Spark plug gets gas fouled every cold start

[The Brain]

thanks on carb part# what is correct part# for head gasket?

 

[MParr]

thanks on carb part# what is correct part# for head gasket?

I come up with a B&S part #273280S

 

[The Brain]

yeah thats what I came up w/ from parts tree. could a faulty carburater flooding the cylinder create to big of an explosion which ruined the head gasket?
BTW I have a spare carb from orginal engine.but am uncomfortable dissassembleing a carb. I'd rather swap in a replacement but then I'll have to figure out how to adjust. or can I count the # of turns each screw? thanks

 

[MParr]

I suggest that you get the B&S carburetor. It's a crap shoot with aftermarket stuff.
Replace all of your fuel lines and your fuel filter. Adjust the valves after fitting the new head gasket.
I don't think that will have too much of a problem with setting up your carburetor.

 

[Auto Doc's]

I'll take a good image of head. it felt smooth around the carbon stain. I don't have a tempered glass table. I do have a piece of plexie glass about 1/8" thick x 2'. what do you think about the amazon gasket?

Plexiglass is not stabile and usually not true "flat" level. You need a perfectly solid flat surface has possible to get the head truly flat on the gasket mating surface.

Amazon just sells the gasket; they don't make them. I have not had any problems using them though.

I advise you to get a B&S small engine repair manual that cover your model. They can be found as online downloads. They are much cheaper than guessing and making mistakes.

 

[The Brain]

This is definity a carb. Related problem which I believe lead to the blown head gasket.


I just found out how the needle/seat and sticking float can produce fuel flooding cylinder an get into crankcase. I will remove carb. Bowl an inspect float for holes if float is full of fuel it won’t float an needs replacing proceeding on test the float blowing into upsidedown carb. Result float is blocking flow which means it’s working.



Then w/ carb rightside up blow again if float is functioning properly it should alow flow so when I blow it should flow though carb. Maybe I can get away w/ just cleaning the needle/seat an possiably replace the float.



So I believe the carbs float is malfunctioning bc I do smell fuel in oil an I assume the gasket blew bc of to much fuel inside the cylinder.
how bad can the el cheapo amazon carbs be?


will report back an thanks.

 

[MParr]

How bad can the cheapo Amazon carbs be? It's a crap shoot. If you are planning on keeping the mower, put on a Briggs carburetor. You will thank yourself later.