Carter mechanical fuel pump seals |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11041 |
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Posted: April-22-2017 at 12:56pm |
Since in another thread on stringers there's a bit of disagreement on fuel pumps and the vent hose routing on them, I figured I'd take apart a Carter pump and show the upper seal where the operating arm connects to the diaphragm and seal assembly.
Here are a couple of pictures of the upper seal and sealing surface on a carter single diaphragm marine pump off of a 351w so you can see the upper seal and the sealing surface it seats on. In the first one, the red pointer is pointing at the sealing surface which is pretty cruddy and in the second one the pointer is pointing at the flat rubber coated metal seal. It's a little hard to see, but the rubber is degraded in a few spots on the seal The big spring keeps things seated , but like everything else wear and tear takes it's toll and this one looks "not perfect but it's still good" You can draw your own conclusions about whether it can leak gas from a bad diaphragm past this seal into the crankcase. I'll agree with Gary S on his answer in the other thread. |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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I took mine apart awhile back since it was getting up there and I was concerned that it had no overflow line so therefor not marine? . Once inside I found the top seal and just added a connection for the line.
It was pretty nasty looking inside but cleaned up well |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11041 |
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Pump's all back together and working again. This one lives in my plow truck these days
It just got a cleaning and check of the diaphragm, mostly took it apart to see that upper seal area and take a couple of pictures. It should be good for another couple thousand hours which in the plow truck probably translates to forever or maybe the diaphragm will crap out in a few hrs. Who knows |
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