Tanaka Brush Cutter issue...

[Arndrew]

TCG24EAS(SL) will not rev....not a heavily used machine. I have checked the spark suppresser, its clean. It idles OK but sounds choked/flooding when the throttle is opened and won't accelerate. Does the coil have built in ignition advance? I have come to the conclusion it is either the carb or the coil - which would you go for?

[ChrisNewport]

Is it left for long periods with fuel in? If so its more than likely needs the carb cleaning.

[adw]

If the spark arrester is not blocked then is the exhaust port itself blocked, or the muffler, slacken the muffler off and see if it will rev, if not remove the muffler completely and check the exhaust port for blockage.

[GardenKit]

Firstly remove the spark arrestor, it's almost certainly the problem. 2 little screws an 2 minutes work

 

 

[Arndrew]

Not spark arrestor or exhaust issue - It has had fuel left in it so I will try and clean the carb...

[Arndrew]

Have stripped the carb and cleaned.....removed muffler, exhaust port ok. Still the same - could it be the coil?

[woody paul]

Has it got a barrel butterfly in carb have had problems with these turning on plastic leaver on the top had it once ran flat out with out touching trigger and shut down when pulled. 

[Arndrew]

No butterfly, it appears to sound flooded when trying to rev so I think extra fuel is going in....do you know if these coils have electronic ignition advance....could it be not advancing the spark when reving?

[woody paul]

So no butterfly it must have barrel with a hole setup which turns to let more air in. Have you tried adjusting carb.  

[Arndrew]

there appears to be only one screw which I assumed was idling speed, it acts on the cable cam - I should say that when it failed originally, it happened suddenly whilst in use. So from your comment the screw affects the air/fuel ratio?