Husqvarna 36 rebuilt but won't rev up!

[adw]

The metering lever should be level with thw sides of the carb, do not raise it, there is a bracket missing from the back of the carb in the picture, if there is a wire mesh around the internal baffel remove and throw away.

[Nate-Dawg343]

The metering lever was about 1mm below the sides of the carb, I raised it so it was flush. I found that way it raised the valve when the diaphragm pushed down on it easier, where as before it was so low I figured it was restricting fuel flow. It's made no difference regardless. Started perfectly then limps up to full revs coughing and spluttering as it goes. No back fires this time.

 

The bracket and air filter were taken off for the benefit of the photo.

 

I'll have a look at the muffler tomorrow, but I'm beginning to think fly wheel key. I'll pull that if the muffler trick doesn't work. It's really got my stumped this one!

[spudulike]

The metering lever was about 1mm below the sides of the carb, I raised it so it was flush. I found that way it raised the valve when the diaphragm pushed down on it easier, where as before it was so low I figured it was restricting fuel flow. It's made no difference regardless. Started perfectly then limps up to full revs coughing and spluttering as it goes. No back fires this time.

 

The bracket and air filter were taken off for the benefit of the photo.

 

I'll have a look at the muffler tomorrow, but I'm beginning to think fly wheel key. I'll pull that if the muffler trick doesn't work. It's really got my stumped this one!

As I said, if the saw is backfiring, it will be the flywheel key!

[Nate-Dawg343]

Right I've pulled the fly wheel - everything looks in order and the key was aligned correctly. I re fitted the little rascals and it yet it still farts and spits when you Rev it up. So I then pulled the muffler - the ports are clean and clear. So I pulled the carb to straighten the fuel pickup. I applied heat and proceeded to straighten it, everything was going lovely until I pushed it that little bit to far and cracked it, so new carb will be required now. I'm about ready to throw this thing in the river Orwell! It must be fuel flow right guys?

[Pinkfoot]

If Spud says it's the flywheel key , that's your door to success

[Breezeblock]

I've had similar before and it was a crappy ping pong ignition coil it drove me bonkers is the coil the same as a 41 if it is theres one here for you pm me if its any use to you

[monkeymoreton]

I might have a carb and ignition coil for one of these.

[cougarcreektree]

Have you checked the settings on the carb?

[JB ToolHire]

Sounds pretty much like a problem we had with a Chinese coil on a stihl fs45 strimmer, symptoms exactly the same so we swapped it for a genuine part and it worked perfect.

[spudulike]

The backfiring is a retarded ignition timing, if it isn't the flywheel key, it will be the coil causing the same issue!