MS270

[Arthur Moore]

I have an MS270. It originally stopped running due to the inlet tube ripping open. This was caused by one of the anti vibration mounts breaking and causing the engine to move too much. I fixed that too but it still wouldn't run. So I fitted a new carburettor,filters, supply pipes, fuel tank vent and ignition coil. It ran on fast tickover for about a minute, if I revved it, it cut out almost immediately. I bought another carburettor with similar results. Compression is good. Everything seems good, it just won't run for more than a minute, 2 or 3 if I don't rev it. Also tried various settings on fast and slow screws with no change. Any suggestions?. I am at my wits end.

 

[Stihl 99]

Welcome what carb are you installing on it?

 

[Arthur Moore]

Welcome what carb are you installing on it?

Ive tried 2 ir 3 carbs all with similar results. All chinese. I think one was a Zamdoe.

 

[STIHLTECH]

Vacuum and pressure test is warranted in this situation.
You did check the pulse hose, right?

 

[Arthur Moore]

Ive tried 2 ir 3 carbs all with similar results. All chinese. I think one was a Zamdoe.

This is where I'm lacking experience. Where is the pulse hose?

 

[jcquade]

 

[Arthur Moore]

Pulse hose is fuel supply hose. New one fitted with no leaks. Fuel is definitely getting to carb. Still doesn't run correctly. Tried various settings on high and low screws. Still no good.

 

[Arthur Moore]

What does the vacuum and pressure test entail?

 

[jcquade]

 

[jcquade]

about $30 on Amazon