HONDA GENERATOR LOST COMPRESSION AND REGAINED IT WITHOUT REPAIR?

A mechanic came to fix a tenant's generator, which my 7-8months old Honda generator [accessible to the mechanic as both generators are kept in the same place] was still working fine at the time and still is after this incident. The mechanic left earlier in the day and I went to start my Honda generator later that same day only to discover that my engine had completely lost compression. After several attempts to start the generator [about 8-10 attempts], the generator finally started with a large burst of smoke. I let the engine run for about a minute or two and all the smoke dissipated, then I turned it off. Now, it starts immediately with only one pull [attempt] just the way it is supposed to be, just as it was before the mechanic came by. Till this moment, it still starts on one pull [attempt] and it does not smoke. Basically, it has regained its compression without any repair done on it. I'm convinced that the mechanic tampered with my generator, I just want to know what exactly he could have done to it.HONDA GENERATOR LOST COMPRESSION AND REGAINED IT WITHOUT REPAIR

If this engine has bin storage for the winter it may have had oil in cylinder this where may get smoke. You may have had stuck cylinder this is possible for smoke if it has ben sitting with out service for the winter I have never seen this before in the years as mechinic

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