Scratching my head...

[BigRed96]

Currently working on a Husqvarna 240 and it's giving me fits. When I received the saw it would start but not idle or run for more than a couple of seconds. I tore the carb apart and ultrasonic cleaned it then rebuilt it using a carb kit. Now the saw runs and revs as it should as long as it's not in any wood. I can rev the saw all the way up and then put it in the wood and it falls on its face and any pressure applied in a downward fashion the revs drop and the chain stops. Trying to troubleshoot it I removed the muffler and the piston looks great. I put my compression tester on it and the little bastard reads 200 psi. I am at a loss as to what else to check. Please offer me some guidance before I throw this thing in the river.

 

[Mattyo]

did you check the impulse line?

 

[jacob j.]

Check to see if the intake block is cracked.

 

[RIDE-RED 350r]

Fuel line/filter?? Metering lever height correct?

 

[jacob j.]

did you check the impulse line?

The 240 uses a solid intake block, like all the other Huskies of that era and the intake blocks will crack from heat and pressure, which can cause the symptoms described above. It happens a lot on the 394 and it's maddening to diagnose.

 

[Mattyo]

i'll keep that in mind on my 394...

put together a 394 once with the intake block upside down. I actually got it to run. as soon as I touched wood it died.

credit to JMSSAWS for the heads up on that one

 

[BigRed96]

Currently working on a Husqvarna 240 and it's giving me fits. When I received the saw it would start but not idle or run for more than a couple of seconds. I tore the carb apart and ultrasonic cleaned it then rebuilt it using a carb kit. Now the saw runs and revs as it should as long as it's not in any wood. I can rev the saw all the way up and then put it in the wood and it falls on its face and any pressure applied in a downward fashion the revs drop and the chain stops. Trying to troubleshoot it I removed the muffler and the piston looks great. I put my compression tester on it and the little bastard reads 200 psi. I am at a loss as to what else to check. Please offer me some guidance before I throw this thing in the river.

 

[Simondo]

I assume you have the primer bulb fitted ...and fitted the correct way round .. also is it staying full under running ?

 

[paragonbuilder]

Ditto on the intake block. Check for cracks and orientation. Have checked for an air leak? It's definitely sounds like a fuel mixture issue.


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[Scott0154]

Check for a vacuum leak. My 036 was acting like that when it had a cracked fuel line.

 

[old guy]

I had one of those and it's little bro., the 235, your idea concerning the river is probably best

 

[Chainsaw Jim]

I'm wondering if it's either the air or fuel tank filter. Sometimes those air filters can look good but still need replaced.

 

[Landmark]

I have had this happen on a dull chains also. I would sharpen it and ck rakers.

 

[Mastermind]

Replace the carb with a new one.

 

[Onan18]

Or............


























































A dumpster!

 

[Simondo]

We got a duplicate thread running here unless im mistaken !!

 

[Mastermind]

We got a duplicate thread running here unless im mistaken !!

Fixed.

 

[BigRed96]

Fixed.

Sorry about that, I'm a bit of a dip$&@t sometimes...alright, all the time.

 

[Mastermind]

Sorry about that, I'm a bit of a dip$&@t sometimes...alright, all the time.

We still like you.

 

[paragonbuilder]

I have had this happen on a dull chains also. I would sharpen it and ck rakers.

Dull chain makes saw bog?


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