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Old 31 May 2015, 09:34   #1
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Inflatable floor - planing question

I have a 10'2" AVON Rover circa 1996 in great condition, bought used, with an Evinrude 8hp 2-stroke outboard also in excellent condition. 8hp is the max rating for this boat with inflatable floor. I'm finding it difficult to get on plane, sounds like the motor is sucking air, as if the boat isn't rigid enough to make water flow underneath correctly.

Does anyone have any experience with this or advise, tips, etc? I wonder if I'm putting enough air in the floor? If not, how do I gauge the psi when filling up these tubes? Is there a meter I can purchase? Thanks for any help!
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Old 31 May 2015, 09:46   #2
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Without a gauge it is unlikely you will reach the full pressure which can be quite a hard pump towards the last few psi/bar.

You can get an inline gauge which will show you the pressure as you inflate it.

Like this... Bravo Pressure Gauge | eBay

One or two up (as long as you're not too heavy) an 8hp should plane a small Rover.
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Old 31 May 2015, 12:21   #3
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Thanks for the info. What do you recommend about inflating in sunlight (I live in FL and it's summer time), so as not to cause heat expansion that would result in unintended "side effects"?
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Old 31 May 2015, 15:12   #4
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Thanks for the info. What do you recommend about inflating in sunlight (I live in FL and it's summer time), so as not to cause heat expansion that would result in unintended "side effects"?
Inflate the boat in the water in the midday sun, and you'll be fine. Just don't inflate it in a dark, air conditioned area then take it out in to the sun. Or inflate it at night then let it sit until the next day. 1 Celsius = 4 millibar of pressure change.
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Old 31 May 2015, 17:09   #5
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Floor pressure

You'll need to determine precisely what the recommended floor pressure is. It could be something silly like 12psi. An electric pump would make life a lot easier: 12 VOLT BRAVO INFLATABLE BOAT RIB DINGHY AIR PUMP AVON ZODIAC | eBay

But a footpump from Mercury will work too, and it has a gauge: Ron Hale Marine Ltd - Quicksilver Double Action Air Pump
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Old 31 May 2015, 18:46   #6
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Is there an electric pump by Bravo or another company that uses a cigarette lighter instead of pos/neg battery cables? I don't have a battery nearby in a handy location when inflating the boat
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Old 31 May 2015, 19:14   #7
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A cigarette lighter socket will catch fire or blow the fuse/car wiring if you plug in one of the high pressure pumps. They take way too much power. Extending your cables on the pump or making an extension you can clip onto would be the best way.
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Old 01 June 2015, 12:33   #8
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The Bravo 12 BST pump has a self contained battery that charges overnight from a 12v cigarette lighter socket. It also allows you to set the pressure required, for me on my 3D lightweight tender (2.9m) it takes about 6-10 minutes to inflate.
I set the dial to 3psi and inflate the air floor then the 3 tube compartments and as the correct pressure is reached the pump stops.
Then i set the dial to 9psi and inflate the air floor to its correct pressure then the pump stops. I have roberts halkey valves and simply hold the pipe with the correct adaptor in the valve and a bar on the adaptor pushes and opens the valve until the pump stops at the correct pressure, as i remove the pipe and the valve closes instantly with no pressure loss.
The pump also reverses and deflates the SIB.
The pump will inflate larger SIB's from a single charge as it is recommended up to 15 minutes of continuous use. It makes things a lot easier all round
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Old 01 June 2015, 13:06   #9
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The Bravo 12 BST pump has a self contained battery that charges overnight from a 12v cigarette lighter socket. It also allows you to set the pressure required, for me on my 3D lightweight tender (2.9m) it takes about 6-10 minutes to inflate.
I set the dial to 3psi and inflate the air floor then the 3 tube compartments and as the correct pressure is reached the pump stops.
Then i set the dial to 9psi and inflate the air floor to its correct pressure then the pump stops. I have roberts halkey valves and simply hold the pipe with the correct adaptor in the valve and a bar on the adaptor pushes and opens the valve until the pump stops at the correct pressure, as i remove the pipe and the valve closes instantly with no pressure loss.
The pump also reverses and deflates the SIB.
The pump will inflate larger SIB's from a single charge as it is recommended up to 15 minutes of continuous use. It makes things a lot easier all round
Not a good idea to inflate each tube to max then the next chamber to max etc. Do them all in turn to 50% then go round again to 100%.
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Old 01 June 2015, 13:08   #10
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Is there an electric pump by Bravo or another company that uses a cigarette lighter instead of pos/neg battery cables? I don't have a battery nearby in a handy location when inflating the boat
As NOS says, the draw is too high for a standard socket. The very simplest solution is buy a 12v sealed lead acid battery (as used in alarms systems, UPS, etc) and bring that in the bag - then you can inflate wherever you want

I'm going to build mine into a plastic box with the battery and all the "bits" included - the pumps really don't like inhaling sand and guess what the seaside is covered with?
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