550 XP on the spot buy..

[peatff]

10 hours ago, Peasgood said:

Is it possible to flood the engine by excessive pumping of the bulb?

Always hesitant to pump too much because of this concern.

It shouldn't be, unless the bulb is faulty. It's supposed to pull fuel through the carb not pump into it.

[openspaceman]

48 minutes ago, peatff said:

It shouldn't be, unless the bulb is faulty. It's supposed to pull fuel through the carb not pump into it.

That's right and if the carb has got warm enough that a vapour bubble is causing the starting problem it pulls through fresh colder fuel.

 

I didn't like the bulbs initially but from whenever I can remember Husqvarna saws have had problems if you sit them down in hot weather after very hard work and having this purge bulb seems to solve the hot start problem.

[Peasgood]

Thank you both

[spudulike]

18 hours ago, Gimlet said:

Anyway... 

Cleaned it up and investigated today and I can't find anything wrong.

 

Difficulty getting the cover off is a side issue. The worry is why it suddenly refused to spin up with the brake off and why the bar end sprocket seized and wouldn't turn. 

 

Brake and cover were fine. Quite shitty, so cleaned them up and cover goes on and off no problem. Took the bar and chain off, started the engine and blipped the throttle and immediately oil began to pump from the oiler vent as it should. Reassembled and fired up again and it took ages for any oil to appear on the bar. When it did it seemed very meagre. Wound the oiler screw open to increase flow and it didn't feel right. Didn't just unwind like it does on my 365, but sprung outwards and stopped, like it was on a cam. And when I adjusted the chain tension, the tensioner felt wrong as well. On my 365, if I want to I can turn the screw smoothly until the chain is like a guitar string. On the 550 it doesn't seem to move the bar properly. The screw goes tight and stops before the chain is at the desired tension and if you persists the bar twitches upwards rather than moves forward. you have to wriggle the bar up and down to get the screw to turn and get the chain to tighten correctly. Yet, with the cover off the tensioner screw turns perfectly and the pin travels up and down smoothly as it should.

 

I'll see how it goes but I suspect there is something amiss with the drive train. Something isn't aligning correctly and I'm not convinced enough of the the oil is getting onto the bar (I did notice the saw left a pool of oil in the back of my truck after use, where the 365 does not. Something is not quite right with this saw. 

If the bar sprocket has seized, it may be the reason for the difficulty in adjusting the chain tension. Use a bit of WD40 on it until it is free. Is there any blackening or is it getting very hot if you just rev the saw - it may be damaged or have a faulty bearing.

 

When the chain was removed, was it nice and free or a bit tight here and there as it is when the oiler isn't OK?

 

Look at the inside of the clutch cover in the middle of the brake band, is there any damage where the clutch has been rubbing - there is a big "C" moulded in it to stop the clutch spinning off - it goes to shiny metal if the clutch has spun off badly.

 

Other than that - I am assuming the saw is running 0.325 chain on a small Husqvarna bar mount - not the one you use on your 365.

 

You could take a pic of the clutch side of the saw and the cover and post it, we may see something.

 

[gary112]

18 hours ago, Gimlet said:

Anyway... 

Cleaned it up and investigated today and I can't find anything wrong.

 

Difficulty getting the cover off is a side issue. The worry is why it suddenly refused to spin up with the brake off and why the bar end sprocket seized and wouldn't turn. 

 

Brake and cover were fine. Quite shitty, so cleaned them up and cover goes on and off no problem. Took the bar and chain off, started the engine and blipped the throttle and immediately oil began to pump from the oiler vent as it should. Reassembled and fired up again and it took ages for any oil to appear on the bar. When it did it seemed very meagre. Wound the oiler screw open to increase flow and it didn't feel right. Didn't just unwind like it does on my 365, but sprung outwards and stopped, like it was on a cam. And when I adjusted the chain tension, the tensioner felt wrong as well. On my 365, if I want to I can turn the screw smoothly until the chain is like a guitar string. On the 550 it doesn't seem to move the bar properly. The screw goes tight and stops before the chain is at the desired tension and if you persists the bar twitches upwards rather than moves forward. you have to wriggle the bar up and down to get the screw to turn and get the chain to tighten correctly. Yet, with the cover off the tensioner screw turns perfectly and the pin travels up and down smoothly as it should.

 

I'll see how it goes but I suspect there is something amiss with the drive train. Something isn't aligning correctly and I'm not convinced enough of the the oil is getting onto the bar (I did notice the saw left a pool of oil in the back of my truck after use, where the 365 does not. Something is not quite right with this saw. 

Sounds a bit like the wrong bar is on it

[spudulike]

Pic of the bar ID info near the mount would also be good.

One of my sayings is that there is always a reason...the hard part is finding it!

[Ben Pinnick]

Sounds like the pump hose is loose or the bars not oiling - one or t'other likely caused your puddle. This happened to my little husky (loose oil hose) but it's otherwise been flawless. The 20" stock bar on the big saw on other hand.... I've had similar issues and it's definitely the right bar for my saw and chain. It also threw the chain once too for reasons I still don't know. Swapping to a Tsumura bar now, although I've not yet had a chance to test it. 

Edited February 2, 2022 by Ben Pinnick

[spudulike]

I think the OPs puddle was coming from the oil channel as it should rather than the "breather"as he said.

He needs to check the oiler hole in the bar if he hasn't already if it pumps oil but not with the bar on.

The most simplest of checks is to point the bar tip at a clean surface and rev the engine. you should get a nice line trace of oil after a second.

[Joe Newton]

On 31/01/2022 at 22:41, AHPP said:

In plain English it means mistake proof. Huskys aren't, which is why they're crap.

They're not idiot proof, for sure. You know what they say about that though...

[Guest Gimlet]

22 minutes ago, spudulike said:

I think the OPs puddle was coming from the oil channel as it should rather than the "breather"as he said.

He needs to check the oiler hole in the bar if he hasn't already if it pumps oil but not with the bar on.

The most simplest of checks is to point the bar tip at a clean surface and rev the engine. you should get a nice line trace of oil after a second.

It did leave a trace of oil when revved but it was very faint. I'm sure it's under-oiling. I'll try and take another look tomorrow and post some pics.