For a 2004 four-stroke Mercury outboard engine, the compression should typically be around 120 to 150 psi per cylinder, depending on the specific model. It's essential to ensure that the compression readings are consistent across all cylinders, ideally within 10% of each other. If compression is significantly lower in any cylinder, it can indicate issues such as worn rings or valve problems. Regular maintenance and checks can help maintain optimal engine performance.
The correct spark plug gap for the 2004 model, 40 hp Mercury outboard 2 stroke is .040 in.
depending on hours 120lbs------165lbs there should not be more than a 5lb difference between cylinders
I just had my 2002 115 annual service done and compression was 215 to 224. The mechanic said that was a real good range.
12.0:1
11.0:1
4 stroke
The cast of Compression - 2004 includes: Greg Starr as Acting workshop attendee
2004 Yahama 4 stroke 225hp oil filters
where is the solenoid on a 2004 mercury sable
Messenger was launched in 2004, and is headed for Mercury.
Should be 4x6. 3x5 is the other size.
It has a chain that requires no maintenance and should last the life of the engine.