Hi guys i just bought my first boat and took it to the sea, I did a tune up before, I changed the water pump, spark plugs and engine oil, after a few minutes of running in the water the alarm sounded and noticed that the temp was almost reaching 200 so i turned it off and had to tow it back to land, Im very familiar with auto mechanics but total newbie when it comes to marine stuff, I took the cooling system apart today looking for something wrong in the system, I thought maybe a stuck thermostat or something like that was causing the prob. I was reading in the posts about impellers, does my engine on the outside part have an impeller? or only the water pump?, i noticed 2 bilgie pumps 1 its on the floor below the engine i turn it on and it takes the water of this compartment and there's another one out side the boat close to the outside part of the engine, what it this pump for? its not conected to n e switch it runs 2 cables to the batery compartment with little pliers, all the help will be greatly appreciated, i dorve 2 hours to put it in the water and the 1st experiance was a failure, I have the boat in my shop and puted a big tank and sumerged the peropeller inside the tank how do i test the cooling system with out going to the sea again?
