750 sac in a 210 questions???

[Beachrat]

I am looking to piggyback a 750lb sac on top of the rear tank in my 08 Sante 210 & had a few questions.

1. Any problems caused with the battery switches in the port side locker?

2. Do I have to reinforce the engine divider?

3. Any problems with siphoning while surfing?

4. What is the best way to avoid collapsing my hard tank?

5. If I happen to bend the sending unit & the tank/sac are full, will they still drain or should I have a portable pump as a back up?

[Sac Surfer]

1 - No here is an image This is a 750 on the stock tank Port side.

2- No, not unless your going to remove the factory tank and put in 1100's. Then will need an ext piece.

3- No, I haven't had any issues. If you do there are check vavles or you can run hose to the other side. I would just use the same side and check it when 1 riders set is over, press fill if needed.

4- I have heard the "Collapsing hard tank bending sender units when draining, but used my piggy back 750 kit from wakemakers and didn't have any issues.

5- I would say yes, and the pump isn't connected to the sending unit, it's just got the gauge/display.


Get the 750 in there and get surfing!

[ES]

I agree with everything Sac Surfer mentioned. I am keeping an eye on the engine partition though - the sac pretty much fills up the whole locker area and I am sure puts a lot of pressure on that partition. Fortunately the boat will be listed on that same side, so at least gravity helps to pull the weight away, but still, something to keep your eye on.
One additional thought: the 750 sac puts a lot of extra weight in that corner (which is great for the wake)...I may need to add more weight upfront, since I don't think the belly ballast is enough anymore to keep the wake longer...

[HS]

4. If by collapse you mean due to vacuum pressure when emptying the ballast, I used the vent port nearest the fill port as a means to maintain air flow through the sac during the empty cycle. That, plus keeping an eye on what is happening back there.

I am considering a layer of plywood to support the sac on top of the tank as a means to protect the tank and senders due to weight of the sac, but haven't heard too many problems occurring from the sac weight. At the boat show I saw a big guy standing in the locker on an empty tank, so maybe a concentrated "point" load of 250 might be a greater force than a distributed 750 load. . .time will tell.

[Beachrat]

Thanks for the input guys. Yes, I was worried about collapsing the hard tanks if the sac collapses on itself and can no longer vent the hard tank it would create vacuum pressure causing problems with the tank & sending unit. I know that others have used cross drilled pvc pipe inside the sacs but using the vent port nearest the fill port should work good like HS mentioned.

I will also need to add some ballast to thes front to balance the weight it the boat & extend the pocket. I talked to the guys from wakemakers & they recommended the bow sac over the arrow sac for the 210. They have a 580lb center locker sac that would fit but I don't know how well it would drain back into the center tank.

[HS]

Do you have the model number on the 580?

[Beachrat]

It's a W705, 60LX26WX10H

[msbowhunter]

I cut a piece of a noodle and duct taped it over the sending unit for protection. I removed the carpeted piece that covers the hard tanks which allows the bag to kinda spill over the sides and doesnt even come close to the battery selector switch. I think that as long as the hard tank is filled with water it can support whatever u can put on it. My sack leans to the port side and doesnt seem to put any pressure on the engine divider. So far so good on mine.

[Beachrat]

Thanks for the help...I think I'll remove the carpet piece too. I placed an order for the 750 sac yesterday from wakemakers.

[SuperSquirt]

I've been using this setup in my 210 for about 5 seasons now, and I haven't had any major issues. I plumbed in 400s over the stock tanks and not the 750s (i can't imagine how they would fiit cause the 400s swell up the entire locker). As far as your original questions, here's my take...

1. No Problems
2. Never have, never will
3. I do have problems with the 400s spilling out the side of boat when turning sometimes
4. Not sure what the best way to stop this is. It happened to my port side and the dealer replaced the sender, it was bent about 35 degrees and the rubber float never went down all the way to tell my gauge it way empty
5. Don't worry, they will still drain as normal, but your gauge will be off

The only other issue I have is on my starboard side. The sac will fill up and push the blower hose out of the exit vent hole. No biggie, but annoying

As far as weight distribution, I find that stock ballast plus 800 in the back and center ballast plus tube sac in the center well will give you a super steep wake with some porpoising depending on water conditions. I hose pump another sac in the bow to even things out and makes it much smoother to drive.

[TxJole]

When my tank collapsed bending my sending unit we were running while emptying. I think this increased the suction. To fix the problem I am installing a Watts N36 vacuum breaker next weekend. I'll keep you posted.

[Beachrat]

I installed the 750lb port locker sac & arrow sac in the bow yesterday. The rear install went well but struggled for a while with the arrow sac, it should have been easy but the vent hose on the centre tank was wedged/sandwiched in the footwell area & had 3 zip ties that weren't accessible to cut with snips & I had to remove the floor panel. Even after the zip ties were removed the vent hose was wedged so tight I had to fight with it for a while to get it free, after that the rest of the install went well.

After the install was complete I filled the sacs & it was a huge improvement over the stock ballast. When I emptied the sacks I tied a bungee cord around the port locker sac to prevent collapsing the bag & watched the drain cycle very closely. When everything was drained I noticed the port ballast tank was was far below empty all the way to the left, different that the other ballast guages that read empty. The port guage wasn't working anymore so I thought I might have bent the sending unit but soon realized that when the 750 sac filled it ripped the sending unit wires out of the connection clip & that's why I had no reading on the guage. Now I need to figure out how I'm going to fix the wire connection where they pulled out from.

[HS]

when the 750 sac filled it ripped the sending unit wires out of the connection clip & that's why I had no reading on the guage. Now I need to figure out how I'm going to fix the wire connection where they pulled out from.

Something on the sac snagged the wires? was the carpet board on top of the tank removed?

[Beachrat]

Yes, I removed the carpet board from the port locker. Once I get it fixed I will try to tuck away the wires better or pull the sac forward towards the bow. I also noticed the sac doesn't drain completely because of the riser piece from the hard tank...I think I'm going to make it shorter which should help drain more water out of the bag.

[HS]

I used a hole saw to cut through the vertical return piece on the carpet board for the stub from the hard tank to the sac. Maybe duct tape the harness down to the top of the tank will keep it from getting snagged?

From the way the fill port is set at the base of the rear wall on the sac, there is about an inch or so of water that doesn't drain out on the empty cycle, plus the forward end of the sac runs down into the storage locker leaving a pocket of water traped there unless I lift the bag up to drain it. Sure is nice to have it set up, though.