Husqvarna 141 loses power under load ?

[Belinea2010]

Hi all

 

Newbie to the forum which I found while searching for a solution to my problem so hi to all.

 

I have a Husky 141 about 5 years old which I use for light pruning and small log cutting. It's never been abused or put under undue strain. I have always looked after it.

 

Recently when the chain is put under load, even very light load, the engine loses power and cuts out. No problem starting it and it idles fine.

 

I have cleaned the air filter and fitted a new spark plug (the old one looked fine and wasn't dirty or carbonend but I change it anyway).

 

I checked the fuel filter and to my untrained eye it looks ok with no visible sign of blocking but as I say, mine is a untrained mind.

 

I wonder if anyone else has come across this or may have any suggestions. I am happy to take it to a Husqvarna technician if I can't fix it myself but I worry the cost may be more than the saw is worth now.

 

Thanks everyone.

[Ray1]

Does the saw rev up ok when its not under load?

[spudulike]

Sounds like fuel restriction - under load , the saw needs more fuel and lack of it is stopping the engine making full power.

 

Before diving in to the carb, it is worth removing the muffler and looking at the piston through the exhaust port. If there are any vertical scores (not small scuffs) then you have real problems.

 

If the piston is wet and grey silver with no marks, then you need to remove the carb and it is worth removing the cover tht is held on with one screw - there is a wire gauze strainer in there the diameter of a pencil and it is common to get fine wood chip catchng in there.

 

Other than that, you may have a holed fuel line - it is possible to remove both ends plug one end and then suck and stick your tongue over one end to see if it holds vacuum, I prefer a pressure gauge:thumbup:

 

It may be worth opening the H screw up 1/4 turn (anticlockwise) but be careful as if you turn it too far clockwise, you may melt/seize the piston!

[Belinea2010]

Does the saw rev up ok when its not under load?

 

Hi Ray1

 

Yep, starts and revs all the way up just fine (when not under load)

 

Cheers

[Belinea2010]

Sounds like fuel restriction - under load , the saw needs more fuel and lack of it is stopping the engine making full power.

 

Before diving in to the carb, it is worth removing the muffler and looking at the piston through the exhaust port. If there are any vertical scores (not small scuffs) then you have real problems.

 

If the piston is wet and grey silver with no marks, then you need to remove the carb and it is worth removing the cover tht is held on with one screw - there is a wire gauze strainer in there the diameter of a pencil and it is common to get fine wood chip catchng in there.

 

Other than that, you may have a holed fuel line - it is possible to remove both ends plug one end and then suck and stick your tongue over one end to see if it holds vacuum, I prefer a pressure gauge:thumbup:

 

It may be worth opening the H screw up 1/4 turn (anticlockwise) but be careful as if you turn it too far clockwise, you may melt/seize the piston!

 

Hi spud

 

Thanks for the reply and the suggestions.

 

I'm going to go and tackle them now and keep my fingers crossed

 

Really appreciate the help.

 

Thanks bel

[adw]

Just one more thing they are quite prone too, remove the carb, remove the carb fixing plate against the cylinder, behind here you will find the rubber induction tube and impulse seal, check both for splits and cracks as this will cause a massive air leak