Understanding YANMAR engine model codes Most engine model designations are on an engine data plate, on the front or the top of the engine. Some older engines have the data plate on the adapter plate between the engine and the gearbox . Here are some examples of engine model codes and their meanings: YSE8 Y= horizontal cylinder, lying down. SE = engine model type or block type.
Long hoses to and from other equipment are not Yanmar parts according to the Yanmar parts catalogues. The bulk 1/4" certified marine fuel hoses are a little snug on the existing fittings but can be stretched with a hair dryer. Lubricate all fuel hoses with Superlube to get them on and off in the future.
A Yanmar engine school tech told us to spray some white paint on the bottom of the tube to be able to see the fluid level more easily. My Tranny takes 30W engine oil but your's might be different. There should be a manufacturer's ID plate on the Trans with info about whether to use engine oil or transmission fluid.
Anyone have step-by-step instructions for replacing the seals in a Yanmar 2GM20f water pump. Mine has begun to leak a bit and I assume it needs new seals. I have the diagram for the water pump, but am looking for instructions for how to remove/replace the seals.
I will just say that, on the Yanmar GM series engine, the heavy overhanging transmission end requires the heavier engine mounts (both 100#) and the other end requires the lighter engine mounts (both 75#).
During the past 5 years I've owned two new boats an H356 with a 3GM Yanmar and an H44 with a 4JH Yanmar. Each engine experienced the same coolant leak during the winter storage. In the fall, I would perform all of the routine winterization on the engine and ensure that the coolant level in the...