Author Topic: husqvarna 51 wide open throttle pb  (Read 293 times)

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Offline tassin85

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husqvarna 51 wide open throttle pb
« on: November 17, 2015, 04:48:25 pm »
hello
first sorry for my english, im french...
ive got a problem with my 51.
iddle is ok but in w.o.t. the engine's rpm go high and low like : RRRRRRRrrrrrrrrrRRRRRRRRrrrrrrrrrRRRRRRRRrrrrrrrRRRRRRR.
like a yoyo! if you know this word.

the carb settings are ok.
the air filter is clean.
the crank seals are new
the ignition is well set.
the fuel line is new.
intake pipe and seals are news
piston is nice with compression ok.

so what do you think?
air leak?
carb pb ?
fuel filter?
tank vent?

thanks for your help. im learning reading the forum.
sorry for my  english... im french...

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Offline HolmenTree

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Re: husqvarna 51 wide open throttle pb
« Reply #1 on: November 17, 2015, 06:49:17 pm »
Spark wire connection?
Plugged muffler screen?
Making a living with a saw since age 16.

Offline tassin85

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Re: husqvarna 51 wide open throttle pb
« Reply #2 on: November 18, 2015, 01:59:21 am »
they looks good...the muffler is very old... im waiting for a new one.
what about carb gaskets? i don t know how old they are.....
how to check a flywheel?
the idle is perfect.... very strange...
sorry for my  english... im french...

Offline aclarke

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Re: husqvarna 51 wide open throttle pb
« Reply #3 on: November 18, 2015, 10:23:26 am »
Tank vent?

Offline tassin85

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Re: husqvarna 51 wide open throttle pb
« Reply #4 on: November 19, 2015, 03:13:37 am »
where is the tank vent on husqvarna 51 please?

sorry for my  english... im french...

Offline fisaw

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Re: husqvarna 51 wide open throttle pb
« Reply #5 on: November 19, 2015, 10:47:06 am »
Did you pressure/vac test the saw , after repair ?    check the carburetor also. 

Offline aclarke

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Re: husqvarna 51 wide open throttle pb
« Reply #6 on: November 19, 2015, 12:59:27 pm »
Tank vent is located on the right/rear of the fuel tank. It is a long plastic piece pressed into the highest portion of the tank.  You may need to remove the rear screws that hold the tank to the crankcase and lower the rear of the tank downwards to expose the vent. 

Offline tassin85

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Re: husqvarna 51 wide open throttle pb
« Reply #7 on: November 19, 2015, 08:48:14 pm »
ok thanks i will try all the advices.
sorry for my  english... im french...

Offline tassin85

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Re: husqvarna 51 wide open throttle pb
« Reply #8 on: November 22, 2015, 07:50:48 am »
hello
i ve remove the tank vent but impossible to blow inside.
i remove the white filter with a string, is ther a way to clean it. looks like sugar...
sorry for my  english... im french...

Offline Cut4fun .

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Re: husqvarna 51 wide open throttle pb
« Reply #9 on: November 22, 2015, 08:36:50 am »
They are only $3 USD   501873101 




http://www.jackssmallengines.com/Parts-Lookup/501873101/616731/ps?gclid=CLvBlfOSpMkCFQaJaQod5iII_A

394 EPA (1998-03) Chainsaw 42 (1988-10) Chainsaw 42 (1992-03) Chainsaw 42 (1994-04) Chainsaw 42 (1994-12) Chainsaw 55 EU1 (2007-02) Chainsaw 55 Rancher (2007-02) Chainsaw 55 Rancher EPA (2006-02) Chainsaw 55 Rancher EPA (1998-08) Chainsaw 55 Rancher EPA (2000-05) Chainsaw 55 Rancher EPA (2004-01) Chainsaw 61 (1986-03) Chainsaw 61 (1986-12) Chainsaw   

Husqvarna 51 55 IPL  http://www.husqvarna.com/ddoc/HUSI/HUSI1991_AAaa/HUSI1991_AAaa_I9100014_.pdf
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