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Joined: Nov 2015
Posts: 5
Novice
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.

Joined: Jan 2015
Posts: 1,528
Likes: 23
AVB Offline
SENIOR TECHNICIAN
125K02-0253-E1 6.75 Gross HP 190cc (11.6 CI) just short the 12 CI indicated by the model number.

Joined: Nov 2013
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Forum Historian
Many thanks AVB
I knew you would have the answer. laugh

---------------------
Jack

Joined: Jan 2016
Posts: 8,117
Likes: 231
SENIOR TECHNICIAN
Ok AVB I have one, I think this is the numbers 129802 0412

Joined: Jan 2015
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AVB Offline
SENIOR TECHNICIAN
129802-0412-01
5.5 Gross HP 190cc

Joined: Jan 2016
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SENIOR TECHNICIAN
Thanks AVB, any idea how they vary the gross HP with the same cc

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AVB Offline
SENIOR TECHNICIAN
Not an engineer but I assume it something to do with timing and valve duration.

Last edited by AVB; 18/05/17 09:10 PM.
Joined: Feb 2006
Posts: 4,675
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SENIOR TECHNICIAN
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!
Joined: Jan 2015
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AVB Offline
SENIOR TECHNICIAN
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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