Chainsaw Repair

The 025 just has the grub screw in the piece of fuel line for a vent? It only restricts but does not stop air flow into or out of the tank

I've seen the vent side of the metering valve packed with saw dust

The impulse line on the 025/MS250 is sometimes somewhat critical. It is hard to see up under the poly air shield. But it will almost slip off the spud up under the boot and will cause the impulse to alternate between OK and bad. Almost need a hemostat to reach under there. The hose is better about staying on the crankcase but there is more heat on that end and the rubber will get hard.

Keep in mind that the spark plug and switch wire from the coil fit in through a little square slot just above the coil in that polyethylene heat shield. If the plug wire is brought up along the coil side of the heat shield and crossed over the shield to the spark plug near the top - the heat shield will wear the insulation off th plug wire where it crosses the heat shield.

I make that mistake too

That reminds me I need to order some more echo black 3mm x 5mm and  3mm x 6mm fuel lines to use for impulse lines.


Thanks.