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Joined: Nov 2015
Posts: 5
Novice
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Hello all,
I have a Craftsman 21" mower with a B&S 120K02-0253-E1 - 03010757. Does anyone know what cubic capacity is the engine please?
It says 6.75 on the engine sticker.
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Joined: Jan 2015
Posts: 1,548 Likes: 25
SENIOR TECHNICIAN
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125K02-0253-E1 6.75 Gross HP 190cc (11.6 CI) just short the 12 CI indicated by the model number.
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Joined: Nov 2013
Posts: 6,938 Likes: 322
Forum Historian
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Many thanks AVBI knew you would have the answer.  --------------------- Jack
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Joined: Jan 2016
Posts: 8,199 Likes: 233
SENIOR TECHNICIAN
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Ok AVB I have one, I think this is the numbers 129802 0412
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Joined: Jan 2015
Posts: 1,548 Likes: 25
SENIOR TECHNICIAN
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129802-0412-01
5.5 Gross HP 190cc
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Joined: Jan 2016
Posts: 8,199 Likes: 233
SENIOR TECHNICIAN
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Thanks AVB, any idea how they vary the gross HP with the same cc
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Joined: Jan 2015
Posts: 1,548 Likes: 25
SENIOR TECHNICIAN
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Not an engineer but I assume it something to do with timing and valve duration.
Last edited by AVB; 18/05/17 08:10 PM.
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Joined: Feb 2006
Posts: 4,675 Likes: 165
SENIOR TECHNICIAN
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I learnt with some old 2 stroke outboards they just constrict the inlet with a metal ring insert to lower the HP to what they wanted.
Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
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Joined: Jan 2015
Posts: 1,548 Likes: 25
SENIOR TECHNICIAN
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Thanks reminding me to mention that on some engines do have restrictor plates are used much like they do auto racing to keep the horse power down. I don't think they were used on the smaller Briggs engines. I do see them sometimes on the v-twins.
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