What's on your bench today?

[Richard Thompson]

I've had my second hand husky 450 on the bench today as I have found the oil tank leaks. Found the hole just below the front bar mount,

The previous owner mounted the chain incorrectly cutting through the metal plate and the plastic tank.

A quick repair with liquid gasket inside and out and hopefully it will hold till I can get some more oil proof resin

[woody paul]

Husky 357xp rebuilt it a month ago New crank seals, intake boot and everything else plus New carb change to Zama. Ran for a half a tank and seized up pressure and vac test has shown no leaks so bit of a head scratcher. Any ideas.

[spudulike]

Husky 357xp rebuilt it a month ago New crank seals, intake boot and everything else plus New carb change to Zama. Ran for a half a tank and seized up pressure and vac test has shown no leaks so bit of a head scratcher. Any ideas.

 

Most common causes are intake manifold, clutch side seal, impulse line come off, bad fuel or carb adjustment bar the EPA ones with the auto decomp.

 

Have you done a pressure/vac check again? What did you tach to?

[woody paul]

As I mentioned all new part fitted and pressure and vac tested. The carb is fix so not much adjustment.

[spudulike]

As I mentioned all new part fitted and pressure and vac tested. The carb is fix so not much adjustment.

 

I asked as sometimes parts fail or are faulty so personally, I would recheck it as is to ensure it is still airtight. Is the fuel line OK and is the gauze filter clean?

[adw]

The carb is not adjustable?? i can assure you it is, so as said you should have checked the rpm after the rebuild, dare i ask whos two stroke oil you are useing?

[woody paul]

Adw the carb is 1 with little adjustment on each screw, as for 2 stroke same as used in all my other tools with are a total of 12 machines.

Spud the fuel line is new plus filter if you mean gauze filter in carb no as new carb.

[spudulike]

Adw the carb is 1 with little adjustment on each screw, as for 2 stroke same as used in all my other tools with are a total of 12 machines.

Spud the fuel line is new plus filter if you mean gauze filter in carb no as new carb.

 

Was that a Zama carb? Was there any modification to the saw as the Zama throws in less fuel than the Walbro and I often set the H screw on modified 357s well over the standard one turn out.

 

Was the saw tach tuned on the final set up? Is the fuel tank breather OK?

 

Something has caused the issue - the fuel thing, often a seize is slightly old fuel or cheap two stroke that has no effect on all the other equipment as they are all set a bit rich and the one that goes has a slightly leaking seal and a carb that is tuned a little too lean goes bang!

[adw]

The caps are just limiters to stop you from richening the mixture and increase emissions, they can be pulled back, and the screws adjusted, you still did not say what oil this was.

[woody paul]

The 2 stroke is from my local hydraulic company in there named can but the same spec as Fuchs.

Carb was fitted as bought and no other mod to cylinder , I do not own a tach.