Low Compression

[Powerman42]

I have a 1998 Triton 19ft with a Mercury 175 efi compression on all 6 cylinders is good just on the low side from 100 to 98 on all 6. My Question is a rebuild my only option to get better compression? Boat runs good but is idling rough and has gotten slow out of the hole is that because of low compression also?

 

[Dave1027]

With all 6 cylinders reading about the same, are you sure it's not simply your gauge reading low? Maybe your compression is fine but you have something else going on?

 

[jimmbo]

Welcome to iboats

Try using a different Compression Gauge.
How long have you owned this motor?
Did it just start acting up?
You could try spraying a couple cans of Power Tune into the Engine, to make sure the Rings are free
How was it winterized?

 

[racerone]

Any other trouble shooting done ?------They do sound amazing running on 5 of 6 cylinders.----Check spark !