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Going to check out used ski, want to make sure I do compression test correctly.
Some say take all plugs out, some say one at a time. Some say ground plugs that are out, others say press stop button and well as start button so you don't have to ground. I know you must have full throttle. Some disagreement on cold motor vs. hot, too.
I think I have a handle on the numbers: 2 cylinder between 140 and 150, 3 cylinder 120-130 with all variations 10% or less.
Is there absolutely one correct way? Yamaha specifically if it matters.
Thanks.:confused:
 
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