Have sears model 42cc twc chain saw 18" and need to get throttle assembly back together in unit. How do I do it

SOURCE: chain sprocket

I looked at a breakdown for the 42CC not sure if the same one or not but it appears that the chain sprocket is held on by an Eclip and behind that a flat washer. If this doesn't look like yours give me the model number and I will research another breakdown

SOURCE: Chainsaw pull cord wont tension up

Its almost certainly made by Poulan.
This may help you find an IPL at Sears, they are available:
http://www.searspartsdirect.com/partsdirect/modelHelp.pd?modelNumberId=29
This lists all Poulans. It will be difficult to find your saw but it is here:
Poulan.com
http://www.ordertree.com/modelinfo/POULAN-WEED-EATER/75.59.html
It sounds as though the starter spring is broken.
This thread explains how to reinstall the spring.
http://www.fixya.com/support/t1839024-broken_recoil_spring
The IPL for your saw shows all the parts and provides an idea of how they fit together. GL
Lou

SOURCE: I am looking for a manual for my Poulin Wild Thing chain saw.

you can download any manual you want at www.electroluxmfg.com.they are made in shrevesport La.I can answer any question you have about the saw.Whats your problem?

SOURCE: 18"poulan chainsaw

Start at 1.5 CCW form lightly seated then tune for performance like this:
Carburetor Adjustment by Madsens.com
http://www.madsens1.com/saw%20carb%20tune.htm
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.
There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too.

I think your starting procedure may be the cause of flooding. Flooded is the #1 cause of hard starts in 2-cycle engines. Read carefully the recommended start in your manual. most miss the second note. It should be similar to this (read 3, read it again):
Warm start in the manual says 1/2 choke BS. Close choke, (sets fast idle) open choke, pull rope.
Start Procedure
Cold:

1. Ignition on/off to on
2. Set compression release – optional step even if saw is equipped with a compression release
3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4).
4. Set compression release – optional step even if saw is equipped with a compression release.
5. Push (open) choke pull starter until it starts (usually first pull).

1. Ignition on/off to on
2. Set compression release – optional step even if saw is equipped with a compression release
3. Pull (close) choke, set fast idle (done when choke closed on some saws) – Do not pull with choke closed.
4. Push (open) choke, pull starter until it starts (usually first pull).

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SOURCE: 42cc 18 inch craftsman chainsaw

Generally this is a fuel / air ratio problem. Usually it can be solved by a carb adjustment. On the carb there are usually two screws, one marked low or L , the other marked high or H. Low is your adjustment for idle mixture, high is for mixture at full throttle. The saw should Always be adjusted to run well during the cut. Make adjustments a little at a time, then try The saw. Continue small adjustments untill the saw is performing well at full throttle while Cutting.