Fuel tank capacity Monaco Cayman 2003 Diesel

CA Traveler wrote:
The Centroids I've had are very accurate, repeatable and stable. The design is 2 concentric tubes and when the fuel reaches the bottom of the tube that is E on the gauge. The tube length is cut to length so that the gauge reads E when there is about 20% of fuel remaining in the tank.

I'll respectfully disagree. I'm not just repeating what I heard. I owned a Monaco Diplomat for 9 years and had to adjust the gauge twice. The Centroid may be an accurate gauge when used in a fuel tank that is not mounted in a vehicle, but when it's mounted in a motor home and especially a large side to side tank like Monaco used, it's far from accurate.

I adjusted mine and many others. They are easy to adjust from the driver's side fuel door panel, once you clean the undercoating overspray off.

To adjust, you need to note where the needle rests in different situations. I estimated about 80-85 gallons in my 100 gallon tank were useable. I wanted 40 gallons to be my half a tank mark. I noted where the needle was when I took 40 gallons of fuel. I also noted where my gauge was when it was full.

When you adjust the sending unit, turn on the ignition and give the needle at least 20 seconds to come to rest after each adjustment.

I eventually got mine to show a half tank when I reached about 40-45 gallons. With that said, the unit still jumped around to different positions at various times, but would more often come back to the same spot.

Lastly.....there are thousands of Monaco owners with the Centroid gauge that will tell you they are FAR from accurate or consistent.

My new coach (Freightliner) has a more compact 100 gallon tank that is longer front to back than side to side. It's mounted just behind the front axle between the frame and is FAR more accurate than the Monaco/Centroid unit ever was.