Hedge trimmer issue

[ianpm]

Hi, wondering if anyone can help me I have a hs45 hedge trimmer I put a new exhaust/muffler on it and my machine won’t run properly it starts but as soon as I release the throttle trigger it stops I put the old exhaus/muffler back on and it runs fine. Do I need to adjust the carburetor for the new exhaust or do I have a faulty part? Thanks

 

[Fish]

Take out the exhaust outlet screwed into the bottom of it and look. Start it up without it and see what happens.

 

[tom3]

Those pesky two strokes are pretty particular about the exhaust. I'd guess some idle mixture adjusting is needed for the new muffler due to lower restriction.

 

[ianpm]

Cheers for the advice I’ll give them both a try.