Echo hca-2500 engine not starting

[deepat]

Hi, i am having difficulties starting an echo hca 2500 hedgecutter. When im pulling the cord you dont get a smooth run. Something is causing it to intermittently block. Engine creates bloating sound.

Sorry, really hard to explain here without a video demonstrating the problem. What is the max video size you can attach here? Or audio file?

Thanks
D

 

[deepat]

I see now that audio etc cannot be attached. Hopefully somebody can grasp the issue. Issue began with the engine cutting off. Done a few checks and then cleaned the carburetor. Can't get it to start now.

Maybe I need a new carburetor?

Cheers for any assistance
D

 

[Rand]

Have you checked for a blocked exhaust?
you can "attach" audio by hosting it on youtube then putting the link here.

 

[deepat]

Yea, will do that....checked exhaust and it looks OK
Thanks

 

[deepat]

Here we go

 

[ElectroMechanoMan]

Could it be that the top of the piston is covered with carbon deposits and it’s getting too much compression?

 

[Hirev]

Have you tried pulling spark plug and see what it sounds and feels like?

 

[grasscutter]

Is there a spark arrestor on the exhaust?

Try pulling the rope with the spark plug removed.

 

[deepat]

@ElectroMechanoMan @Hirev @grasscutter

It's goes smooth when sparkplug out, no sound of concern Don't know about an arrestor on the exhaust tho. Didn't see anything Checked the exhaust for blockage but its ok.

I could maybe clean the engine out with petrol? Aye hopefully that might work

 

[grasscutter]

Don't know about an arrestor on the exhaust tho.

The engine is partly an air pump, so whatever air comes in must also exit.

The spark arrestor is a screen put on the muffler to prevent sparks from exiting the exhaust.

The spark arrestor gets clogged up with carbon after a while.

Remove the spark arrestor and trash it if it's clogged.

Not a necessary item.

https://www.diyspareparts.com/parts/echo/diagrams/hca-2500/3428