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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > low abv
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Old 11-29-2012, 04:45 AM   #1
eemmerick12
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Default low abv

Original gravity was perfect, the beer fermented great, but the final gravity was low, it was supposed to be a 5% batch but came out 3.9%. Does anyone have info on why this may have occurred?
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Old 11-29-2012, 04:55 AM   #2
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If the FG was lower it means your abv is higher. Post some details like the recipe, yeast you used and your OG.
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Old 11-29-2012, 05:06 AM   #3
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The og was 1.048, the final was 1.018,the final was supposed to be 1.012-1.014, the beer is a stout kit partial mash
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Old 11-29-2012, 03:31 PM   #4
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How long did you ferment in primary?? Sounds like you just rushed it.
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Old 11-29-2012, 03:33 PM   #5
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Quote:
Originally Posted by eemmerick12 View Post
The og was 1.048, the final was 1.018,the final was supposed to be 1.012-1.014, the beer is a stout kit partial mash
What was the mash temperature you used?? Confirm that the thermometer you used is actually accurate at mash temps.
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Old 12-04-2012, 08:55 PM   #6
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The mash temp was 156, and it was in primary for two weeks.
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Old 12-04-2012, 09:00 PM   #7
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Quote:
Originally Posted by eemmerick12 View Post
The mash temp was 156, and it was in primary for two weeks.
There's your sign...

Higher mash temps produce more long chain sugars (which the yeast won't/can't eat) resulting in more body and lower ABV (higher FG)...
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