Seems like it'd be easy to use the rear factory bags instead of spending money on a couple new bags. they wouldn't fill up all the way of course... just a thought.
Printable View
Yes, sold my rear bags in 12
I'd be a little cautious with adding too much weight on top of the playpen seating. I found a support beam cracked underneath it - running 800 plus a short stocky guy up front and bouncing over waves didn't help.
We have a lot of this information outlined in our Resources section (albeit it can be somewhat difficult to find).
The end results, after doing this a few thousand times, is that aerator vs. impeller comes down the specific scenario. There are just too many variables, like budget, target performance, system configuration, etc. that come into play to make a single blanket statement about which is "best". We try to provide as much information as possible so people can make an informed decision about what is best for their application.
I know I'm a little late to the party, but I just wanted to provide some information that is specific to Moombas based on their factory ballast system:
1. A vented loop alone will not solve passive filling issues if you use the factory scupper thru-hull. You need to also remove the "scoop" portion of that fitting to prevent water from being driven into the intake when the boat is running through the water. Once that's done, a vented loop on the center locker will solve any passive filling/draining issues. For the rear bags, you only need to use check valves, as passive filling is not a symptom when bags are installed above the floor.
2. It's really not possible to link multiple bags together with aerator pumps and expect them to work correctly. Plan on having a dedicated fill/drain pump for each location to ensure everything works correctly.
Like Berg said, with a properly designed and installed system, you'll have just as much reliability out of aerator pumps as you would out of reversible pumps, it just takes a little more work to get there.
Thanks for the followup. Good to hear considering the pile of WM stuff that's sitting in my garage from the black friday sale! Spencer and I went over everything and he said the same as you.
Hope to see you guys sometime on LBC! I'll be there for a week this summer.
Yes, definitely need to connect on the water this year so we can see the finished product.
Well, we dug into the ballast upgrade this weekend and I can now see why there's all the talk about reversible systems being easier than aerators.
I decided to forego using the OEM scupper intake for my new aerator pumps and went with 3 dedicated 1" thru-hulls for each of my new pumps. I am capping the OEM scupper intake and will reserve that for down the road when I will likely add a 4th pump that's a reversible to use for filling misc bags...
Trying to remove the scupper or trying to grind off the scupper fins was too much work. so I didn't go that route.
So I had to fit a thru hull, ball valve, and the pump itself for each of the 3 new pumps. Everything seemed pretty straightforward until I realized that not only did the stack of components need to fit in the bilge but I also needed clearance for the lever on the ball valves to be able to work AND I also needed to be able to spin on the pump without the output port hitting anything as I spun it on.
I ended up having to get pretty creative. One intake goes straight up. Another has an elbow and the pump is mounted horizontal. The last one ended up mounted at a 45 degree angle after the thru-hull. But I think it's going to work okay. Another thing we did was cut off a couple inches of the handles of the ball valves. That way we could mount the valves with the handles pointing either towards or away from the pump. it also gave us the flexibility to mount the valves so the handles rotated down to the floor if needed. We just took the cutoff wheel to the handles and it's amazing how much flexibility is added when those handles are trimmed down to size.
Here you can see a pic of the starboard side of the bilge. the empty ball valve is the factory ballast scupper that I won't be using at this time. The horizontal pump has the output cocked to about 1 or 2 o'clock because that's how we had to orient it to clear the vdrive.
https://lh3.googleusercontent.com/-h...208_183412.jpg
This is the starboard side. It seemed to fit best a little behind the fresh water intake for the engine with a 45 degree elbow between the thru-hull and the ball valve. My Flush Pro takes up a lot of the space forward of the fresh water intake.
https://lh4.googleusercontent.com/-Z...208_183248.jpg
https://lh5.googleusercontent.com/-t...208_200709.jpg
An attempt at a view of it all:
https://lh3.googleusercontent.com/-H...208_183435.jpg
Packing nut access? Once it starts to go your in that space a lot.
Another thing we did is used a step drill bit to cut the holes in the hull for the thru-hull fittings. I have to say that it worked great. The largest step was the 1 3/8 size that I needed, so it was easy to just drill until the whole bit was through.
Likewise, I'll be reusing the brackets that were used by the factory to hang the drain pumps. I just had to drill out the hole in the brackets to fit the thicker pumps. Again, the step bit was perfect for making the hole bigger.
http://www.toolfix.com.au/images/C/stepped%20drills.jpg