The lawnmower beer.

Grain Bill / Fermentables

• 4.9 lbs 2-Row Pale Malt
• 5 lbs 6-Row Pale Malt
• 5 lbs Flaked Maize
• 1.2 lbs Pilsner Malt
• 0.5 lbs Caramel 10

Hops

• 1 oz Galena (13.8AA)

Yeast (Split Batch)

• Mangrove Jack’s M54 Californian Lager
• Mangrove Jack’s M84 Bohemian Lager

Other

• Citric Acid
• Whirlfloc
• Yeast Nutrient

Target Stats

• 11 Gallons
• OG 1.042
• FG 1.009
• ABV 4.32%
• IBU 21.12
• SRM 2.8

Final Stats

• 11 Gallons
• OG 1.044 Tilts (1.050 hydrometer)
• M54
  • FG 1.004 Tilt (1.009 Hydrometer)
  • ABV 5.25%
• M84
  • FG 1.007 Tilt (1.013 Hydrometer)
  • ABV 4.86%
• 78% Efficiency

Prior to Brew Day

Collect water to allow chlorine to dissipate.

Brew Day

Heat 10 gallons of water to 156°.

Gently dough in grains until all grain is covered by water.

Mash grains at 149° for 1.25 hours.

Remove grain bag, rinse with 4 gallons of water and allow grains to drain, resulting in 12 gallons of wort.

Bring wort to a boil.

Add 0.75 oz Galena hops and continue boil for 55 minutes.

Add 0.25 oz Galena hops, yeast nutrient and whilfloc tablet and continue boil for 5 minutes. (This is a good time to drop in the wort chiller and rehydrydate the yeast.)

Once wort temperature reaches 68°, take OG reading and continue to reduce wort temperature to 50°.

Sufficiently aerate and transfer to primary fermenters.

Pitch yeast packets into each fermenters.

Lager, rest and enjoy!

Notes:

• March 3, 2019, Brew Day
  • Added 1/2 tsp citric acid to drop pH to 5.23
  • Pitched yeast at 68°
• 30 hours
  • M84 – 1.038 – 2 inch thick, white krausen.
    
  • M54 – 1.043 – Small, tan yeast clumps. One of the weirdest starts I’ve ever seen on a brew.
    
• 40 hours
  • M84 – 1.024 (Started raising the carboy temperature 5 degrees every 12 hours to 68°.)
  • M54 – 1.038
• 64 hours
  • M84 – 1.012
  • M54 – 1.032
• 88 hours
  • M84 – 1.008
  • M54 – 1.024
• 6 days
  • M84 – 1.007 – Krausen has dropped out and beer is starting to clear.
  • M54 – 1.007 – Small krausen, which resembles a baking yeast foam, remains. Beer is clearing under the remaining krausen.
• 13 days, kegged!
  • M84 – 1.004 – Beer is clearing and gravity has dropped resulting in a 5.25% ABV. This is quite a bit stronger than the lawnmower beer I was shooting for. 🙂
  • M54 – 1.007 – Beer has naturally cleared and gravity has not changed in a week.
• 3 weeks, both versions are good, however I currently prefer the Bohemian lager. I also would not add any crystal malts in future versions.