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 12.5hp briggs ic help

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xxXMowerdudeXxx
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PostSubject: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeMon Apr 01, 2013 4:32 pm

my engine has been starting hard. and everytime i try to start it it gets harder to even turnover. its not the starter just rebuilt that. can someone help me figure out what is wrong with it i think it may be a valve.



i also,being stupid, forgot to check the oil so its been running bone dry

should i rebuild this engine or replace it
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeMon Apr 01, 2013 4:46 pm

Run it till it blows!

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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeMon Apr 01, 2013 4:50 pm

@TheRainbowBoxer wrote:
Run it till it blows!
i want to but it wont start keeps just turning over and over battery may ne too weak
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeThu Apr 04, 2013 10:22 am

My engine takes a minimum of 350 amps to start with a new starter. Try jumping it.
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeThu Apr 04, 2013 2:07 pm

if you ran it with out oil its most likly junk the cyl walls are prob all scored up
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeFri Apr 05, 2013 12:16 pm

@gearheadmike wrote:
if you ran it with out oil its most likly junk the cyl walls are prob all scored up
ya thats what i figured im replacing it now anyways i have a 14hp twin briggs that came off a 87 mongomery ward. im currently tearing the engine down and cleaning everything inside. but when i put it on i will need a new battery. i have a teeny one now and i dont thin that its enough for the 12.5 horse
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeFri Apr 05, 2013 12:19 pm

Im using a 230 cca battery for my mower, it starts *shurg*
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeFri Apr 05, 2013 6:33 pm

I have a flathead 12.5hp, think my battery's a 230cca aswell. They like some juice!

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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeFri Apr 05, 2013 8:24 pm

Bad alternator, Might have trained the battery
Valves out of line, so the compression release isn't working. (If Applicable)
Ground may not have a good connection
Positive wire may not have a good connection

Im sure they are many more possibilities, but these are the only ones I though of so far....Instead of replacing it, I'd work on popping the head off and seeing if the cylinder walls are totaled, even if you have a spare engine.
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeFri Apr 05, 2013 8:35 pm

I think I have the same motor only mines the iron sleeve. I don't think I have much oil at all. ita blak and low, half off it is on the side of the motor bc the dipstic seal is broken

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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeFri Apr 05, 2013 9:05 pm

@Murray modder wrote:
Bad alternator, Might have trained the battery
Valves out of line, so the compression release isn't working. (If Applicable)
Ground may not have a good connection
Positive wire may not have a good connection

Im sure they are many more possibilities, but these are the only ones I though of so far....Instead of replacing it, I'd work on popping the head off and seeing if the cylinder walls are totaled, even if you have a spare engine.
thats what im going to do
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeWed Apr 17, 2013 3:03 pm

another thing i noticed about the engine was that when i jump start it it starts tight up but with battery it doesnt. and it stalls whenever i put load on it like tryin to go forward.

any idea how to fix this
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greener179
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PostSubject: Re: 12.5hp briggs ic help   12.5hp briggs ic help Icon_minitimeWed Apr 17, 2013 5:09 pm

If you do get it running but it burnt oil use ome thicker oil and some stuff called motor honey works great
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