Is there a crankcase vent filter on yanmar diesel?

Yes, most Yanmar diesel engines have a crankcase vent filter. The crankcase vent filter is typically a small, cylindrical filter located on the top of the engine block, near the oil filler cap. The crankcase vent filter helps to remove harmful contaminants from the engine oil, such as dirt, dust, and moisture. It also helps to prevent the engine oil from becoming aerated, which can cause damage to the engine.

The crankcase vent filter should be replaced regularly, according to the manufacturer's recommendations. A clogged or dirty crankcase vent filter can cause the engine to run rough, stall, or even fail to start. It can also lead to premature wear and tear on the engine.

If you are not sure if your Yanmar diesel engine has a crankcase vent filter, you can check the engine's owner's manual or consult with a qualified mechanic.