Spark plug gets gas fouled every cold start

[The Brain]

The spark plugs will be wet with fuel and fairly clean, if there is that much fuel getting into the cylinders. If that's the case, I'm surprised that you haven't experienced a hydro-lock situation.
I just can't imagine that much fuel on top of the cooling fins coming from inside of the engine. Oil can certainly show up in that area.
I had Kawasaki Mule that would carbon foul the plugs. It eventually got worse. It progressed and hydro-locked the engine. I pulled the plug and cranked it over. Gasoline shot out of the spark plug hole. I changed the carburetor, plug, and traded that nightmare.

you know I hate to think about it but I was having a no spark issue an couldn't find the spark tester so I removed the spark plug an placed the spark plug near the cylinder head cranked her over to see if I had spark. what I had was a huge fireball from all the fuel shooting out the spark plug hole scared the crape out of me.
I never thought there would be that much fuel shooting out the sp hole. there's definitity something wrong w/ the fueling.

I also neglected to mention the cylinder head swap from the orginal engine. remember my thread about adjusting the valves? anyway I reused some of the old orginal engines valves. I also reused the old cylinder head gasket. pretty sure I tightened the cylinder head down tight. tightening from inside to outside in like 3 pass's.

I'll clean an inspect real close, if I don't see any visiable cracks then remove head an inspect the head gasket. will report back. thanks MParr

 

[MParr]

With what you just described, you definitely have a carburetor problem.
I got a good soaking after pulling the plug on the Kawasaki Mule. It's a good thing the spark plug wasn't connected to the plug wire.

 

[ILENGINE]

With what you just described, you definitely have a carburetor problem.
I got a good soaking after pulling the plug on the Kawasaki Mule. It's a good thing the spark plug wasn't connected to the plug wire.

Doesn't matter if the spark plug is connected or not. I have had 2 over the years where the spark plug was sitting on the work bench and cranked the engine over and had them static discharge ignite. I will not crank an engine over with a flooded cylinder if I can avoid it. Will blow the cylinder out with compressed air if available.

 

[Tiger Small Engine]

you know I hate to think about it but I was having a no spark issue an couldn't find the spark tester so I removed the spark plug an placed the spark plug near the cylinder head cranked her over to see if I had spark. what I had was a huge fireball from all the fuel shooting out the spark plug hole scared the crape out of me.
I never thought there would be that much fuel shooting out the sp hole. there's definitity something wrong w/ the fueling.

I also neglected to mention the cylinder head swap from the orginal engine. remember my thread about adjusting the valves? anyway I reused some of the old orginal engines valves. I also reused the old cylinder head gasket. pretty sure I tightened the cylinder head down tight. tightening from inside to outside in like 3 pass's.

I'll clean an inspect real close, if I don't see any visiable cracks then remove head an inspect the head gasket. will report back. thanks MParr

Charge battery, 12.05 volts is flat.
Remove carburetor and address the leaking needle and seat issue. Install fuel shut off valve for backup.

 

[MParr]

Doesn't matter if the spark plug is connected or not. I have had 2 over the years where the spark plug was sitting on the work bench and cranked the engine over and had them static discharge ignite. I will not crank an engine over with a flooded cylinder if I can avoid it. Will blow the cylinder out with compressed air if available.

I won't do it again.
That Mule had great compression.
The Nikki carburetor was horrible.

 

[The Brain]

I can remove an replace the carb. I’d probably mess up trying to rebuild a carb.



All I see that’s available is a carb replacement from ebay. a carb part# would be a big help.

219907-0131-B1 - Briggs & Stratton Vertical Engine carburetor parts NA image



top of carburater image linkage pointed frontward



right side of carburater



full choke throttle plate closed



throttle backed down (giving little fuel)

plate open





cable moving linkage toward front



cable moving linkage left


can I turn key switch to on (not ignition) an expect the fuel pump to pump fuel where I can observe where she's leaking?

thanks Guys for advising

 

[The Brain]

Update:I turned the key switch to ignition an observed fuel shooting straight up.this fuel appeared to be coming out the cylinder head but I didn’t see any cracks. I removed the cylinder head and found a damaged or blown head gasket it doesn’t appear to be blown all the way though just a bit of a layer.



There is a carbon stain on the cylinder head. Image

I assume all this compression being released is why the fuel wasn't getting burned thus the gas fouling the spark plugs. I was able to get away w/ swapping in new plugs bc the gasket wasn't completely releaseing compression I'm thinking.

how doe's this look https://www.amazon.com/gp/product/B08D8QP9NB/ref=ox_sc_act_title_1?smid=A2RFO9WR3VK6AB&psc=1
can I rub the head and block w/ steel wool before swapping in the new gasket? thanks

 

[MParr]

Are you using an electric fuel pump?

 

[Auto Doc's]

Need a better picture of the head.

You can carefully get the left-over material off the head with a razor blade.

After that you need to resurface the gasket face of the head using a true flat surface like a tempered glass table and 400 grit wet/dry sandpaper. Scrub the head gently across the sandpaper and you might be surprised how much sanding will be needed to re-true the gasket surface.

Sand until the entire gasket surface is clean aluminum.

The block surface will also need some light cleaning.

 

[The Brain]

Are you using an electric fuel pump?

not sure about the fuel pump, don't even know where it's located. when I turned the ign. key the fuel shoot up over ten feet.then when dissassembling the head seamed like the whole cylinder was filled w/ fuel.