Cylinders Unequal Pressure.

[jholley]

I had my engine (1988 70 HP Johnson VRO) looked at this week. <br /><br />Had carbs rebuilt, etc. Mechanic told me the pressure on my cylinders is as follows:<br />112 psi.<br />110 psi.<br />90 psi.<br /><br />I haven't talked to him in detail about it yet, but I wanted to get some info before I do. He mentioned this is why I have been having some idling problems. <br /><br />What are the other things that I should be concerned about?<br /><br />Is this the type of thing that necessitates a rebuild?<br /><br />How long can the engine go as is assuming everything else is ok?<br /><br />Thanks.<br />J

 

[JB]

Re: Cylinders Unequal Pressure.

That's a bit out of spec, J, but not necessarily critical.<br /><br />Do a thorough decarb, then check it again.<br /><br />Good luck.