HELP! Ms200t running issues

[Tom hadlow]

Hi I have a ms200t that idols fine but accelerate poor (bog when the throttle is pulled but after a couple of blips it will run at full throttle fine) I have tried al, the normal culprits
Setting of low speed screw too lean,Setting of high speed screw too lean,Inlet needle sticking to valve seat,Diaphragm gasket leaking
Metering diaphragm damaged or shrunk,Impulse hose damaged, kinked or not pushed onto stub below handle housing,Tank vent faulty,Leak in fuel hose between tank and fuel pump I have all so fitted a new spark plug and made sure their a strong spark. But still no luck is there anything that I might be overlooking any help would be much appreciated thank tom

 

[bogieboy]

Perssure test the crankcase. Possible crank seals worn?

 

[drf256]

Perssure test the crankcase. Possible crank seals worn?

This.

 

[Brad Button]

This.

Have you pulled the muffler and checked the spark arrestor?

 

[bogieboy]

Have you pulled the muffler and checked the spark arrestor?

I doubt that the spark arrestor is plugged, as it will throttle up after a few blips of throttle, sounds like an air leak to me, not a restriction

 

[Lone Wolf]

Replace the carb with OEM.