128LD string trimmer won't start

[zamboknee]

My trimmer all of the sudden sputtered out while I was using it. Couldn't get it to start after that.
It would run with the choke fully open for a bit but wouldn't stay running.
Here's what I've done to try and resolve the situation.

• Replaced spark plug
• replaced air filter
• replaced fuel filter
• drained gas and replaced with a premixed 50:1 fuel/oil.

The previous gas was kind of green. I put some gas water remover in the old batch but that didn't seem to help. Hence the new gas.

Any idea what's next to look at here?

 

[zamboknee]

Is this a scarred piston? carburetor replacement?
Thoughts?

 

[dougand3]

Running some on choke points to fuel delivery problem. Can check with a spray bottle of 2 cycle fuel (don't use starting fluid - no lube). Get it running and keep spraying fuel into carb throat. It you can keep running 15 secs or more, I'd disassemble, clean and replace diapraphms in carb. Or buy a new one.

 

[dougand3]

Carb is 545081848. OEM is $32 or AM is ~$11.

 

[zamboknee]

Thanks @dougand3 I'll give that a try.