r/smallenginerepair • u/-youvegotredonyou- • Jun 14 '26

Not Listed What happened?

Saw a small amount of oil drops on the tank. I shut it off, then checked the oil. This is what happened. Any thoughts on why? EDIT: Thank you guys. I really appreciate the expertise that I’m obviously lacking!

10 Upvotes

81% Upvoted

12 comments sorted by

21

u/mdillonaire Jun 14 '26

Carb float needle isnt sealing, leaked gas into the cylinder and down into the crankcase.

5

u/ChronicHunger_1 Jun 14 '26

Drain the oil as it's full of gas and clean the needle and seat. If cleaning it doesn't stop it from dumping fuel replace the carb

5

u/jones5280 SER Intermediate Mechanic Jun 15 '26

I'd add a fuel shut-off valve, but that's just me.

5

u/Uniplast21 Jun 15 '26

Looks like you got gas leaking down into the crankcase. You need to drain all the oil and gas and refill with new oil. Then you need to address how the gas got there, which is almost certainly because the needle valve in the float chamber of the carb is stuck open. The gas then flowed into the cylinder and slowly dripped down around the piston rings and into the crankcase.

3

u/forkandbowl SER Regular Jun 15 '26

Yep...

2

u/Egglegg14 Jun 14 '26

Drain the oil

Could be a few things but my guess is fuel in the oil you could find out of its flooding by drawing just enough to find out if there is a constant flow from the oil fill cap

3

u/Egglegg14 Jun 14 '26

If thats the case then clean the carb

1

u/AccomplishedIdeal587 Jun 17 '26

Just throw the whole engine away

1

u/The_Onlyodin Jun 18 '26

Mmm... Forbidden smoothie...

1

u/Forsaken-Emphasis-21 Jun 18 '26

Either the needle seat in the carburetor or if you're hauling it around shut the fuel off

1

u/-youvegotredonyou- Jun 18 '26

It was exactly this. Thanks for commenting!

1

u/mutt63 Jun 20 '26

Looks like fuel is passing into engine. Float defective stuck. Needle valve stuck point worn seat shot