OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Chainsaws and Concrete Cutters Petrol Chainsaws and Concrete Cutters Husqvarna Chainsaw Problem

I have a Rancher 61 Husqvarna which won't stay running after more than a few seconds - though it will stay running with the choke closed for a minute or two if I open up the low mixture needle a whole lot.
I've taken out the carb and cleaned it out; I've changed the fuel. I changed the rings not too long ago, so I assume that I have decent compression.

The problem started one day when everything was cutting fine, but then it would cut off. I'd start it again, and it would run nicely for a few minutes and then cut off again. I was able to go through a whole tree like this, but then it got so it wouldn't stay on at all except for a few seconds.
I've adjusted the carb according to the "manual" (ie. the pamphlet that came with it) .
Is this just the carb? or could bearings or something be going to cause this? It sounds just fine when it runs (ie no clanking or sounds of strain) - but it seems like something with the fuel isn't right.

2 cycle engines (mixed gas) are pressurized (including the carburetor,fuel tank&fuel lines. All gaskets, seals, & grommets must be in good condition and tight in or for the engine to run and operate properly.The slightest leak in pressure,be it a loose carb screw,cylinder gask,or even a pin hole in the fuel line will interfer with the performance of the engine and hard starting if any at all .From what I read of your problem,or if let`s put it this way,if the saw will run fine with the throttle wide open,but dies when you let go of the trigger,the problem is your crankshaft seals are leaking.One behind the sprocket&clutch and the one behind the flywheel.This is common for chain saws after a long period of use.Change them both.If you need the part#`s contact me(Mike)at mk.farnam@gateway.net GOODLUCK

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I would check the fuel line, sounds as if
it is closing up after the engine heats,
another alternative would be to check
the fuel cap to see if the vent hole could
be clogged up

after reading your problem again, although
you have cleaned the carb, did you check
the inlet filter screen under the fuel pump
in the carb to see if it could be seared over
with old fuel residue, a part of any carb
cleaning should be to change the inlet
fuel screen filter, a very fine mesh screen,
that does just what it is inteneded to do,
stop all small particles before coming into
the carb

Before going to a bunch of trouble, I'd check some simple things, like the fuel line, but especially check the air filter. What may appear to be a fuel problem may really be a lack of air. Remove the air filter and run the saw. My 55 behaved exactly like yours, and it was a clogged air filter.

Jim,
Did you replace the fuel filter and carby diaprams. I am sure that this will fix your problem because you are not being able to get the settings on the carby to work correctly.

Regards,
Bruce

[This message has been edited by Bruce (edited 29 June 2000).]