Mangrove Jack's M20 Bavarian Wheat Yeast

[Brianbrewed]

Anybody have experience with this yeast.

Brewed a wheat beer with 50% lager malt & 50% Wheat.
Mashed & 43 degrees for 20mins, then 67 degrees for 40mins & mashed out for 15mins.


OG was 1050.

Chucked in a re-hydrated pack of M20 at 20degrees and fermented at 19degrees.

It took off like a rocket within 12 hours but it seems to have stopped/slowed down at 1020.

Anybody have experience with this yeast crapping out early?

 

[Agentgonzo]

Yes
https://www.thehomebrewforum.co.uk/...jacks-m20-yeast-crapping-out-at-1-020.100023/

 

[dad_of_jon]

I've done a few with MJ's m20 it doesn't like going much over 5%. I've had 8% with fermentis wb-06 with added raspberry syrup. Maybe add a different yeast to get it down the last few points?


Brew 17 - we'll wheat again. 30/04/2016
2kg dwe
450g golden syrup
500g clear candi sugar
50g galaxy hops
mj's baverian wheat yeast. (m20)
og 1.050
pitched rehydrated yeast at 30 , room temp 22
1008 adjusted
5.51%

brew 30: working hard in the yard 21/05/2017
1.5 kg pilsner muntons lme
1.5 kg muntons dwe
450g golden syrup
mj's m20 bavarian wheat
pitched at 27 degrees
50g galaxy & 50g chinook
og 1051
fg 1013
4.99%

28/05/2019 - wheat beer - 50th beer
3 kg dwe
500g GS
MJ Bavarian yeast
100 saaz 2.2% alpha- 20 min boil in 4.5 litres of water
21.5 litres - 1059 -1017 pitched at 26
5.51%


20/04/2020 brew 58 - out of the light
2.5kg dwe
1kg dark dme
100g saaz 15 min boil
MJ bavarian wheat
pitched at 27
21.5 litres in FV - 19.83 litres bottled
1062 adjusted 1019 = 5.64%


10/06/2021 - brew 68 - easy glider american wheat ale

1Kg light dried malt extract (ldme)
2Kg dried wheat malt extract (dwe)
500g medium dried malt extract (mdme)
650g golden syrup(GS)
5 litres boiled chase spring, stir in GS
100 Amarillo - flameout for 30 mins
top up to 20.5 litres
pitch rehydrated MJ M20 bavarian yeast at 26C
og = 1055
fg = 1013
5.1% abv

 

[chthon]

I've done a few with MJ's m20 it doesn't like going much over 5%. I've had 8% with fermentis wb-06 with added raspberry syrup. Maybe add a different yeast to get it down the last few points?

It should be able to ferment to 8% ABV. I brewed a Dunkelweizen of 7,5% ABV with it, without problem.

 

[dad_of_jon]

It should be able to ferment to 8% ABV. I brewed a Dunkelweizen of 7,5% ABV with it, without problem.

Agreed, that's what it says on the packet.
In fact I'm looking to do a doppleweisenbock next but they all had at least 2 weeks in the fv and weizens can be drunk young so I didn't wait any longer, besides 5.5% for a weizen is where they usually are which suited me.

But for a doppleweisenbock thats right at the limit of the yeast

 

[Jim Brewster]

Used it a few times with good results, I think it's a good yeast. Used it in a brew on Friday, left at room temp at 19 degrees, checked gravity today (four days on), it's reached final gravity of 1013.

 

[Bosch]

Did a gravity reading on this yesterday.
It has dropped to 1015.

Happy days