ORIGINAL: tony67
I have a moki 210 which ran good last season only about 2 or 3 gal. threw it . I tried to start it up today and it would not start not even a pop .
It also has almost no compression . The piston and cylinder look fine could it be that the piston RING needs to be replaced.
If so where can i get one
Tony...
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I agree with the other poster. Most likely it is gummed up and the ring is stuck, hence, the low compression.
OR, you ran the engine way too lean during its last flight and damaged the ring's metal tension. This tension holds the ring against the cylinder wall and provides the compression that is needed to run properly.
The first possibility, a stuck ring, is easy enough to solve. Pull the glow pug and drop some fuel into the cylinder. Give it some time to see if the fuel breaks the ring free. This is the most likely problem.
If this doesn't work after multiple tries, it is time to send the engine back for servicing. I do not recommend replacing the piston ring yourself in such an expensive engine unless you are a professional cycle or automotive mechanic. It is easy to damage that expensive cylinder wall.