Primer bulb drawing air

[GardenKit]

It's worth checking that the pump diaphragm and gasket have been assembled the right way round before getting too carried away.

[Phil H]

How do you check they are the right way round?
Who are suppliers of quality Walbro carb kits?

[adw]

Pump side diaphragm first followed by the gasket and cover, metering side gasket first followed by diaphragm and cover.

[adw]

Rowena hire in Bangor.

[Phil H]

Thanks for the info.
Ill order a kit then have another look at the carb.

Cheers Phil

[Phil H]

A quick look-see yesterday, all spotless inside, all looks ok apart from there was no washer under the screw that holds the top of the carb on - presumably this is required & a potential source of my issues?

Hopefully give it a whirl today.

[peatff]

1 hour ago, Phil H said:

A quick look-see yesterday, all spotless inside, all looks ok apart from there was no washer under the screw that holds the top of the carb on - presumably this is required & a potential source of my issues?

Hopefully give it a whirl today.

 

No washer on any of mine so it's not going to be your cure. The casket under the casing seals it.

 

 

[Phil H]

A strip/check and all looks perfect and clean but still drawing air from somewhere on the carb. A slow release on the primer draws bubble free fuel from the carb, release it quickly and the pipe from carb to primer is full of bubbles.

[adw]

Regardless of the bubbles does the bulb 1/4 fill? and does the machine run at all?

[Phil H]

Regardless of the bubbles does the bulb 1/4 fill? and does the machine run at all?

When cold, yes the primer bulb is fairly full & the saw runs fine.
When hot (say after 5 or 10 mins cutting) the saw will bog/cut out, primer bulb struggles to pull fuel & the saw won't run but is ok again when cold.