer to as 'bottom notch'..

....Cotten