Impulse tube?

[newbury]

660 easy peasy to change over.

Also make sure sure your clutch springs still good or shoes wore and staying engaged. GL

Last 660 I did I just used oem echo black line 6mmx3mm for impulse.

That's what I'm hoping but a video would sure lower my stress level about messing the saw up.

 

[crazyal]

BTW the fact that the gas/ fuel mixture goes into the crankcase before going into the cylinder to get burnt is why 2 strokes need to have oil mixed in with the gas. It's that oil that lubricates the bearings and piston.