Troubleshooting an Echo chain saw

[Papaw50]

More research, if the opening gap on the ring is on the exhaust port side, it can apparently get stuck in the port and break the ring. I'll have to teat it down again this weekend.

In the mean time, today I picked up an Electric Mac chainsaw that someone threw away.

 

[Navydude]

I have an Echo CS 450 that my buddy fell through a pool cover and into the water with it. I dried it all out and of course changed the fluids. Blew it all out put it back together but it won't run. I can get it to idle rough and randomly it will rev up like the saw of old. The only thing I can think of is that the coil must have some intermittant problem now after falling and being submerged. Anybody have any suggestions I would appreciate it. This saw is only a couple months old.

 

[twinfords]

Here are a few pics.

I re-installed the piston, but couldn't see any arrow, and couldn't tell one end from the other.

I reversed the pistons orientation from my previous install; re-assembled it, but now it has kickback, as though key is bad on the flywheel.

I'll have to tear it back apart, at least the flywheel.

Well, at least I'm gaining experience........

Gary

The piston only goes in one way, usually there is a mark or arrow on top of the piston direction towards the exhaust port, also the ring/rings should be oppsite the exhaust port as well to eliminate catching on the port, did you have a broken flywheel key? also change plug even though you have spark out if cylinder you may not have it in the cylinder.

 

[chance123]

My guess is since the engine was stopped by the flywheel jamming on the (loose?) ign coil, the running engine sheared the key.