I have a Yanmar 4JH4AE with 740 hours on it. I bought the boat with 520 hours on it. Max rpm is 3000, I had been cruising at 2000 but I keep hearing faster is better so I began cruising at 2600. After several hours at 2600 I can smell a little burning oil inside the boat. I checked the engine and found a little oil on the outside of the air intake manifold, along
the bottom edge of the cover plate. I can also smell a little burning oil in the exhaust from time to time but I can't see any smoke. There is no noticeable consumption on the dip stick. Is this engine blow by ? Is this normal ?
the bottom edge of the cover plate. I can also smell a little burning oil in the exhaust from time to time but I can't see any smoke. There is no noticeable consumption on the dip stick. Is this engine blow by ? Is this normal ?