Hello everyone. I am a new member to this forum but have sought advice from Iboats for many years and this community doesn't disappoint. I have a perplexing issue on my hands and need advice from some pros. We have a Pontoon: 2006 25' Sun Tracker Regency with a Mercruiser 3.0 I/O. Two weeks ago it was running fine and then started missing for 10 min before it just stopped, dead in the water. On the wrong side of the lake. Through a series of diagnostics recommended by the Mercruiser manual, I determined that I have low compression, by doing a compression test, in all 4 cylinders: between 50 and 41lbs.
The consistency of the low compression makes me think that something might be wrong with the timing gears, as in they may have skipped a couple of teeth or come out of sink. Any other thoughts on what might be wrong before I tear into this motor? Is that something that would be considered common for the 3.0? Finally, is this motor an interference engine?
The consistency of the low compression makes me think that something might be wrong with the timing gears, as in they may have skipped a couple of teeth or come out of sink. Any other thoughts on what might be wrong before I tear into this motor? Is that something that would be considered common for the 3.0? Finally, is this motor an interference engine?