- Bring engine to operating temperature (some say cold is also fine)
- Remove all four plugs
- Disable fuel delivery fuse
- Install gauge
- Crank for three to fives seconds while in neutral and wide open throttle
- Repeat for each cylinder
- Each cylinder should be consistent or no greater or no less less than 10%
Where is the specification for a Mercury 90 FOURSTROKE?
What is an acceptable range?
Thanks for any input.