Is it slowing down at all? If so, you may just not have "burped" the system sufficiently when you replaced the coolant.Some cars were notorious for that, which is some cases caused problems down the road.RonWild CheriC&C 30-1STL
On Sunday, October 7, 2018, 3:28:42 PM CDT, bwhitmore via CnC-List <cnc-list@cnc-list.com> wrote: Hello all, 1 have a 1994 C&C 37/40+ with a Yanmar 3JH2E engine. When I changed the coolant last year, it seemed like about 12 oz less coolant went back in. Since then. I've noticed the overflow tank seems to be dropping a little, and I've topped it off 3 or 4 times. In total, I've probably added 16 to 32 ounces of coolant. The exhaust exits the boat downward, so I don't get a good view of the existing exhaust, but I'm not seeing evidence of steam as I would expect if I had a head gasket leak. The oil looks fine. There's no evidence of oil in the coolant. There's no evidence of coolant leaking externally ( ie orange in the engine bilge). We get the boat off the dock 4 to 6 times a month, each time motoring about an hour per trip (30 minutes out, and 30 minutes back in after sailing. I've only owned the boat about 18 months, so there could have been a preexisting condition. Any ideas, and is there a way to figure out what is going on? Should I be worried? Thanks! Bruce Whitmore
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