hard start after warmed up?

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hard start after warmed up?

Post  stanggt on May 13th 2012, 8:39 pm

after i fire this 351c it starts hard as if it floods some gas after I shut it down. And u see the smoke rolling out of the carb after shut down also which makes me think either the carb is bleeding some fuel after shut down or its just to rich to begin with. its a holley 1000cfm 4150. thoughts or q's?
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Re: hard start after warmed up?

Post  BOSS 429 on May 13th 2012, 8:48 pm

check float level


start engine,let it warm up,then shut it down, with ing power off ,turn on fuel pump and quickly look down carb with pump running and watch for 3 to 5 mins for fuel dripping


smoke comming from the carb normal if t/blades are open a little on a sometimes hot engine


if you see fuel dripping check float level
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Re: hard start after warmed up?

Post  stanggt on May 13th 2012, 8:58 pm

float level is at bottom of clear sight plug
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Re: hard start after warmed up?

Post  BOSS 429 on May 13th 2012, 9:00 pm

ok, now do the test i posted
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Re: hard start after warmed up?

Post  cool40 on May 13th 2012, 9:17 pm

power valve leak? i had a 1050 years ago that would flood like hell at start up cold but after it warmed up it was fine.the bowl screws had been over tq'd and pulled the corners of the carb body.this caused fuel to leak from between the metering plate and body through the vac port for the power valve.i put the body on a mill and flycut it flat and all was good. Smile is the carb dry after it sets a day or two?
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Re: hard start after warmed up?

Post  stanggt on May 14th 2012, 11:42 am

BOSS 429 wrote:ok, now do the test i posted
ok,i will try that today
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