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Thread: anyone on here familiar with a briggs & stratton 11hp motor?

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    Not Much To Do SNAFU's Avatar
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    Default anyone on here familiar with a briggs & stratton 11hp motor?


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    the mower has a vertical crank 11hp briggs motor with a serious oil leak.
    meant to fix it over the winter but mower was stuffed in the back of the garage and other things took over.
    looks like it could be base gasket (if it has one) area but cant actually see as too many bits of mower in the way.
    uses 1/2l of oil to mow 3/4 acre.
    any ideas or common issues.


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    Default Re: anyone on here familiar with a briggs & stratton 11hp motor?

    Find the engine number and Download the manual or parts list.
    There is also a repair manual online which covers OHV and
    side valve motors, I have it somewhere .
    11HP is quite big , is it a Ride on type mower.

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    Should Get Out More Julian_Boolean's Avatar
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    Default Re: anyone on here familiar with a briggs & stratton 11hp motor?

    I know about the small side valve ones, but 11hp is big for a mower

    Sent from my SM-T560 using Tapatalk

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    Should Get Out More Lostboy's Avatar
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    Default Re: anyone on here familiar with a briggs & stratton 11hp motor?

    I'm glad you said that. I assumed that there was a decimal point missing.

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    Default Re: anyone on here familiar with a briggs & stratton 11hp motor?

    More than likely the crank seal.
    It's probably the same as a 4HP so unbolt and lift off the engine. Turn upside down. Undo the crankcase. Pull it off over the crank shaft. Prise out old seal. Tap in new.

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    Not Much To Do SNAFU's Avatar
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    Default Re: anyone on here familiar with a briggs & stratton 11hp motor?

    32" cut ride on. 11hp a bit much for a Suffolk punch

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    Default Re: anyone on here familiar with a briggs & stratton 11hp motor?

    Quote Originally Posted by SNAFU View Post
    uses 1/2l of oil to mow 3/4 acre.
    any ideas or common issues.
    Bloody hell-a pint of it!!

    Quote Originally Posted by Nobbynumbnut View Post
    More than likely the crank seal.
    It's probably the same as a 4HP so unbolt and lift off the engine. Turn upside down. Undo the crankcase. Pull it off over the crank shaft. Prise out old seal. Tap in new.
    Sounds reasonable but how come such a serious failure there? I'd at least make sure that replacement seals are upgraded & look for what the hell might have bust the originals.

    Quote Originally Posted by SNAFU View Post
    32" cut ride on.
    36" Westwood type body from 1980's here. Was offered with B&S lump, but ours has the kawaski one. I've never so much as touched the engine at all. Just changed the oil & it uses none. Your better long term bet (seeing as regardless the B&S has to come out) might well be to replace with Jap equiv.

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