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19.5 briggs engine oil coming out fuel pump vent


charlie s's Avatar
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12-05-11, 03:56 PM   #1  
19.5 briggs engine oil coming out fuel pump vent

This motor is on a j deere LA110 mower mod#31P677 TYPE0130E1 CODE 060728ZE When i run machine i get oil out of hose going to fuel pump this hose comes from tube where you fill oil.Oil is not over filled took compression test about 80 lbs.When i take off crankcase breather hose at carb. and run engine the hose is letting out blue smoke and if i leave this hose off and run motor i don't get oil from hose to fuel pump.the funny thing is the mower starts right up every time and runs pretty good. any help much appreciated.

 
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cheese's Avatar
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12-05-11, 05:18 PM   #2  
Kind of sounds like a blown head gasket. Does it smoke heavily at times? Does the oil smell like gas?


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charlie s's Avatar
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12-05-11, 05:58 PM   #3  
Thanks for quick reply. When this first happened the machine smoked real heavy like a fog machine, then got better.I did compression check 80lbs , the way i checked was with gauge in spark plug hole not sure if that is the way you check with these motors.The funny thing is the motor runs pretty good.Not sure about smell but when oil comesI out fuel pump it looks milky even though oil is fresh. I ordered repair manual just trying to get ideas. Also this machine was always well maintained Thanks again

 
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12-08-11, 09:43 AM   #4  
Still wondering if there is gas in the oil or not.


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charlie s's Avatar
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12-08-11, 03:18 PM   #5  
not sure about gas in the oil , when the oil comes out pump its a little milky this could be from air . i am on the road so i won' t be able to work on this till 7/17 when i pull out dipstick oil level good and clean .I think iam going to take off head replace gasket adjust valves and see what happens I never did head gasket on lawn mower but it doesn't look to hard , I ve done h gaskets on harleys and v.w's anyway instead of guessing I'll pull off head and report back thanks alot

 
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01-07-12, 06:39 AM   #6  
problem solved

Thanks to everyone for help,the problem was head gasket. The gasket had slight damage in the square area where the push rods are air was being pushed into this area and pressurizing crankcase after i did repair ,all symptons cleared up thanks again

 
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01-07-12, 10:32 AM   #7  
Glad you got it, thanks for the update!


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01-08-12, 07:49 AM   #8  
Hmmm.... I have some similar symptons on a 10HP Briggs on a generator. I posted about it months ago, make me wonder if I have a head gasket issue as well. I think I'll pull the head just to take a look, not that hard!

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01-08-12, 04:23 PM   #9  
is your engine OHV or flat head?

 
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01-08-12, 08:48 PM   #10  
I see your old thread about the generator, but no mention of the oil from the vent. You said it had gas in the oil. That would definitely cause oil to come out the vent. I wouldn't pull the head to check the gasket unless there are other factors pointing to it. The reason I said head gasket for this original posters problem is because this engine is notorious for head gasket problems. Yours is not.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

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