Saad Balaa 5	6	7	8 (293)
March 2	3 (63)	4 (429)	5

Ca13-4	Ca13-5 (348)	Ca13-6	Ca13-7 (350)
tagata ma te kihikihi	koia ra kua oho		manu rere
τ Aquarii (345.7), μ Pegasi (345.9), ι Cephei (346.0), γ Piscis Austrini, σ Pegasi, λ Aquarii (346.5)	Scheat Aquarii (347.0), ρ Pegasi (347.2), δ Piscis Austrini (347.4)	Fomalhaut (347.8), Fum al Samakah (348.3)	Scheat Pegasi, π Piscis Austrini (349.3), Markab Pegasi (349.5)
September 2	3	4	5 (248)
Alterf 4	5 (140)	6	7
no star listed	Alkes (165.6), Merak (166.2)	11h (167.4)	no star listed
no star listed	Alkes (165.6), Merak (166.2)	Dubhe (166.7)	no star listed

4°17'09" (the star of the 2nd Spout) = 4.286º and 4.286 * 365¼ / 360 = 4.3 days after 348.3, which results in RA day 352.6.

And 17°08'34" (the star of the Belly of the Fish) = 17.143º and 17.143 * 365¼ / 360 = 17.4 or RA day 348.3 + 17.4 = 365.7.

Ibn 'Arab:
*28 12.857º**	= 360.00º	= 364 days
12.857º	*= 13 / 364 360º**	= 364 / 28 = 13 days
φ Aquarii (21.428º) - Sadachbia (8.571º)		= 12.857º = 13 days
Al Batn al Hut (17.143º) *- Al Fargh al Thani* (4.286º)**		= 12.857º = 13 days
*Al Fargh al Thani*	*4.286º / 360º 365¼ = 4.3 days**
*Al Batn al Hut*	*17.143º / 360º 365¼ = 17.4 days**

Clearly Simma (γ Piscium) could be the 2nd Spout, 348.3 + 4.3 = 351.7 + 0.9:

Saad Balaa 9	10 (295)	11
March 6	7 (432)	8 (68)

Ca13-8 (351)	Ca13-9	Ca13-10
kua moe koia i toona tahoga kua pu	haki pu	ka pu era
23h (350.0)	π Cephei (350.6)	Simmah (351.7), φ Aquarii (352.0), ψ Aquarii (352.4)
no star listed	π Cephei (350.6)	Simmah (351.7), φ Aquarii (352.0), ψ Aquarii (352.4)
September 6	7 (250)	8
Alterf 8	9 (144)	10
Al Sharas (168.6), Zosma (169.2), Coxa (169.4)	Alula (170.5)	Labrum (170.6)

Manzil		Begins on	Number of days		Stars
20	Al Na'am, The Ostriches	16 Jan (381)	13	257	Ascella & Nunki (ζ, ς Sagittarii)	287.9, 288.4
21	Al Baldah, The City	29 Jan (394)	13	270	Al Baldah (π Sagittarii)	290.1
22	Al Sa'ad al Dabih, The Fortune of the Slayers	11 Febr (407)	15	285	Dabih (β Capricorni)	308.1
23	Al Sa'ad al Bula, The Fortune of the Swallower	26 Febr (422)	13	298	Albali (ε Aquarii)	314.8
24	Al Sa'ad al Su'ud, The Fortune of the Fortunate	11 March (435)	13	311	Sadalsud (β Aquarii)	325.9
25	Al Sa'ad al Ahbiyah, The Fortune of the Hidden	24 March (448)	13	324	Sadachbia (γ Aquarii)	338.6
26	Al Fargh al Mukdim, The First Spout	6 April (461)	13	337	φ Aquarii	352.0
27	Al Fargh al Thani, The Second Spout	19 April (474)	13	350	Simmah (γ Piscium)	351.7
28	Al Batn al Hut, The Belly of the Fish	2 May (487)	15	365	17°08'34" Pisces

The star of the 2nd Spout (351.7) occurs practically at the same time as the star of the 1st Spout (352.0).

Counting according to Ibn 'Arab the 1st Spout could have been at 351.6 = 338.6 (Sadachbia) + 12.857º / 360º * 364.

