Re: Johnson 60 Power Problem
Yes, Gnat.<br /><br />That helps a lot.<br /><br />Your engine is a 2000 model, I think it is a 3 cylinder loop charged 2 stroke.<br /><br />I don't think OMC marketed any Johnson 4 strokes in 2000. The Suzuki-built 4 strokes were labeled as Evinrudes in the USA at that time. I assume the same for Oz.<br /><br />I am concerned that an engine that new needed to be rebuilt. 2000 was the worst ever year for quality control by OMC and a rebuild may have only fixed the symptoms, not the cause, of a major failure.<br /><br />The symptoms you describe are of a cylinder "going away". That engine will start, idle smoothly and sound great under no load with only 2 cylinders making power.<br /><br />1. With the engine idling, disable each spark plug, in turn. You may carefully pull the wire off with insulated pliers or rubber gloves, or you may just short circuit the plug with a screwdriver. Any cylinder that does NOT cause the idle speed to drop when you do this is a dead cylinder.<br /><br />2. A dead cylinder with a good spark has compression or fuel problems. Squirt a bit of fuel mix into the carb for that cylinder. If idle speed jumps up, you have a carb problem.<br /><br />3. Do a compression test. On a newly rebuilt engine each cylinder should compress over 100psi and all three should be within 10psi of each other.<br /><br />4. Try to get the history of the engine. Why was it rebuilt? Was it covered by warranty? Do you have a warranty on the rebuild?<br /><br />Let us know what you find and we can go from there.
