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Husqvarna 14' Model 141 Chain Saw

Husqvarna 14' Model 141, after cutting for approx 10-15 minutes the engine revs to extreme rpms amd using the on/off switch will not cut it off - must use the choke and choke it down. Any solution?

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THE IMPULSE LINE FROM THE CARB TO THE CRANKCASE HAS POSS FAILED, CHECK THE FUEL LINES FOR CRACKS AND PINHOLES, MAKE SURE THE INLET SCREEN INSIDE THE CARB IS NOT BLOCKED, WORSE CASE CENARIO THE ENGINE HAS A BLOWN CRANK SEAL CAUSING THE ENGINE TO RUN VERY LEAN WHICH WILL IN TIME "COOK" THE SAWS RECIPROCATIONG PARTS. AS FOR THE SWITCH ISSUE THE SWITCH ITSELF IS PROB BAD OR THE WIRING HAS COME UNPLUGGED OR IS DAMAGED......GOOD LUCK!

Posted on Nov 19, 2009

Testimonial: "Sounds very technical - too much for me, but I will pass this info on to a repairman. Thanks very much for your response and help."

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1 Answer

How do i adjust the metering arm in the carb of a model 141 husqvarna chain saw


All adjustments made to the fuel are screw adjusted, three screws are low ideal, high ideal, throttle stop. A flat he'd screw driver should do.

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The ignition coil is attached to the spark plug cable.Also check the spark plug number for the chain model.As the chain get older you can put a cooler spark plug and try before change the coil.

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Husqvarna chain saw Model 141 running at high rpm's


You may wnat to inspect the intake manifold/boot that mounts inbetween the cylinder and the carb. Also, the impulse tube that comes from the bottom of the cylinder to the carb manifold or carb itself. Sounds like you are running a lean condition. You need to locate the source very quickly, or continued operation will permantly damage the saw. I have listed a few other things to check.
Please let me know what you find. rwvanlue

Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled (black and carbon deposits)
b) is there spark

2) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check cylinder compression

Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

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1 Answer

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Many saws made today are using electronics for engine control. If the engine rpm's starts to rev to high, the electronics in the coil will start to 'cut out' some of the spark. This is normal in this senerio.

But, now the real problem causing the senerio;

Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
5) replace gaskets/diaphragms
b) use a spray carb cleaner to clean jets, holes, and body of carb

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The tool you need is available from Randy's Engine Repair, on his E-Bay store. The price is about $10., plus $3. shipping. Phone for Randy's is (937) 927-5665. It is usually busy.
Ebay item number is: 390025452838. Buy it online. I got mine about a week after I ordered it.

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