Servicing your Oberdorfer 202M15

My Oberdorfer pump had started to drip seawater and I knew it was time to service the unit. There are several good resources for doing this, easily found with a google search, so I won't go into much detail here. Suffice to say if you have one of these they are easily serviceable for a fraction of the cost of a new unit. Watch yours, and when it starts to drip water, one of the two seals, the water seal, has begun to fade.

You can purchase all the parts you need at your favorite marine supply store. For those of us around Western Washington, Fisheries Supply is a reliable and locally owned resource. I needed to purchase the repair kit, as well as a new shaft. When you pull the pump off the engine, and remove the shaft, you need to look to see if it is scored and grooved. My pump had a very slightly grooved shaft, and I decided to replace it with a new one. They cost about $55 her in 2019. In the repair kit you get the two seals, and the carbon bushing, along with a new impeller and the O-ring.

Getting the old bushing out and the new one is easily done with a good size C clamp held vertically in a table vise. Use a socket of the right size, only slight smaller than the diameter of the bushing, and press it out using the C clamp. The new one goes in nicely using a washer as a barrier between the clamp and bushing.

The two seals go in easily, and evidently must be placed in so the lettering on their side faces internal to the pump, though I'm not sure why.

There is more to this, but like I said, do a google search and you'll find plenty. This is just a note to those who have these pumps that they need servicing and are easy to do.