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Problems with Oil in a Briggs & Stratton

#1

J

jwalter1

Hey Guys,


Need a little advice...I knew my Briggs and Stratton 28R707 mower was low on oil and the oil was old so I changed...It calls for 10w30 but I wasn't paying attention and I put SAE 30 on accident. It ran fine for awhile but then started backfiring and quit. So I then realized what I did and drained the oil only. I put regular 10w30 oil in and started it but now the engine will not run.

Any ideas?

Thanks!


Jason


#2

RobertBrown

RobertBrown

jwalter1 said:
Hey Guys,


Need a little advice...I knew my Briggs and Stratton 28R707 mower was low on oil and the oil was old so I changed...It calls for 10w30 but I wasn't paying attention and I put SAE 30 on accident. It ran fine for awhile but then started backfiring and quit. So I then realized what I did and drained the oil only. I put regular 10w30 oil in and started it but now the engine will not run.

Any ideas?

Thanks!


Jason
Click to expand...

The oil has nothing to do with the backfiring and stopping....what else can you tell us?
unless you put the oil in the gas tank


#3

reynoldston

reynoldston

it sounds like you might have been a little late on the oil change? SAE 30 shouldn't of hurt the mower but the low oil may have???


#4

J

jwalter1

The only other thing I did was add gas....It was not empty but I topped it off. It has been running fine until today....oh and I did put the oil in the right place. :)


#5

B

Black Bart

The oil has nothing to do with it not running but when you get it running I would use 5-40 Shell T-6 in it you live where it gets really hot my manual for my Briggs says use 40 over 90 degrees.
But first you need to find out why it won't run.


#6

reynoldston

reynoldston

Try a new spark plug maybe it got oil fouled? Could you of hit something? This would of sheered the key in the flywheel. can't think too much more that would make it back fire??


#7

W

wildbill

Not to be duh, but a motor runs on 3 things: Spark, Fuel, and Compression. I always check for a spark first, its easy to do. No spark, start looking for the safety switches, and if all are being made you have to dig deeper. If there is a spark, then I run a compression test. You should have at least 100 psi, if not....... While you are in the vicinity, set the valves. When you take off the rocker cover, the exhaust is the top one. Set the intake at .005 - .007. The exhaust gets .010 - .011. Then its the fuel testing time. Go through the carb, use some Gunk or a good cleaner. At least 80% of all the repairs I do involve old gas, carb deposits, plugged main jet.:smile:


#8

J

jwalter1

Well I replaced the plug and no go...Guess I will check the carb tomorrow...


#9

reynoldston

reynoldston

wildbill said:
Not to be duh, but a motor runs on 3 things: Spark, Fuel, and Compression. I always check for a spark first, its easy to do. No spark, start looking for the safety switches, and if all are being made you have to dig deeper. If there is a spark, then I run a compression test. You should have at least 100 psi, if not....... While you are in the vicinity, set the valves. When you take off the rocker cover, the exhaust is the top one. Set the intake at .005 - .007. The exhaust gets .010 - .011. Then its the fuel testing time. Go through the carb, use some Gunk or a good cleaner. At least 80% of all the repairs I do involve old gas, carb deposits, plugged main jet.:smile:
Click to expand...

Don't forget timeing- 4 things


#10

jroske

jroske

I would agree with the old fuel but in addition, if the fuel has ethanol in it it could be starting to separate from the fuel causing this.


#11

wjjones

wjjones

This is an old thread but its good to keep them going for future info for other members. If you see one that is old but has good info reply to it so it can be moved back to the front page.:thumbsup:


#12

mc_harley

mc_harley

reynoldston said:
Don't forget timeing- 4 things
Click to expand...

I would check the key first, you will also have spark when key is shared but at the wrong time and maybe the cover of your fueltank should be cleaned when there is no air in the tank there won't flow fuel in your carb! Take the cover of and start without to try out.
(Sorry for my Englisch, could be better :ashamed: )
mc_harley


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