"John Wentworth" wrote in message ...
Different gauges will read different numbers, and motor temperature has an
effect as well as throttle position. They key is that all cylinders should
be within 15 psi. I would expect your readings to be between 100 and 130.
"Clint G" wrote in message
om...
Can I get the recommended compression range for a mercury outboard
anywhere online without purchasing a manual?

Thanks, I'm looking for the range for a 2000 50 HP 4-Stroke Merc.