For the first time this season, I opened up both engines as I do every year. I was surprised that both engines only got to about 3,700 RPM's. The plot thickens a bit because I re-did my entire helm over the winter (all new gauges, wiring). Everything works flawlessly and the tachs on both engines appear to be accurate and are dead on with my synchronizer at cruise speed. My speed seemed to be in the ballpark but I need to check a video from last year to be sure. That's easy enough to rule in or out with my IR tach. If I selected the wrong cylinder/dipswitch would it be off like this? In past years, I've been right around 4,200.
No dead spots or any other indication that there is an issue. I assume a fuel filter is something I would "feel" like I have in the past. I ask that because I have stretched out my Racor changes a bit. I was doing them every year and after cutting one open realized that I was throwing away perfectly good filters. I have about 130 hours and about 2.5 years on them now. I should probably just use this as a reason to change both.
The other thing that comes to mind is my mechanical advance. I still have the original distributors on both engines with about 1,400 hours. It seems highly unlikely that both would stop advancing from one year to the next at the same time. Again, this seemed to be a pretty synchronized issue. I was planning on upgrading the distributors over the winter just based upon the age.
What do you guys think? The bottom is still clean and same props.
Bob
No dead spots or any other indication that there is an issue. I assume a fuel filter is something I would "feel" like I have in the past. I ask that because I have stretched out my Racor changes a bit. I was doing them every year and after cutting one open realized that I was throwing away perfectly good filters. I have about 130 hours and about 2.5 years on them now. I should probably just use this as a reason to change both.
The other thing that comes to mind is my mechanical advance. I still have the original distributors on both engines with about 1,400 hours. It seems highly unlikely that both would stop advancing from one year to the next at the same time. Again, this seemed to be a pretty synchronized issue. I was planning on upgrading the distributors over the winter just based upon the age.
What do you guys think? The bottom is still clean and same props.
Bob