Aspire Nautilus, filling, airflow and stopping liquid in the mouthpiece
A warm drop on the tongue on the very first puff is a familiar let-down for anyone who likes a tight draw. On an Aspire Nautilus it is more puzzling still, because the tank owes its reputation to precision. The tank is full, the coil is new, the ring is set, and yet something is climbing where it should not. Before blaming the hardware, it pays to go back over each step in order.
Using an Aspire Nautilus without spitback, the short answer
An Aspire Nautilus is set up in four steps. Prime a new coil with a few drops, fill while leaving a small pocket of air under the cap, wait a few minutes for the cotton to soak through, then set the wattage within the range printed for the coil before opening the airflow one position at a time.
When vaping, press the fire button and draw at the same moment, with a gentle, steady pull. If liquid still reaches your mouth, the cause is usually a flooded coil, a button pressed too early, a wattage set too low or condensation in the drip tip. Each one has its own fix, covered below.
How the parts of an Aspire Nautilus shape the draw
The Nautilus tanks Aspire currently lists, led by the 3S and the 3SR, share the same layout and the same coil family. E-liquid goes in from the top without taking the base apart, through a cap that slides open on the 3S and opens with a simple push on the 3SR.
On the 3S, the coil presses into place rather than screwing in, and a shut-off valve stops e-liquid entering the coil chamber while you change it. At the bottom, a ring meters the incoming air, with seven settings listed for this model, and the 510 drip tip can be swapped for any other 510 tip.
Capacity is where UK shoppers need to look twice. Aspire lists the 3SR in a 4 ml standard version and a 2 ml TPD version, while the 3S is quoted at 3.75 ml with its metal honeycomb tube and 4 ml with the extra glass tube. Only the 2 ml figure fits the cap on refillable tanks in the UK.
Filling a Nautilus tank without flooding the coil
Most spitback starts at the filling stage. Three habits prevent it, and they apply to every Nautilus that fills from the top.
Priming a new coil
Drip a few drops of e-liquid straight onto the cotton visible through the coil’s wicking holes before fitting it. Once the tank is full, leave it to stand for about five minutes, the time Aspire gives, so the wick is soaked right through before the first firing.
Closing the airflow before opening the cap
Close the air inlets before opening the top cap, and only reopen them once the cap is back on. With the tank open, air then has no way of pushing e-liquid downwards. Tilt the bottle against the wall of the tube and never over the central chimney, because liquid that falls into it runs straight through the coil and out of the air inlets.
UK law shapes this step too. Regulation 36 of the Tobacco and Related Products Regulations 2016 caps a refillable tank at 2 ml and requires a way of refilling without leakage, one accepted route being a bottle nozzle at least 9 mm long, narrower than the tank’s filling opening. That nozzle is what lets you aim clear of the chimney.
Leaving a pocket of air under the cap
Do not fill to the brim. The small air gap left at the top creates a slight vacuum that helps hold the e-liquid in place. How tube shape, liquid level and flavour relate is covered in our guide to choosing a vape tank for a mouth-to-lung draw.
Setting the airflow ring and wattage in the right order
Airflow comes last, once the coil is fitted and the wattage is set. Start with the ring almost closed, draw slowly, then open one position at a time until the pull stops feeling forced.
Each position changes the area open to the air, and that area follows the square of the diameter. A hole twice as wide therefore offers four times the area. A single 1.2 mm hole leaves 1.13 mm² for the air, two 1.5 mm holes leave 3.53 mm², an area 3.1 times larger.
Those diameters are only an example, as Aspire does not publish its hole sizes. The airflow comparison tool on our home page repeats the sum for any two settings, without claiming to predict the feel of the draw, since the shape of the air channels and the chamber matter too.
Wattage, on the other hand, follows the coil fitted. These are the coils Aspire lists as compatible with the 3SR, with their ranges, never to be exceeded at the top end.
| Coil | Resistance | Stated range |
|---|---|---|
| Nautilus BVC | 1.8 ohm | 10 to 14 W |
| Nautilus BVC | 1.6 ohm | 7 to 11 W |
| Triton Mini Clapton | 1.8 ohm | 13 to 16 W |
| Nautilus Mesh | 1.0 ohm | 13 to 15 W |
| Nautilus 2 | 0.7 ohm | 18 to 23 W |
| Nautilus 2S Mesh | 0.7 ohm | 20 to 25 W |
| Nautilus 2S | 0.4 ohm | 23 to 28 W |
| Nautilus Mesh | 0.3 ohm | 23 to 28 W |
For a tight draw, the first four rows are the ones that matter. Coils below 1 ohm need more power and, in practice, more air, and they suit a looser draw.
