Ian Pace
New Member
- Oct 5, 2021
- 5
- Boat Info
- Searay Sundancer 240 (2000)
- Engines
- Mercruiser 5.0 V8 EFI
Hi All,
I think this is my first post here and it unfortunately has to be about the head….
I have a 2000 Sandancer 240 which came from factory with a Vacuflush system. I have searched all over the forum and internet but can’t seem to find anyone with my same issue…..
The Vacuflush system does not have an external holding tank and only has an overboard discharge, in the head i only have a key switch with on/off as per below:
I have replaced all 4 duckbill valves, bellows and o ring kit, however I have a VERY strange issue:
With Seacock Open:
Flushes, builds vacume in around 30 seconds and shuts off. Works perfecrtly.
With Seacock Closed:
Sometimes wont have much vaccume and on occasions it does. When It does, pump shuts off after 3-5 mins. Other times it keeps running. If during this process I open the seacock, it will build up the vacume within a few seconds.
It’s totally confusing…. As I expect it to lose vaccume and not build up pressure when the seacock is open and not the other way round!
It seems that it needs some kind of vent for it to build vaccume…. Which is strange as it wasn’t designed that way.
Altough I am not in the US, we still have the 3 mile regulation, so I don’t wish to have the seacock open unless I need to discharge when out at sea….. don’t fancy swimming in our own poop anyway
Anyone ever experienced anything similar?
I think this is my first post here and it unfortunately has to be about the head….
I have a 2000 Sandancer 240 which came from factory with a Vacuflush system. I have searched all over the forum and internet but can’t seem to find anyone with my same issue…..
The Vacuflush system does not have an external holding tank and only has an overboard discharge, in the head i only have a key switch with on/off as per below:
I have replaced all 4 duckbill valves, bellows and o ring kit, however I have a VERY strange issue:
With Seacock Open:
Flushes, builds vacume in around 30 seconds and shuts off. Works perfecrtly.
With Seacock Closed:
Sometimes wont have much vaccume and on occasions it does. When It does, pump shuts off after 3-5 mins. Other times it keeps running. If during this process I open the seacock, it will build up the vacume within a few seconds.
It’s totally confusing…. As I expect it to lose vaccume and not build up pressure when the seacock is open and not the other way round!
It seems that it needs some kind of vent for it to build vaccume…. Which is strange as it wasn’t designed that way.
Altough I am not in the US, we still have the 3 mile regulation, so I don’t wish to have the seacock open unless I need to discharge when out at sea….. don’t fancy swimming in our own poop anyway
Anyone ever experienced anything similar?