The gauge jumping around right from the get go does tend to point to an electrical issue of some sort. I agree that at 200* you would not be able to rest your hands on the exhaust risers far any amount of time. Having a random wire in the helm would not surprise me...CC has not always been known for their clean wiring jobs.
Also, sorry if I came off harsh in the comment about your brother in law. It was not intended. When I bought my first boat, I also knew next to nothing. On the test drive, I noticed the temp go up to 190-200 and asked the sales guy about it and he had the same reply, "That's normal...same as every car." Only after visiting this and other CC forums did I learn the truth, which is why they are here. Glad you found the site and I am sure we will figure out the problem. Let us know what happens when you put in the new gauge.
Also, sorry if I came off harsh in the comment about your brother in law. It was not intended. When I bought my first boat, I also knew next to nothing. On the test drive, I noticed the temp go up to 190-200 and asked the sales guy about it and he had the same reply, "That's normal...same as every car." Only after visiting this and other CC forums did I learn the truth, which is why they are here. Glad you found the site and I am sure we will figure out the problem. Let us know what happens when you put in the new gauge.
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