Yamaha Waverunner Compression

Looking at a used WaveRunner tomorrow, and was going to do a compression check. What should be the compression on a stock 1800 FZS SHO?

Also, anyone know what should be the engine casting # on an 1800? The ski is a 2013, FZS SHO, with less than 80 hours.

One last question, is the hour meter on a ski reliable, or can this reading be altered by a scammer?

Thanks for any help you can provide.

Ron
 
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