I'd appreciate some troubleshooting guidance and suggestions on a problem I'm having with my round top SU's on my stock L24. I replaced the head gasket on my motor, which was running (blown gasket) when I started the teardown. It was running normally the previous day - an overheating condition (never boiled over or died) tipped me off to the head gasket.
After reassembly, I have no start. Engine cranks fine, I have good spark, and I did not do anything that would have changed the timing.
My helper and I are pretty sure I have a fuel problem within the SU's. The mechanical fuel pump is putting out a strong flow, and the bowls are getting fuel because they drain fuel when the line is disconnected. When I crank the engine, it spins freely and sounds good, but shows no sign of combustion. When we spray starting fluid into the intake and crank it over, the engine fires. We pulled the plugs after failed start attempts, and they have no fuel on them at all.
One person suggested that I try replacing the carbs, but I have a hard time believing that they would have gone bad in between the time they were running yesterday when I pulled them, and today when I put them back on.
Any and all help appreciated!