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  •  » Starting issues

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    9/07/2021 5:27 AM  #26

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,498

    Re: Starting issues

    Its stuff like this that's my biggest gripe about the old Autolites.  The carbs themselves were fine, but they've been out of production for so long that the replacement parts are no longer OE quality, leading you to chase an issue that the new parts actually caused.  Ultimately this an ease of tuning is why my Autolite is on a shelf and an Edelbrock is under my hood.  Glad you got is sorted out.  Also glad you knew not to throw out the old parts!

     

    9/07/2021 5:42 AM  #27

    Toploader
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    Registered: 4/15/2013
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    Re: Starting issues

    I wanted to double check my fuel levels in the float bowls one more time... What do you guys find to be the best? Does anyone have a shop manual that refers to wet levels for a 289?
    Mines currently at about .93" or so, but that might be a little too low?
    Thanks

    Last edited by Toploader (9/07/2021 5:43 AM)

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
       •Thread Starter
     

    9/07/2021 10:26 AM  #28

    Bolted to Floor
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    From: Houston, Texas
    Registered: 4/01/2013
    Posts: 2,016

    Re: Starting issues

    Glad you got it figured out. 

    John  -- 67 Mustang Coupe 390 5 speed
     

    9/07/2021 11:28 AM  #29

    Rudi
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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
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    Re: Starting issues

    Toploader wrote:

    I wanted to double check my fuel levels in the float bowls one more time... What do you guys find to be the best? Does anyone have a shop manual that refers to wet levels for a 289?
    Mines currently at about .93" or so, but that might be a little too low?
    Thanks

     
    .930 seems way low, where did you get that number from? Is that carb original to that engine?

    According to the chart I googled for a 65-289 the primary and secondary is 29/64” ( .453” )

    For a 66-289 primary is 1/2” (.500”) secondary is 5/8” (.625”)

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    9/07/2021 2:09 PM  #30

    Toploader
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    Re: Starting issues

    The information seems to be all over the place...
    I'm also seeing for an early 1964 289, the setting is 21/32".
    The carburettor is original to the car and my car was manufactured in 1964.

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
       •Thread Starter
     

    9/07/2021 3:39 PM  #31

    Rudi
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    From: Stuck in the 50's Welland Ca
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    Re: Starting issues

    I have not rebuilt a carb in many years but the kits used to come with a float level gauge.

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    9/07/2021 4:49 PM  #32

    Rudi
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    From: Stuck in the 50's Welland Ca
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    Re: Starting issues

    Carburetor-parts.com has a 4100 rebuild write up and video with a list of correct float level measurements.

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    9/07/2021 4:59 PM  #33

    Toploader
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    Re: Starting issues

    I ended up setting the floats by the 21/32" measurement.
    In reality, my floats are sitting at .67" and the fuel is sitting at .79". I checked all this with the engine running and shut off.
    It seems good and the fuel is just below the rubber overflow.
    I rechecked the air/fuel mixture and the engine is running nice, so I think I will leave well enough alone and just enjoy driving.
    Thanks for the advice everyone.

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
       •Thread Starter
     

    9/07/2021 5:03 PM  #34

    Toploader
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    Re: Starting issues

    TKOPerformance wrote:

    Its stuff like this that's my biggest gripe about the old Autolites.  The carbs themselves were fine, but they've been out of production for so long that the replacement parts are no longer OE quality, leading you to chase an issue that the new parts actually caused.  Ultimately this an ease of tuning is why my Autolite is on a shelf and an Edelbrock is under my hood.  Glad you got is sorted out.  Also glad you knew not to throw out the old parts!

    I tend to agree TKO. I remember speaking to Jon years ago when I was making a decision on what carburettor and he simply convinced me that Autolite was the best as Ford designed it for my set up with the engine. I do love the Autolite and hope it keeps going for years to come, but I think there will come a day when I might need to jump ship and they say that the Summit Carb is the next best thing if you like Autolite Carbs.

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
       •Thread Starter
     

    9/08/2021 10:36 AM  #35

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
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    Re: Starting issues

    I have the 66 Mustang Ford Shop Manual.  It indicates the 'wet' float level should be 0.25" below the level of the main body with the top plate removed.
    Send a PM with your email and I'll send you the few pages from the manual of both 'dry' and 'wet' settings.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    9/08/2021 4:41 PM  #36

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,256

    Re: Starting issues

    I set them the same way I set a Holley float. Turn the carb upside down and set it where float is level with the top surface of the carb.  Seems to work perfect every time. 

    Just another of my methods that does not rely on a chart or instructions.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/10/2021 4:41 AM  #37

    Toploader
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    Re: Starting issues

    I think if I set the floats .25" below the top surface, it would flood. I ended up using the 21/32" measurement and the fuel level sits just below the bypass/overflow. I thought that looked good to me.

    Last edited by Toploader (9/10/2021 4:42 AM)

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
       •Thread Starter
     

    9/10/2021 8:28 AM  #38

    oldracer17
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    Registered: 10/18/2013
    Posts: 14

    Re: Starting issues

    I think that the umbrella valve is the problem. the valve under the accelerator pump is most likely  leaking.  Just my 2 Cents

     

    9/14/2021 12:57 AM  #39

    Toploader
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    Re: Starting issues

    oldracer17 wrote:

    I think that the umbrella valve is the problem. the valve under the accelerator pump is most likely  leaking.  Just my 2 Cents

    I'm pretty certain it was the float valves, but will monitor how things go.

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
       •Thread Starter
     

    9/15/2021 6:34 PM  #40

    Mach1Driver
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    Registered: 7/16/2021
    Posts: 126

    Re: Starting issues

    Always glad to hear positive results 

     

     

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