Re: yamaha 200 ss
Welcome to iboats.

<br /><br />Those numbers aren't specified due to great inaccuracies in compression gauges. Hook any two up to the same motor and you'll get different readings. Basically, you're looking for over 100psi varying by no more that 10% to 15% between cylinders. But that 100 psi figure is only meaningful if the gauge is accurate. Concentrate mostly on the 10-15% max variation.