Cylinder Gasket

Remove covers, remove cylinder ,2bolts clean and replaced ring reassemble runs great

1 removed piston head
2 separated crankshaft housing
3 replaced both oil seals
4 re assembled unit with new gaskets. and new piston ring
5 finished assembly of unit
6 started second pull.

Carefully disassembled engine replace rings on the piston carefully reassembled engine amazing how simple it was and how well this leaf blower worked after repair

I recently completed a small engine repair course. My trimmer wouldn't start but had good spark and compression. It'd start briefly using starter fluid but wouldn't star running. Using my new knowledge I took my non running Echo SRM-210 completely apart, separated the block and replaced all of the seals and gaskets on the trimmer. I also cleaned the unit completely and put new fuel lines and grommet and a new carb. Total time from start to finish was just about 2 hours. For less than $100 worth of parts I have a trimmer that runs as new, vs replacing it with a $200-250 new unit. I'm pretty handy but before the OPE course I wouldn't have even attempted this repair, now I have full confidence and cant wait for the next project.

Removed the starter cover and engine cooling cover.
Removed muffler and the carburetor and left fuel lines intact.
Removed 4 4mm allen head bolts and removed cylinder and head assembly,
Removed the old ring and cleaned the piston and ring groove.
Installed new ring being careful to line up pin with ring opening.
Lubricate piston and ring assembly and install head and sleeve being careful to hold the ring compressed. Do not force, it will slide in very easily.
Torque head assembly and assemble in reverse order.
Prime 6x, pull 6x, turn on ignition and start. Adjust carburetor via idle and high speed jet. The covers used 3mm screws.

1. Took apart.
2. Replaced the piston ring.
3. Cleaned the piston and the head.
4. Reassembled and tested.