But to reach the star at the Belly of the Fish we have to look for some star rising 351.6 + 13.0 - 362.4 (ω) = ca 2.2 days later than ω, some star without a Greek letter:

Looking again in Wikipedia I can find the following stars:

ω Piscium	23h 59m 18.60s	23h 59.310m	06° 52′ N	363.4	4.03
29 Piscium	00h 01m 49.44s	00h 01.824m	03° 02′ S	364.0	5.13
30 Piscium	00h 01m 57.59s	00h 01.960m	06° 01′ S	364.1	4.37
31 Piscium	00h 02m 24.17s	00h 02.403m	08° 57′ N	364.2	6.33
32 Piscium	00h 02m 29.76s	00h 02.496m	08° 29′ N	364.2	5.70
HD 6 Piscium	00h 05m 03.80s	00h 05.063m	00° 30′ S	364.9	6.32
33 Piscium	00h 05m 20.15s	00h 05.336m	05° 42′ S	364.9	4.61
4 Cet	00h 07m 44.10s	00h 07.735m	02° 33′ S	365.5	6.43
5 Cet	00h 08m 12.09s	00h 08.202m	02° 27′ S	365.7	6.18
34 Piscium	00h 10m 02.18s	00h 10.036m	11° 09′ N	366.1	5.54

HD refers to the Henry Draper Catalogue and Cet is the abbreviation for Cetus - modern man has changed the borders between the constellations. I have black-marked stars with a very low visual magnitude, suggesting we can disregard them.

Looking at the star chart there appears to be only one reasonable alternative, viz. the faint speck slightly later and above ω. If this is correct, then we can elmininate those stars which are below the equator and then there are only 32 and 34 to choose between. However, although 34 Piscium is closer to the target RA date 365.6 this star is too high up:

ω Piscium	23h 59m 18.60s	23h 59.310m	06° 52′ N	363.4	4.03
32 Piscium	00h 02m 29.76s	00h 02.496m	08° 29′ N	364.2	5.70
? Piscium				365.6
34 Piscium	00h 10m 02.18s	00h 10.036m	11° 09′ N	366.1	5.54

There are only 0.8 days from ω instead of the expected 2.2.

363.2 (32) - 13.0 = 350.2.

In rongorongo times Sadachbia rose in February 23 (Terminalia) when Castor culminated and the distance to φ Aquarii (The First Spout) was around 352.0 - 338.6 = 13.4 days. However, February 29 (the leap day) will change the standard manzil measure from 13 to 14 days:

Saad Al Thabib 11	12	13	11
February 21	22 (53)	23 (Terminalia)

Ca12-21	Ca12-22	Ca12-23 (339)
te niu ku hakatu ua	te maitaki - kupega tuku hia mai	mata hakatuu
λ Piscis Austrini (336.8), ε Cephei (337.2), Ancha (337.4)	ρ Aquarii (338.2)	Sadachbia (338.6), π Aquarii (339.5)
	ρ Aquarii (338.2)	~~Castor (419)~~
August 23	24 (236)	25
An Nathra 7	8	9 (101)
Simiram, Adhafera, Tania Borealis (154.7), Algieba, q Carinae (155.5)	Tania Australis (156.0)	μ Hydrae (157.1)

Saad Balaa 9	10 (295)	11
March 6	7 (432)	8 (68)

Ca13-8 (351)	Ca13-9	Ca13-10
kua moe koia i toona tahoga kua pu	haki pu	ka pu era
23h (350.0)	π Cephei (350.6)	Simmah (351.7), φ Aquarii (352.0), ψ Aquarii (352.4)
no star listed	π Cephei (350.6)	Simmah (351.7), φ Aquarii (352.0), ψ Aquarii (352.4)
September 6	7 (250)	8
Alterf 8	9 (144)	10
Al Sharas (168.6), Zosma (169.2), Coxa (169.4)	Alula (170.5)	Labrum (170.6)

23h (after the leap day adjustment) marks day 23h / 24h * 365¼ = 350.0 and once upon a time this may have been the end of the year. 50 weeks = 350 days.