Hi All,
After I had an issue with my heads (2 of the exhaust valves got tuliped 370 hours) i had a mechanic remachine the heads and install stainless steel valves. After I picked up the boat the engine ran great but very shortly I've noticed that it consumes an oil. After doing something about 20 hours I got to conclusion that I'm burning about 1 qt every 5 hours which is a lot. I brought the boat back to the mechanic and left it with him. He called me back saying that after doing compression test it looks like one of the cylinders got lower compression (110 rest of the cylinders was fine) and thats why I'm using so much oil. He said that when engine failed originally its possible that besides head block also could get some damage. I didn't burned any oil before. I'm finding hard to believe that the engine burns 1 qt every 5 hours because one of the cylinders. I don't get any smoke while running the boat which in this oil burning ratio it should be smoking like crazy. No oil in the bilge. It smokes a little bit at the start but it goes away after a minute. Might be carburetor. I'm about to perform dry and wet compression test and just ordered leak down tester to investigate the problem. Do you have any advice as where to look? I'm thinking that maybe one of the valve seals is leaking badly and maybe instead getting inside the cylinder it gets directly into the exhaust and thats why I don't get any smoke. Not sure how to argue with the mechanic which obviously is not anxious to investigate the problem. Thanks in advance.
After I had an issue with my heads (2 of the exhaust valves got tuliped 370 hours) i had a mechanic remachine the heads and install stainless steel valves. After I picked up the boat the engine ran great but very shortly I've noticed that it consumes an oil. After doing something about 20 hours I got to conclusion that I'm burning about 1 qt every 5 hours which is a lot. I brought the boat back to the mechanic and left it with him. He called me back saying that after doing compression test it looks like one of the cylinders got lower compression (110 rest of the cylinders was fine) and thats why I'm using so much oil. He said that when engine failed originally its possible that besides head block also could get some damage. I didn't burned any oil before. I'm finding hard to believe that the engine burns 1 qt every 5 hours because one of the cylinders. I don't get any smoke while running the boat which in this oil burning ratio it should be smoking like crazy. No oil in the bilge. It smokes a little bit at the start but it goes away after a minute. Might be carburetor. I'm about to perform dry and wet compression test and just ordered leak down tester to investigate the problem. Do you have any advice as where to look? I'm thinking that maybe one of the valve seals is leaking badly and maybe instead getting inside the cylinder it gets directly into the exhaust and thats why I don't get any smoke. Not sure how to argue with the mechanic which obviously is not anxious to investigate the problem. Thanks in advance.