Aeolus
Well-known member
Reading the thread on Speedseal instructions triggered a question: What is the advantage of a Speedseal compared with keeping the existing pump cover but replacing the screws with threaded studs and wing nuts?
Speedseal vs DIY alternative
- Thread starter Aeolus
- Start date
lynall
Active member
Isnt there a nylon wear plate?
I changed my pump screws to stainless cap head ones for ease of removal
I changed my pump screws to stainless cap head ones for ease of removal
Stork_III
Well-known member
+forSpeedseal - O ring seal instead of paper gasket. Slotted holes (2) for quick location, and meaning 2 screws only need loosening, 2 removed. It looks nice.
+ for original - cheaper.
+ for original - cheaper.
pissativlypossed
New member
nigelmercier
RIP
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I'm sure someone with metalwork skills could knock one up. Unfortunately I was in the "A" stream, so I did Latin 
ghostlymoron
Well-known member
I had decided to fit one but unfortunately they don't do one for my engine. I had considered knurled thumbscrews but I don't think they would be tight enough to compress the paper gasket. Cap heads would be a good idea as they are more or less 'captive' to the Allen key - what a good idea. PS my water pump is in a most inaccessible position and I would hate to have to take it apart at sea.
Nigel, I too had to learn Latin at school and have had to pick up practical skills later in life. O me miserum.
Nigel, I too had to learn Latin at school and have had to pick up practical skills later in life. O me miserum.
Daydream believer
Well-known member
I have problems getting the paper gasket to seal properly & it constantly leaks. As a result I have to faf with gasket compound
i imagine that as the speedseal has a neoprene ring bedded into the cover plate it should give a better seal. Could be a problem if the seal kept falling out when removed though
i imagine that as the speedseal has a neoprene ring bedded into the cover plate it should give a better seal. Could be a problem if the seal kept falling out when removed though
Easticks28
Well-known member
I use a smear of marine grease, which temporarily sticks the gasket to the face plate. Saves a lot of faffage!
john_morris_uk
Well-known member
I stick the 'O' ring of the Speedseal in place with some grease! Same difference?
Pladdatoo
Member
ghostlymoron
Well-known member
oldbilbo
...
Yes, they do. I took one of the original chewed-up brass slothead thingys into my tame Avon Stainless s/s supplier, outlined what I wanted, and a minute later was in possession of a full set of the 'dogs bolleaux'. Much easier to retro-fit, 'cos of the knurled end, using fingertips, then the little Allen Key tweaks them up firm. That A/key and some spares now live in a dedicated clip-lidded small plastic box, together with 2 spare impellers, some grease, some gaskets, and the right Jabsco part number.
rob2
Active member
It wouldn't be too difficult for even a rank amateur such as myself to turn up a replacement cover plate for the pump, incorporating the features of the original SpeedSeal. Just a very slight relief on the working face to match the original paper gasket thickness and a groove to hold an o-ring, selected to allow it to fully compress. The two drilled holes and two slotted holes can be drilled on a small drill press and slotted by hand if you don't have access to a mill.
Perhaps more interesting, or prone to errors if you like, would be to copy the design features of the later version with the separate wear plate. I suppose if you cut too much relief into the plate, some form of shim could be added to take up the slack, positioned under the wear plate. Bearing in mind the slight distortion visible in my pump's cover plate, I'm guessing the clearance isn't too critical sdo long as it doesn't bind or create a significant leak path.
Rob.
Perhaps more interesting, or prone to errors if you like, would be to copy the design features of the later version with the separate wear plate. I suppose if you cut too much relief into the plate, some form of shim could be added to take up the slack, positioned under the wear plate. Bearing in mind the slight distortion visible in my pump's cover plate, I'm guessing the clearance isn't too critical sdo long as it doesn't bind or create a significant leak path.
Rob.
grafozz
Member
I have yet to cut them , but I have outlined the shape of the original Volvo penta water pump plates and
will , when time allows , cut them from 3mm stainless plate .
I think this will stop the wear on the end plate which often necessitates their replacement , due to theVolvo/Johnson "soft " brass end plate .
I have reversed the plates already , so extending their life span .
will , when time allows , cut them from 3mm stainless plate .
I think this will stop the wear on the end plate which often necessitates their replacement , due to theVolvo/Johnson "soft " brass end plate .
I have reversed the plates already , so extending their life span .
PCUK
Well-known member
I keep a spare pump on board as I find it much quicker and easier to change the pump than just the impeller in the pump. Depends on your pump access as this will affect how easy impeller replacement is.
scottie
Well-known member
I am sure that the speed seal plate is a lot thicker than the original ones
Room for oring groove and less distortion
I doubt that the original cover plate would suit slotting
Room for oring groove and less distortion
I doubt that the original cover plate would suit slotting
nigelmercier
RIP
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- Live in Kent, boat in Canary Islands
It is, about 5mm I think.
TonyBuckley
New member
My Lister Petter LPW3 has the water pump right against a partial bulkhead.
I am not carrying a spare impeller which is stupid and irresponsible yet I have not been able to find a spare for what is fitted. Numerous posts suggest that the entire pump needs to be replaced in case of failure which I just do not believe. It was serviced in a yard last year so I need to find out what records they kept on how they replaced the bits.
So the plan is to cut through wood for decent access and measure up the sizings and work out how to easily, meaning quickly, replace the impeller. I am sure there is something generic out there. Just need the time to investigate!
I am not carrying a spare impeller which is stupid and irresponsible yet I have not been able to find a spare for what is fitted. Numerous posts suggest that the entire pump needs to be replaced in case of failure which I just do not believe. It was serviced in a yard last year so I need to find out what records they kept on how they replaced the bits.
So the plan is to cut through wood for decent access and measure up the sizings and work out how to easily, meaning quickly, replace the impeller. I am sure there is something generic out there. Just need the time to investigate!
snooks
Active member
The new speed seal has a nylon bearing in the cover. I ran mine for five minutes with the raw water inlet switched off to see if their claims stood up. Worked a charm, not even warm at the end of it.
Not too sure I would copy speedseal's design, easier (legally and morally better too) to put my hand in my pocket. Also less expensive than if my mash up failed without noticing me a problem.
Not too sure I would copy speedseal's design, easier (legally and morally better too) to put my hand in my pocket. Also less expensive than if my mash up failed without noticing me a problem.
Hadenough
Well-known member
Why don't you just ask them??
