Husqvarna 545 compression 110-120 lbs ?

[kamp45]

I recently purchased a Husqvarna 545 well after about 10 hrs or 7 tanks of fuel the compression reads 100 lbs. I thought this was a little on the low side so i called Huaqvarna got nowear. Next i called baileys and they informed me that 110-120lbs is normal . Any thoughts on this? My Echo cs600 is 145lbs and my dolmar 6400 is 170lbs.

 

[HuskStihl]

I cannot believe that is normal. Most modern huskies I've checked have been around 155. If it is a dished piston 550 I guess it's possible

 

[SAWMIKAZE]

I swear someone had this problem before with a 550..lemme think and try to find the thread.

Maybe it was a 545..i cant remember

 

[Fishnuts2]

I'd check my 2252 Jonsered with about 10 tanks through it, but don't have a compression tester that fits those small spark plug holes.
I'd think it has more than 100lbs or why put a compression release on them?
Make sure the release is closing properly too.


Sent from my iPhone using Tapatalk

 

[traktorz]

Why did you test the comp? Having a gut feeling it doesn't have the nominal power?

I agree a comp test is a very easy way to check the condition of a chainsaw.

What is the status of the saw? Does it start easily? Any performance issues when warm or cold? Any performance increase if changing the oil mix from 2% to 3% since should have a positive effect on compression.

 

[kamp45]

Why did you test the comp? Having a gut feeling it doesn't have the nominal power?

I agree a comp test is a very easy way to check the condition of a chainsaw.

What is the status of the saw? Does it start easily? Any performance issues when warm or cold? Any performance increase if changing the oil mix from 2% to 3% since should have a positive effect on compression.

I check the compression on all my saws when nearly new 7-10 tanks of fuel this way i can tell when the saw is getting tired and perhaps a need for a rebuild.

 

[mdavlee]

If you're using an adapter it will read low. If not then you may have a problem.

 

[RedFir Down]

I swear someone had this problem before with a 550..lemme think and try to find the thread.

Maybe it was a 545..i cant remember

Was it this thread?
http://www.arboristsite.com/community/threads/is-my-piston-trash.260997/

If you're using an adapter it will read low. If not then you may have a problem.

With your experience how much lower of a reading will the adapter cause?

 

[kamp45]

Was it this thread?
http://www.arboristsite.com/community/threads/is-my-piston-trash.260997/


With your experience how much lower of a reading will the adapter cause?

I have got two compression gauges the first reading was taking with a adapter the second was with a push and hold type gauge both gave the same reading 100lbs.

 

[mdavlee]

Was it this thread?
http://www.arboristsite.com/community/threads/is-my-piston-trash.260997/


With your experience how much lower of a reading will the adapter cause?

I can't remember but it was a good bit. I don't have a tester for them and own a 550.

 

[MountainHigh]

if you want the non-dished piston version you have to buy the 550xp.

 

[sunfish]

if you want the non-dished piston version you have to buy the 550xp.

The 545 does not have a dished piston. Same piston as a 550 and both should be around 150-160 comp.

If this saw runs good, then it's a bad reading...

 

[bigtuna]

Well crap, now I guess I havta go buy a compression tester for my 545 which is on its 3rd. Tank.

 

[mdavlee]

Well crap, now I guess I havta go buy a compression tester for my 545 which is on its 3rd. Tank.

Why worry about it? If it's down on power or something like that then get one.

 

[blsnelling]

Whoever told you that 110-120 is normal compression doesn't have a clue. Hopefully it's just your gauge.

 

[bigtuna]

Ya mine runs fine, bit of hesitation on the trigger, was that way on the very first run , in the cut its full on. Actually more than a bit.

 

[kamp45]

if you want the non-dished piston version you have to buy the 550xp.

if you want the non-dished piston version you have to buy the 550xp.

Actually they take the same piston,cylinder,carburetor,muffler the only difference is the coil.

 

[MountainHigh]

The 545 does not have a dished piston. Same piston as a 550 and both should be around 150-160 comp.

If this saw runs good, then it's a bad reading...

Ya ... my post wasn't meant to be serious, just having a bit of fun ; )

 

[mountainlake]

Pull the muff and look. If set lean it will be bad. Steve

 

[KenJax Tree]

Pull the muff and look. If set lean it will be bad. Steve

It can't be set lean its an Autotune.