Thread: Rubber Prop Bung
06-20-2010, 09:11 AM #1
Rubber Prop Bung
So I stripped my pump yesterday and installed the new Solas prop
I did find the "invisible" rubber bung which lives at the end of the splined shaft and removed it from my stock prop
I tried to install it into the same place in the Solas but it seemed way too big (I know the splined area has to be the same in both props). The female end of a 3/8 extension bar is pretty much the perfect size to press this back in but it just wouldnt go
Upon closer inspection the stock prop appears to have a dedicated space for this rubber part (a small area at the end that isnt splined and is shaped to allow the rubber bung to "seat" there correctly) whereas the Solas does not
The rubber bung is tapered but I`m convinced from my expierence that it wont fit the Solas (particulary as there is no place for it to "seat" in correctly like the stocker) unless it is cut down
Can anyone advise?
Will it fit?
Does it require cutting down?
Is it required at all?
Thanks in advance
06-20-2010, 10:34 AM #2
You want a snug fit but not so large a plug that it tears or destructs in shoving it in with that 3/8 extension (good idea btw). You may have to trim it down a little...but if it slides in too easily then it's not going to seal at end and you'll end up like I did when i left the plug out..bearings waterlogged and rusted after 15hrs. I lost my plug so I had to make one out of rubber sheeting... it's not that big a deal to profile ..just get a snug fit. If it's too thick then the shaft will transfer the loading back and you don't want that either. Use your judgment and trim...your intuition is good.
06-20-2010, 10:47 AM #3
06-20-2010, 05:08 PM #4
I pulled the pump back off and fitted the rubber plug
For anyone else doing this, I measued the shaft at 20mm and the rubber bung at 22mm
I also found something better than the 3/8 extension bar for pressing the rubber bung evenly into place, the splined impellor removal tool! (pretty obvious really) I did have to use the extension bar to drive it the last few millimetres as the splined tool wasnt long enough
When it was in place it was a real good fit, I would be pretty sure that its watertight which has to be a good thing. I have also read somewhere that the pump runs quieter with the bung installed
Once again, thanks for the help!
06-20-2010, 05:58 PM #5
06-21-2010, 06:30 PM #6
I've cut and pasted this info in my Aquatrax file, good job! as my boss likes togive us. Only problem is my boss takes all the good jobs away with one ut-oh!
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