12.5hp briggs ic help

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

Run it till it blows!

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

My engine takes a minimum of 350 amps to start with a new starter. Try jumping it.

if you ran it with out oil its most likly junk the cyl walls are prob all scored up

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

Im using a 230 cca battery for my mower, it starts *shurg*

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

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.

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

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

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

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