I bought a 1984 Ebbtide inboard boat from a guy last year. Unfortunately, the boat has been redone, and the engine has apparently had work as well so there isn't any sort of model or serial numbers on the engine or boat at all. The boat ran great all summer.
The original operator's manual was in the boat and the cover said it was for Mercruiser 200MR, 230MR and 260MR. The images in the manual match my engine exactly, but I'm not certain which one it is.
The engine does not seem to be drawing in water for cooling. I took the boat out yesterday and it seemed to be overheating. We pulled out immediately so as not to damage anything any further.
Today, I started taking hoses off the thermostat and water pump to see if there was any sort of blockage and there wasn't. I also started the engine with muffs on and checked the hoses again and they were completely dry. This is what makes me think there's something up with the water pump. I was concerned that I had some freeze damage (even though I winterized the system), but there isn't any water in the oil, which makes me think the block is OK.
I'm pretty good mechanically, and have worked on a couple of boat engines as well, but I'm not familiar with this model.
1. What else can I do to confirm what the problem is?
2. Where's a good, reputable online place to buy rebuild kits (if necessary)?
3. I've noticed there are "upper" rebuild kits and "base" rebuild kits. How will I know which I would need?
4. What is a good, solid repair manual for my engine type?
Thanks in advance!