B&S fuel pump

Geochurchi

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Hi All, before I tear this fuel pump apart, any idea what’s causing it to weep out of the two holes on the top? engine runs fine otherwise. It’s a
Mikuni pump.
Geo ??
 

Scrubcadet10

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This one1648578123478.pngor this one 1648578155363.png or an opposed twin pump? 1648578204921.png ;)
Most fuel pumps aren't serviceable, besides the Opposed Twin pumps.
 

Geochurchi

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The middle black one, I have a pic but file is to large for this site.
Geo??
 

StarTech

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Not repairable even if you see screws holding it together.
 

Scrubcadet10

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Not repairable even if you see screws holding it together.
Although if it's weeping oil, could that be indicative of a blown head gasket? (oil coming through the pulse?) or faulty breather?
That is if it's weeping oil, not gas. if gas, replace the pump.
 

bertsmobile1

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They leak out of the air breather for 2 reasons
fuel = punchered diaphragm
oil = blown head gasket
And as already mentioned, no service parts available so it is just to satisfy your curosity
 

Geochurchi

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It’s definitely gas, I’ll keep an eye on it ,If continues to leak it will get replaced, engine hasn’t run in years , probably dried out.
Geo ??
 
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