Why am I getting liquid in my mouth from my Aspire Nautilus
Aspire has a troubleshooting page for spitting, which it describes as possible on any tank. Each cause has its own sign and its own fix.
A flooded coil
A crackle, then hot droplets on the first few puffs, often after a refill or a long break. The saturated wick cannot vaporise everything it receives. Turn the tank mouthpiece down, give it a shake over a tissue to clear the excess through the drip tip, then wipe the drip tip and its seat.
Pressing the button before drawing
Holding the button before you inhale heats a coil with no air moving through it, and the liquid thrown off heads for the mouthpiece. Press and draw together, and release the button as soon as you stop inhaling.
Drawing too hard
A sharp pull draws e-liquid in faster than the coil can vaporise it, and the surplus ends up in the chimney. A softer, steadier inhale gives the wick time to keep up.
Condensation in the drip tip
Some vapour condenses on the walls of the chimney, the drip tip and the filling area, then gets drawn up as droplets. A cotton bud run through the drip tip and around the fill port every so often deals with it.
Wattage too low or the wrong e-liquid
Below the coil’s range, the liquid reaching it is not fully vaporised. Raise the power one watt at a time without going past the top figure. A very thin e-liquid on a low-resistance coil, with its wider wicking holes, can also flood the chamber. For the 1.6 and 1.8 ohm BVC coils, Aspire suggests starting with an e-liquid of 50 to 60% vegetable glycerine.
A loose part or a tank left on its side
A worn seal, a coil not pushed fully home or a loose tube lets e-liquid through where it should not go. Laid flat, especially when half empty, the tank can also leak through the air inlets, because the coil’s wicking holes are no longer covered. Store it upright.
FAQ
Five questions that come up around the Nautilus and that the sections above leave aside.
How do I turn on an Aspire vape with a Nautilus tank?
The Nautilus is a tank, with no button and no battery. It screws onto a battery with a 510 thread, and that battery is what you switch on, following its own manual. The procedure varies from one device to another.
Can the Nautilus 3S take a glass tube?
Yes. Aspire quotes 3.75 ml with the metal honeycomb tube and 4 ml with the extra glass tube. Both figures are above the 2 ml cap for refillable tanks in the UK, so check the capacity stated on the listing before buying.
When should I refill the tank?
Before the level drops below the coil’s wicking holes. Aspire advises topping up in good time rather than waiting for the tank to run dry, so the cotton never fires without e-liquid.
How do I clean an Aspire Nautilus?
Aspire suggests rinsing it in cold water and leaving it to air-dry overnight whenever the flavour fades or the tank looks dirty. By its own estimate that comes round every one to two months, depending on use.
Does the Nautilus suit direct lung vaping?
Aspire presents the series as suitable for both styles of draw. In practice, a looser draw means the low-resistance coils and a wide-open ring, which moves away from what makes the tank worth having for flavour.
Aspire Nautilus, a setup built in the right order
Almost everything that makes a Nautilus spit is decided before the first puff, at the filling stage and in the choice of wattage. Air comes afterwards, last of all, and it is what gives the draw its finesse. Taken in that order, the steps become simple and the flavour stays clean down to the bottom of the tank.
Other mouth-to-lung tanks follow the same logic, give or take a few details of assembly. If droplets persist, go back through the causes one at a time rather than changing everything at once, as that is the only way to know which one was affecting your Aspire Nautilus.
In the same nook
- Innokin Zenith 2, matching each Z Coil to its wattage, another classic built around ready-made coils
- Filling, switching on and troubleshooting the JustFog Q16, a tight-draw kit set by voltage
- Kangertech and its tight-draw tanks, back to the EVOD and the Protank
L’Alcôve Feutrée is written for adult readers only. Vaping products usually contain nicotine, which is addictive, and nicotine vaping products are not for sale to anyone under 18 in the UK. This piece describes equipment and is not a buying recommendation.