I hooked up my inductive tach on the boat Saturday and I could not get it to give me a proper reading. Maybe it was the short spark plug wires in close proximity, but it was indicating 6500 when it should have been around 1100. I tried it on my truck and the meter was fine.
So, I went to the store and bought an optical tack. Stuck a piece of reflective tape on the water pump pulley and I was in business.
The Faria tach in the dash is clearly way off. at 740 rpm the Faria is reading 1150. I ran it up as high as 3000 on the Faria (on muffs) and the optical tach showed 3800!!
Naturally, I crawled under the dash to check the setting. Also naturally I found a spider web and a large wasp nest. I was happy the spider web was there, because it blocked the wasps from making a direct path to my face.
With the misplaced nature removed, I found that the setting was on 2 while the label indicated that it should be on 1. Of course I tried that when I first installed it, but it was way off. 2 was the closest setting to actual.
For good measure, I tried the other settings, but came back to 2 (I think) It was getting dark and I was planning to run the boat Sunday as-is.
Now that our family outing is done, I can pull the gauge and adjust it at my leisure. There is supposedly a fine tuning 000 philips screw that I ca try as well. We shall see.
In the meantime, the boat is dong great. We had a good time Sunday,
after church.
My Tilt/Trim sender is hit and miss, so I ordered a new one. Same with my fuel sender. I will get those things freshened up and hopefully get to run it a couple more times this fall.