New Boat Purchase

[freeheel4life]

They are rated at 20A. Ive never put an inductive amp clamp on them but Id suspect you will find inrush current is high at firstand then it drops back down a bit....but still. Thats why Skiers went to the 230A alternator and Tige still has the 95A.

Cant remember times but one of the cool things Autowake does(thank you IDBoating ) is it has line sensors on the vents so pumps know when to shut off. It baffles new owners who are used to running until vents pump put water. Murphy/Supra also worked it out so timers auto adjust.

[bsreid]

Reversible pumps have there downsides. If you run them dry you’ll fry the impeller and it seems like they never last very long. My buddy has replaced 4 already.

If you go off the GPH the standard reversible pump is actually slower than the standard tsunami pump.

[chpthril]

If you go off the GPH the standard reversible pump is actually slower than the standard tsunami pump.

GPH is a standardized unit of measurement, so for example, a 500 GPH reversible is just as fast as a 500 GPH aerator. Now, here where it gets fun! Aerators are effected by head pressure, so their effective flow rate, the rate once the water actually gets to its destination, is reduced from the rated GPH flow rate at the outlet. This can be 20% - 25%. So that 500 GPH aerator can now be a 400 GPH at the ballast sac, while the impeller pumps stays nearly at its original 500 GPH rate.

If oriented properly, an impeller pump should last quite a long time. Last month, I replaced 3 OEM jabsco in an 07 mastercraft. 2 where oriented upside down, and should have been replaced 2 seasons ago though.

[IDBoating]

A few clarifications:

* Our WakeTouch Hose Sensors are not inherently part of AutoWake. AutoWake itself is now owned by Skier's Choice (Moomba/Supra), but our Hose Sensors are available for sale to anyone because they are our product. We supply them to Skier's Choice for use with AutoWake but we also provide them to other customers.

* Aerator pumps (aka livewell, centrifugal, etc.) are always more efficient than flexible vane impeller pumps. Flexible vane pumps operate by "squishing" the vanes of the impeller as it rotates. The force and frictional losses involved are severe. Trust me, we have intensively studied all sorts of pump types. FVIP's have a lot of advantages but you pay for those advantages with increased current consumption, noise, and the need to service the impeller. There's no single "best pump", you have to consider what you're trying to do.

* Because of their current consumption, FVIP's do have large current ratings. But as freeheel4life noted, there's a big startup inrush peak followed by a lower continuous current flow. The current marked on the pump motor generally indicates the recommended fuse and wiring sizes. Thus a pump motor marked "20A" usually means they want you to use a 20A fuse or circuit breaker. But I'd expect the steady-state current draw to be more like 7-10A. Inrush to continuous current is generally at least 2:1 or 3:1, sometimes more. Always consult the pump's documentation for their specific fuse and wire recommendations.

* Yes, the number of ballast pumps on boats - and their current consumption - is getting ridiculous. It's true that Skier's Choice has gone to a 230A alternator, and I know of at least one engine manufacturer that has a configuration to mount a SECOND alternator (nearly 500 amps!). (EDIT: I believe Mastercraft has a ballast system that draws so much current that the engine not only has to be running, it has to be above some RPM threshold to generate enough current from its alternator.) It's not just ballast pumps, either... everyone is excited about thrusters but those suckers take a couple hundred amps all by themselves. This is not a viable long term situation.

Rest assured we have a solution for this problem. It's not easy. It's been five years in development. But finally we're close to being done, and should be shipping as from-the-factory options on the best boats next year! {grin}

[freeheel4life]

The Johnson Talulah pumps that MC uses are pretty awesome. Some models are running 6-8 pumps. You will get a prompt at screen that asks you to up RPMs to 1500 RPM while filling. Ilmor hasn't stepped up their alternator game to a high output though. MC is just running larger batteries(Group 31s) to help.

I dont think its a secret now but Tige upped their ballast from Tsunami 1200 GPH to the Sumo pumps which I believe are 4200 GPH. Ive used the sumo as a throwover pump and it fills at 1000lb bag on the floor insanely fast and of course pumps it out just as quick.

