Question about McCulloch 13HP 338 Cc Portable Generator # FG6000MK

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Almost new McCulloch 7800 won't start.

Decided to pull the generator out today and fire it up. It is basically new and has only been run once for two hours. Pulled the plug and checked it (looked great). Turned the fuel on and pushed the electric start. Would turn over and over but would not fire up. First checked the fuel line and went so far as to blow the whole thing out. Pulled the plug again and squirted some gas into the cylinder. Hit the starter again and it fired up for a few seconds. Appears I am not getting fuel into the engine.

So any ideas as to what to go after first before I start taking things apart. Thanks!

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  • Anonymous Feb 01, 2009

    I thank you for answering my question so quickly. Hey I haven't worked on a carbureted car since high school (30 years). I did pull the carb off the intake just to see if anything obvious stood out. Nothing did and I tipped it to make sure there was indeed fuel in the carb. So with that where is the needle I am looking for in the carb. Thanks again, Kevin

  • Thomas F. Schneider May 11, 2010

    The carburator float bowl first. See if the needle is stuck shut along with the float in the up position.


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This is a typical problem with small engines that are not used often or only used seasonally

The problem exist when it is not prepped for storage properly, meaning that the fuel is not shut off and the engine allowed to burn off the remaining fuel that's left in the carburetors float bowl, causing the un-spent fuel to sour and later creating a condition called varnishing which clogs the carburetor venteries

All of these steps will require the use of skin and eye protection!!!

The solution is to replace the old fuel in the tank with fresh, its not a bad idea to replace the fuel filter at this time, then with the petcock in the off position remove the carburetor float bowl, inspect the gasket or seal for imperfections (replace as needed) and clean it along with the float assy. and piston check valve with a spray type carburetor & choke cleaner and gently wiping with a clean lint free cloth so as to remove all yellowish colored varnish and any debris, before reassembly place a glass or metal catch pan or bowl under the carburetor and turn the petcock to the on position to allow fresh fuel to flush out the fuel line and now LIGHTLY & GENTLY (without resistence) lift the float up, the fuel should stop flowing. If it does not stop, repeat cleaning procedure. If it does turn the petcock to off and reassemble. After reassembly turn the petcock to on, the engine should run.

Another preventive step is the use of a product called STA-BIL fuel stabilizer

Posted on Feb 20, 2009

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