Yanmar 1GM, 1GM10 water pump seals replacement 

Great tutorial, just worth mentioning though that there are two kinds of water seal that could potentially be needed depending on the age of the engine - 124240-91450 or 128170-42120. The first part number is a single lip seal, the latter double lip. Functionally the same but big difference in how easy they are to fit!

Fantastic demo. I just did the replacement and it worked like a charm. The only difference is I was scared to clean the volute with a screwdriver as you did. I used a brass rod instead. Thank you for sharing.

Thank you. I just changed mine, and your video was very helpful :-)

Great video! I was wondering if you can remove the pump without pumping out the oil out of the engine. I thought it was all oil behind the inner gasket.

Check the pump shaft for a wear grove from the lip on the seal. If your thumb nail catches as you slide it across the SS shaft it replace the shaft..

Thank you. This video really gave me the courage I needed to try this out for myself. I have never serviced anything of this kind before, so it is much appreciated to have someone showing how it is done. Regarding the lubrication of the pump: which kind of oil do you use. I only have some PFTE based oil, will that work?

Great video, thanks for posting! I was wondering if you might have the part numbers for the two oil seals? Having trouble identifying them. Thanks in advance!

Thanks! Good

Hi, where did you get all the replacement parts for this yanmar engine. I'm trying to find a cheaper place to get all that than West Marine

I have to do this, Should The engine be empty for oil before pulling this off?

Hi I have removed the old seals. But for the life of me I can't get the new smaller one in. Despite watching your video. It does have a small spring type washer in should that be there? Regards Barry

Do you have any extra tips on getting the water seal in place? I think the hole looks really small and the seal feels like it is made of semi hard plastic, rather than rubber.

Hi, I see a Cam mentioned on the schematic; my pump does not have this, whats the significance.

would have been good if you had shown clearly which direction the seals go in as they can go either way ,, quite important ,, the rest is easy !!

Hi how did you actually remove the old seals?

The seals don’t really pop out. If they are old they fall apart.

How to remove the old seal was a nightmare and unfortunately it is not shown on the video. Conclusion dont try this at home ...just don't do it.

just use Avasva Solutions :)))