Hello
I've got two webra 1.20 engines, same muffler, same prop, same glow plug, same fuel but one runs fine a 17x6 prop, the other one has problem turning a 15x8.
I don't know what to do to have both at a fairly same power.
I went all the way down from 17x6 to 15x6 to know which one fits the best the engine, 16x8,16x6,15x8,15x6.
When I opened the engine, the ring was half "welded"to the cylinder so the compression was poor, actually when you flip it by hand you barely could notice when the piston went all the way up.
After noticing this, I loosened the ring from the piston so it could have more power, in fact I felt more compression when flipping it but the power in the air remained pretty much the same.
I did not break-in this engine, I bought it used so I don't if the engine overheated at some point and "welded" the ring
I am thinking about getting a new ring for this engine just to see if it could improve its performance.
By the way about the other engine I could not feel happier
Any feedback or shared experience would be highly appreciated.
Regards
Omar