My trimmer starts but after warming up stops and wont start again

Yes, I recommend contacting your local authorized service center for assistance.

You may contact the manufacturer, download manuals, check fuel/oil ratios, order parts, find your local service center, and view other resources using these links:

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What is the correct fuel mixture for McCulloch products Chainsaw Trimmer...
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I trust this information has proven beneficial.

Once started and warmed up, then replace choke to run position. The choke will be completely open (non-restrictive).

You may contact the manufacturer, download manuals, check fuel/oil ratios, order parts, find your local service center, and view other resources using these links:

Contact us
User manuals
What is the correct fuel mixture for McCulloch products Chainsaw Trimmer...
McCulloch Service
McCULLOCH PARTS ACCESSORIES

I trust this information has proven beneficial.

Check for plugged fuel tank vent. Vacuum builds up then fuel stops. Also check if it has a low oil presssure switch that might cut it off (check the oil level). This engine has many variations so finding a specific problem is not easy.

Bit late to help the owner of this question and yes it could be a carbie issue but also check the idle speed. If it has dropped out of calibration and is idling too low it will start then stop. Try starting with some throttle, keep it running if you can until it warms up then let the throttle go back to idle. If it stops check to see if opening the idle screw solves it.

Check that there’s spark. It may be the ignition armature.

Is the choke opening up all the way after it warms completly up ? and have you checked the fuel lines to the gas tank they might have got pinched in wreck.

have you tried a new spark plug buddy

Carburetor high speed adjustment ( screw nearest the filter ) open ( counterclockwise ) 1/2 turn.
Adjust again as needed to run when hot.
make sure the gas mixture ratio is as required.
Henry

Crank sensor or module. Check fuel pressure too.

A reason for hard shifting could be a problem with many things with various degrees of seriousness. It could be your ATF( automatic transmission fluid) is low or broken down and old. This would cause the hardness and the reason for stop and go traffic effecting it. Another possibility is your transmission is just shot, and the timing gears inside are worn and not properly shifting at the correct RPM causing a **** during shifting.

Some possibilties, not all!

~Lucas