cambl
ArboristSite Guru
Cleaning up a 1988 Jonsered 630 with a 670 top end on it .... can't remember how I ended up with this saw but not impressed with the rubber intake boot and external pulse hose so I am switching this one back to a 630 the way it should be.
Pics show the 670 setup on the left with "skirted" piston and boot, and the 630 "window" piston on the right. Both cylinders are closed port design, and the only difference is the bore size and the coating on the cylinder (chrome on 630, Nikasil on 670).
Pic of saw shows the intake boot setup.
Pics show the 670 setup on the left with "skirted" piston and boot, and the 630 "window" piston on the right. Both cylinders are closed port design, and the only difference is the bore size and the coating on the cylinder (chrome on 630, Nikasil on 670).
Pic of saw shows the intake boot setup.