Small Engines (Lawn Mowers, etc.): McCulloch MAC 10 chainsaw, cement mixers, adjustment screws

Question
The chainsaw will only start if I pour gas into the carb and then keep the throttle on, it dies otherwise. The repair shop told me that it probably needs a new carb and maybe cylinder work, and may not be worth fixing because it is old. How do I rebuild the carb myself, is it simply a matter of changing the gaskets, diaphragm and needle valve? I know that I can do a compression test to chek the condition of the piston/rings. I have found an online source for the parts. Thank you.

Answer
Hello Raul:

The Carburetor Cleaning is the Same for Most All Small Engines from Chainsaws to Mowers to Some Cement Mixers.  Remove, Disassemble and Soak the Carburetor Overnight in Carburetor Cleaner (I Use Gunk). I have Found that Most People can Use a Breakdown/IPL and Disassemble the Carburetor Enough for Proper Cleaning. You Only have to Remove the Bowl, Float Pin, Float (if Applicable)  and Needle Valve and Any Adjustment Screws that Go Into the Carburetor Body. The Welch Plugs Do Not have to be Removed. Then Soak the Carburetor Body and Parts in a 1 Gallon Can of Gunk Carburetor Cleaner Overnight. The Can has a Parts Tray Inside it for the Small Parts. Once the Carburetor and Parts are in the Cleaner, you can Replace the Lid for Safety and to Prevent Accidental Spillage. Then Blow Out the Passages with Compressed Air. Install New Parts if Required. You will want to Replace the Parts Contained in the Kit. Be Carefull, as Some Kits have Parts that are for Several Different Carburetors in One. You can View a Breakdown of the Equipment at this Site Addy; http://www.emerichsales.com/parts-browse.asp and Select the Shop Online Parts and Accessories Online Parts Catalog Box. Now Select the Model Tab. Now Select the OEM and Enter the Model (UT) Numbers (example: 13-XXXXXXX). You can Also Use the Product Tab if you are having Trouble Locating the Model/UT Numbers. If there is Not a Breakdown of the Carburetor and you would Like me to Locate One for you; I Will Require the OEM (Walbro, Zama, ect) and the Model Numbers Off the Carburetor. With these I can Locate a Breakdown of the Carburetor and Better Assist you. If you Hit a Snag or this Does Not Correct the Problem,  I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Thanks.

Respectfully

John