[IDBoating]

4200 GPH?!? That must be some sort of custom pump. The off-the-shelf Sumos are in the 1500 GPH range. On my personal boat I've been upgrading to the Shurflow Livewell 2000 and it flows more water than any other one inch aerator I've seen. What diameter are this Sumo's fittings? What size hose?

[chpthril]

4200 GPH?!? That must be some sort of custom pump. The off-the-shelf Sumos are in the 1500 GPH range. On my personal boat I've been upgrading to the Shurflow Livewell 2000 and it flows more water than any other one inch aerator I've seen. What diameter are this Sumo's fittings? What size hose?

The shurflow 2k is a big pump.

1" inlet or outlet?

[IDBoating]

The shurflow 2k is a big pump. 1" inlet or outlet?

The Shurflow Livewell 2000 I have in my boat (fill pump on port aft bag) has 1in or 1-1/8in fittings (depending upon how you define the measurement). Standard 1in ballast hose fits it after being softened up a bit with a heat gun.

It's rated for 2000 GPH and moves a LOT of water. It is noticeably higher volume than the Rule 209B 1600 GPH pumps it is replacing. The difference is enough that I have to allow for it when I'm filling because it will get ahead of the other pumps very quickly. Filling port also takes a lot less time than draining.

I should repeat that the single biggest restriction in my system is the tiny little FatSac fittings. To help with that I use 1in Y's and connect to TWO FatSac ports. Either of the Rule 1600 GPH or the Shurflow 2000 GPH pump are a waste of effort if you're trying to use them with a single FatSac fitting... the restriction is too great and centrifugal pumps are not positive displacement, so the backpressure just kills the flow.

[UNSTUCK]

4200 GPH?!? That must be some sort of custom pump. The off-the-shelf Sumos are in the 1500 GPH range. On my personal boat I've been upgrading to the Shurflow Livewell 2000 and it flows more water than any other one inch aerator I've seen. What diameter are this Sumo's fittings? What size hose?

This pump:

https://www.wakemakers.com/straight-...last-pump.html

I keep one on my boat when we want to use a bag in the bow. Also, because it's so fast, we keep it on the boat incase we ever get in a situation where we need to pump a lot of water out of the boat.

[Bamer]

This pump:

https://www.wakemakers.com/straight-...last-pump.html

I keep one on my boat when we want to use a bag in the bow. Also, because it's so fast, we keep it on the boat incase we ever get in a situation where we need to pump a lot of water out of the boat.

Something is a miss here. They are implying that water weighs 200/70=2.3lbs/gal and it doesn’t. Water weighs about 8lbs/gal.

Or even better, they are implying there’s 60hours in 1 minute. Lol...4250/70 = 60


I converted 200lbs/min to GPH using 8lbs per gallon and I get 1500GPH.

My thought is the 4250 was a typo and someone f’ed up the conversions......




Sent from my iPhone using Tapatalk

[chpthril]

The bad math seems to come from the manufacturer. 4250 gph = 70 gpm = 587# in 60 seconds.

[UNSTUCK]

Yes, there is some bad math there. Good catch.

Here's what I know. I can fill an "1100 pound" bag in a couple minutes. Never timed it, but I'm sure it's less than 5 minutes. But we'll say 5. Hopefully my math is a little better.

1100 / 8.3 = 132.5 gallons

132.5 / 5 = 26.5 gallons per minute

26.5 * 8.3 = 220 pounds per minute.

If I had guess, I'd say Sumo did testing at 12 volts. Our boats typically run higher than 12 volts. More like 13.5 to 14.5. This will greatly increase pump speed and fill-drain times. This is something you must account for before you start cussing at "slow" pumps, or what not.

All that being said, bottom line is that it's a great pump. I can run it off my 12v acc plug just fine. If you want it, I believe you are stuck using sumo bags though as the fittings are more like 1 1/4". Quite big.