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05-22-2021, 04:08 PM | #1 |
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Join Date: Jul 2018
Location: Ottawa, Ont Canada
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y block to rich
leaned out the float still running rich
plugs are white tailpipes are black still cranks a lot when warm but will eventually start |
05-22-2021, 08:04 PM | #2 |
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Location: Ohio
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Re: y block to rich
Is the power valve blown???
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05-23-2021, 12:57 AM | #3 |
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Re: y block to rich
For 272 with Holley 2100 or similar carburator, the idle/fuel mixture screws are located on the back of the carb near the bottom. Adjust while a vacuum guage is hooked up to manifold vacuum and engine idling. Adjust screws to obtain a reading of around 19-20 on the guage and fine tune from there. Turn clockwise to lean out. Turn counterclockwise to enrichen the mixture.
Hard starting after engine has warmed up could be a number of things (carb internal leak, flooding, bad economizer valve, faulty ignition condenser breaking down under the heat). |
05-23-2021, 03:36 AM | #4 | |
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Re: y block to rich
Quote:
If it is hard to start while warm, I would look at ethanol fuel evaporation/flooding.
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05-23-2021, 11:29 AM | #5 |
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Re: y block to rich
I agree with KULTULZ. Once the tailpipe gets black, it takes forever to change. Don't go by the tailpipe. Go by the spark plugs. Sounds like if anything it may be on the lean side, but if it runs OK, I wouldn't worry.
Also, put the float back to factory specs. Lowering a float is not the way to lean out a carburetor. Also, not sure what year or carb you are talking about. Sal |
05-23-2021, 07:59 PM | #6 |
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Re: y block to rich
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05-24-2021, 04:46 AM | #7 |
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Re: y block to rich
If the no-start is found not to be fuel delivery caused, yes, a compression and leak-down test with a starter draw test.
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***** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ...
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05-29-2021, 05:05 PM | #8 |
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Re: y block to rich
Does it tend to start as you relax the key from the start position? If so that could indicate electrical related...
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