datsun 521 floods cilyndre#3

[ney]

Hi, 

I have a 1971 datsun 521, that keeps flooring cylinder #3. it had a after market carburetor (cheap one $75) and ran good for a few years. I left it parked 6 months and now runs really rough. I  replaced fuel filter, cleaned the carburetor and I noticed that cylinder #3 flooded, luckily I found an original one, I cleaned it really good and I had the same result. I checked the flood and it seams to be working properly, it only takes  a few seconds to flood the same cylinder. Can two carburetors have the same problem? or there is something else wrong.

 

I need some help 😞 😞

[datzenmike]

Maybe spark plug not firing? Gas just keeps collecting.

[Stoffregen Motorsports]

Are you sure it's not oil fouling?

[banzai510(hainz)]

this what I would do.

make sure cyl 3 has spark or a new plug there.

make sure the rocker arms are set correct.Valve lash

 

maybe a hole in the piston? Those it seem to run OK for a little bit like on all 4 before it floods/fouls out?If hole in piston plug with be soaked with oil.

dos oil look or smell like gas?

Edited September 22, 2023 by banzai510(hainz)