I've got damn near 1000 hours on my Yami in less than 2 years (yeah, I fish a lot) and have yet to even change the plugs, let alone do anything other than change the oil and filter occasionally. It comes with a 3 year warranty, but fat chance I'll blow it up before then the way it is running. rolleyes
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The fishing was GREAT! The catching could have used some improvement however........