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  #1  
Old 04-27-2013, 11:42 PM
evergreen61dc evergreen61dc is offline
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Default Oil leaking out of fuel pump
I have a LT1018 with a Briggs 18hp motor. Oil is coming out of the screen on the fuel pump. More so in high throttle than low. Any ideas?
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Old 04-28-2013, 12:08 AM
J-Mech J-Mech is offline
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The fuel pump works off of "crankcase differential pressure". I'll explain if need be.... But it could either be that the fuel pump has a gasket or other internal seal failing, or it could be your crankcase vent tube that runs to the carburetor. I'd probably check the vent tube first. Make sure it is intact, with no holes in it or that it isn't kinked. If its fine, prob should just get another fuel pump.
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Old 04-28-2013, 09:27 AM
evergreen61dc evergreen61dc is offline
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The tube is intact and not kinked.
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Old 04-28-2013, 10:09 AM
evergreen61dc evergreen61dc is offline
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I have read from other sites anywhere from head gasket to the fuel pump could be the cause or the breather or breather tube. Anyone else run into this issue?
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Old 04-28-2013, 11:03 PM
evergreen61dc evergreen61dc is offline
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Okay well I went ahead and tore apart the whole thing, on order valve cover gasket and head gasket. Hoping that's the fix. Any suggestions if I should clean off the piston head? If so with what?
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Old 04-29-2013, 12:00 AM
J-Mech J-Mech is offline
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Well, IMO, you went a little far..... I really think if you don't have a vent tube problem, then it's probably in the fuel pump.... But, ok. Yes, you can clean the top of the piston off. Carb cleaner, brake cleaner, mineral spirits, .... any of these and a brass wire brush would be fine. Make sure to do it with the piston at the top of its stroke. When its clean, blow out the gap between the piston and cylinder wall with an air compressor. Then roll the piston down, wipe the cylinder walls clean.
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