The Ford Barn

Rick Leavitt · 10-30-2025, 11:33 AM

Hopefully someone can point me in the right direction. I had just rebuilt my carburetor because 1941 Merc flathead. It was bogging down when I accelerated. The jets were clogged up so I cleaned everything up and rebuilt it. Ran great for about 20 minutes. It started to get a very loud whistling sound. I discovered that the silencer was cracked. I found a replacement and installed it. Again the car ran great. I drove it around for about 10 miles and it started to bog down again when I pushed the pedal, it would idol very fine. now I'm getting a sucking / whistling sound from inside the carb. Gas tank is clean, fuel filter is clean. I removed the air cleaner to look inside the carb and the jets are working fine. It runs fine until she is really warmed up than bam sucking sound and motor bogging down. I'm completely lost. I checked the vacuum with a Vacuum gauge and she holds steady, no jumping around. Any suggestions????

10-30-2025, 11:33 AM	#1
Rick Leavitt Member Join Date: Jul 2020 Location: Pawleys Island, SC Posts: 58	Flathead boggs down Hopefully someone can point me in the right direction. I had just rebuilt my carburetor because 1941 Merc flathead. It was bogging down when I accelerated. The jets were clogged up so I cleaned everything up and rebuilt it. Ran great for about 20 minutes. It started to get a very loud whistling sound. I discovered that the silencer was cracked. I found a replacement and installed it. Again the car ran great. I drove it around for about 10 miles and it started to bog down again when I pushed the pedal, it would idol very fine. now I'm getting a sucking / whistling sound from inside the carb. Gas tank is clean, fuel filter is clean. I removed the air cleaner to look inside the carb and the jets are working fine. It runs fine until she is really warmed up than bam sucking sound and motor bogging down. I'm completely lost. I checked the vacuum with a Vacuum gauge and she holds steady, no jumping around. Any suggestions????