Question about Troy Bilt Tb425cs 26cc 4 - Cycle Curved - Shaft Gas Trimmer with Ez - Start and Speed Spool

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Troy-Bilt TB425CS trimmer hard to start, won't accelerate

Engine spits through carb when trying to start it, acting like timing may be off. Is flywheel keyed on to shaft or is it screwed on? I have already installed new carb, new spark plug, new fuel lines and filter and fresh fuel. When the engine finally starts, it will not turn up rpm, and still spits when running near idle. Good spark, and looks like coil gap is about right.
Thought flywheel might have moved slightly if a key sheard or if it moved on threaded shaft. Any ideas appreciated.

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Hi the key is moulded as part of the flywheel on most machines these days which doesent take much to sheer off , By the sounds of it this may well be your problem.

Posted on Sep 08, 2009

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