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Throttle control on mccullock chainsaw

I have a 4600 mccullock chainsaw that needs the throttle trigger put back together the saw has only been used once or twice i need a diagram.

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There is no service manual for this chain saw. Since chain saws are such dangerous tools, manufacturers do not want the end user to attempt any service or repairs beyond what is in the owners manual. If you are in fact looking for an owners manual you can contact southern supply company at 205-833-2525 or email them at southern.supply@mindspring.com and I feel sure Jason or someone there can help you.

Posted on Sep 15, 2009

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Posted on Jan 02, 2017

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I have an early 450 mccullock chainsaw could be 50 yrs old still in great nick but needs kit in carby can these be sourced or replaced with another carby please


mcculloch Mac 450 chainsaw flatback carburetor


will take a long time to find a full carby for sale
same with a non working 450 mccullock chainsaw
by the pictures the newer carby designs wont interchange

this site might give you a lead to a carby kit
mcculloch Mac 450 chainsaw flatback carburetor



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Aug 17, 2016 | Garden

1 Answer

Choke trigger on the handle will not lock to start the chainsaw


more information please..

To lock the choke on:-
1. depress dead mans trigget on top of back handle
2. squeeze throttle trigger fully in.
3. slide on switch fully down to 'full choke' position. 'it should stay there'.
4. Pull saw over until it fires once.
5. click 'on' switch up one position to 'half choke'
6. pull saw over again, saw should start running and be revving high.
7. 'blip' throttle, saw should stop revving and run on tick over.

Dec 31, 2012 | Stihl MS181 14" Chainsaw

1 Answer

Saw is idling to high will not adjust down. What do I do.


Open the carburetor area cover and remove the air cleaner so that you can observe the throttle arm and the idle speed screw which stops throttle movement to set idle speed. If the throttle arm doesn't come back completely to the screw, then likely, the throttle trigger is jammed with sawdust/dirt that prevents the throttle arm from returning. Disassemble the trigger assembly making notes of part placement as you go. You will usually find a plug of sawdust in the trigger mechanism. Recheck the throttle arm motion after putting the trigger back together. You may have to advance the idle speed screw several turns CW to be able to keep the engine running when the throttle works correctly. Idle speed should be set so that the engine continues to run, but the chain doesn't try to turn. Hope this helps!

Jan 04, 2011 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

Chainsaw runs wide open


Operate the throttle trigger to see if it returns to the idle speed screw when the trigger is released. If it seems to 'float' somewhat, the trigger assembly may be full of dirt/sawdust, or the throttle return spring on the carburetor is damaged or disconnected. When taking the trigger assembly apart, be sure to make notes so that it can be put back together correctly. Make sure the throttle plate in the bore is tight to the shaft. When the carburetor was off of the engine, did the gaskets and heat insulator seem to be ok? Any air leak behind the carburetor will cause run-away speed. As for the engine quitting, check the fuel filter, air cleaner, and muffler for plugging. Check the condition of all of the fuel lines for decay or other damage. Did you check the condition of the diaphragm in the lower chamber of the carburetor--it should be quite flexible with no holes or cracks. With the jetting set where you have it, the engine should be 4-stroking heavily. Hope this helps!

Jul 20, 2010 | Poulan Pro Chain Saw 46cc 20"

2 Answers

My pcn 4545 chainsaw has started to over rev upon starting. The idle adjusting screw is backed off all the way and not the cause of the problem. Can you please tell me how can this be corrected and...


Remove the air cleaner and watch the throttle arm on the carburetor while operating the throttle trigger--suspect that the trigger assembly has acquired sawdust and dirt sufficient to limit proper travel of the trigger mechanism. Careful notes as you dis-assemble the trigger will help get it back together properly. There is little except proper maintenance to prevent debris accumulation in the trigger mechanism. Note: air leakage behind the carburetor can also cause high idle speeds--make sure the carburetor is fastened securely and that there are no flaws in the gaskets and heat insulator located behind the carburetor. Hope this helps!

Jul 13, 2010 | Ryobi 18-inch Electric Chainsaw Chain Saws

1 Answer

Throttle linkage


It seems that Mac engineers could have come up with something better than the M.M. kluge that they did. The problem is hooking the wire link to the plastic hook on the trigger plastic casting while juggling the front case and engine body. It appears that it should just snap together, but knowing how plastics get with age, it would appear that the trigger should be replaced every time the case comes off. I had trouble with mine and wound up straightening out the wire link end somewhat to force the parts together--it continues to work though. Hope this helps!

May 05, 2010 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

2 Answers

Trigger on poulan 3314 does not control speed. Saw runs at constant speed, somewhere above fast idle.


Open the cover over the air cleaner so that you can observe the action of the throttle cable and carburetor lever. Operate the throttle--normal action is lever wide open at full throttle and lever resting on idle stop screw when throttle released. If action is restricted, disassemble the handle where the throttle trigger is located and clean out the sawdust. Recheck throttle action. The throttle cable shouldn't require lubrication. Clean the air filter and check the operation of the engine. Hope this helps!

Jan 27, 2010 | Poulan Pro 16-Inch 38 cc Anti-Vibration...

1 Answer

Crafstman chainsaw at full power when started


If you had this apart, a few things may have happened. First the linkage from carb to throttle trigger maybe jammed between plastic housing or linkage may have come apart and throttle is in the full open position. You'll have to take this apart again and follow the linkage between carb and throttle trigger to ensure all is connected and moving freely and properly. Use care when putting housing back together.

May 10, 2009 | Husqvarna Craftsman 36cc, 16 In. Gas Chain...

2 Answers

How to fix throttle trigger on a poulan chainsaw?


The trigger, lockout or trigger/lockout spring has failed of may have debris stuck in handle. remove handle cover and inspect. If parts broken follow this link for parts breakdown.

http://www.ordertree.com/modelinfo/PWE/PP4218AV/75.PP4218AV.1.7.1.html

Apr 01, 2009 | Poulan PP4218AV 18" Chain Saw

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