A guy gave me a washer and a nut that would work for the engine. they held tight. I can vouch for that. we fliped and fliped that engine over and over (and we really had to bear down on it) and it would go for a little bit but then would be to tight for it to continue. my plane will not idle on the ground with out zooming away, if i turn it down any more it will die (probably from the engine being so tight)
the guys said they have never seen an engine that was so tight from the factory, it was so tight there electric starter would not turn it over untill we had hand cranked it a little. even then it did little good. the only advise they could offer is to warm it up with a covering iron or hair dryer. that might help. me don't know. I think I will still go get a ringed engine though.
Was this the case when it threw the prop while taxiing? It sounds to me like you lost the
thrust washer along with the prop washer and nut. The thrust washer goes
behind the drive hub. ABC engines are perfectly fine and well suited for the hobby, you don't need a ringed engine.
don't know if double nutting would work. might try. wouldn't want to put put to much on there cause that would weigh down the engine. might try adding a small flattened area and using it to lock tight the prop nuts. that might work. would any one like to put in some coments on that idear??? purdy please.
You don't need to double nut a 2-stroke. Just get the prop nut
tight.