Husqvarna 266xp not starting

[spudulike]

I think we have lost the fella.....guess he may have used the Husqvarna dipping oil

It is possible he used too much oil around the bore and flooded the saw....easy to do and usually just needs clearing and putting a bit of heat on the plug to help combustion.

[sandycb]

Gave up and got myself an old 268xp!  Anyone know where I can find a PDF of a manual? 

[Stubby]

1 minute ago, sandycb said:

Gave up and got myself an old 268xp!  Anyone know where I can find a PDF of a manual? 

@adw .......

[Macpherson]

Husqvarna 268 Workshop Manual - Chainsaw Workshop Manuals

CHAINSAW-WORKSHOP-MANUAL.COM

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Husqvarna 268 Workshop Manual to service and repair the 268 chainsaw. FREE page images or download full PDF to print or...

 

[sandycb]

23 hours ago, spudulike said:

I think we have lost the fella.....guess he may have used the Husqvarna dipping oil

It is possible he used too much oil around the bore and flooded the saw....easy to do and usually just needs clearing and putting a bit of heat on the plug to help combustion.

No...., 'fraid not. Having rebuilt the top end, was still only getting 120psi on a compression test. Dried the plug, put a teaspoon of mix directly into the chamber etc...tested the spark. No joy. I think it's probably either got a leak in the crank seal or it's not keeping a vacuum, but I don't have access to pressure / vac testing kit and buying other for the one test is not cost effective. So I've called it a day for now. I'll see how I go with the 268 and maybe resurrect the old girl if I have time! 

[sandycb]

1 hour ago, Macpherson said:

Husqvarna 268 Workshop Manual - Chainsaw Workshop Manuals

CHAINSAW-WORKSHOP-MANUAL.COM

---

Husqvarna 268 Workshop Manual to service and repair the 268 chainsaw. FREE page images or download full PDF to print or...

 

Thanks! 

[spudulike]

18 minutes ago, sandycb said:

No...., 'fraid not. Having rebuilt the top end, was still only getting 120psi on a compression test. Dried the plug, put a teaspoon of mix directly into the chamber etc...tested the spark. No joy. I think it's probably either got a leak in the crank seal or it's not keeping a vacuum, but I don't have access to pressure / vac testing kit and buying other for the one test is not cost effective. So I've called it a day for now. I'll see how I go with the 268 and maybe resurrect the old girl if I have time! 

Very unlikely as you are priming the saw with fuel and the primary compression and vacuum in the crankcase will not effect combustion, it will only effect the amount of air you are drawing through the carb and the pressure up the transfer ports (as pressure and vacuum will leak from the crankcase) and as you have already primed the saw, it should at least fire.

A teaspoon of fuel may have just flooded the saw. A burst of brake cleaner, WD40, GT85, carb cleaner etc down the carb with the throttle held open will be more effective.

[sandycb]

56 minutes ago, spudulike said:

Very unlikely as you are priming the saw with fuel and the primary compression and vacuum in the crankcase will not effect combustion, it will only effect the amount of air you are drawing through the carb and the pressure up the transfer ports (as pressure and vacuum will leak from the crankcase) and as you have already primed the saw, it should at least fire.

A teaspoon of fuel may have just flooded the saw. A burst of brake cleaner, WD40, GT85, carb cleaner etc down the carb with the throttle held open will be more effective.

OK... I will give it a go. I assume the air filter will need to be removed? Don't really understand or assume prior to the replacement cylinder and pot the saw started pretty much first time every time. I do deek that the the compression isn't quite what it was though.... used to rip my hand off. It's still pretty aggressive but not like before. 

[sandycb]

On 08/01/2022 at 13:13, spudulike said:

Very good Mr A, he did indeed say that he has fitted a new top end. He may have fitted the piston back to front, seen that before! If not, that blokes compression gauge is a bit iffy....unless it was 120 on one pull

Sorry, missed some of the replies in the thread. Yes, new piston so not scored. Properly fitted (arrow / exhaust port etc). The gauge was at a saw shop so should be fine, and multiple pulls. It hangs fine on the pull cord.... doesn't fall at all, so unless the cylinder and piston were crap to start with, I think top end is OK. I will have a look at the carb, but until it overheated the carb was fine, so not sure why it now would be shot? Bit worth a look. 

[sandycb]

On 07/01/2022 at 20:50, spudulike said:

BTW....where are you based?

And I am not looking for work!!!

Near Andover