Holley 4160 float valves
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=42724
Printed Date: April-29-2024 at 8:00am
Topic: Holley 4160 float valves
Posted By: WinterTurtle
Subject: Holley 4160 float valves
Date Posted: May-04-2018 at 11:33am
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The Holley kit I purchased is by and large what I need but the float needles are a different style - maybe automotive? Do I need to get the original style from somewhere (I've not been able to find the oem style) to be coast guard compliant or should I just get the new style hardware parts (below)? https://www.ebay.com/p/Carburetor-Needle-and-Seat-Holley-34-7/227398985?iid=401495790583&chn=ps&ul_ref=https%253A%252F%252Frover.ebay.com%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmpre%253Dhttps%25253A%25252F%25252Fwww.ebay.com%25252Fp%25252FCarburetor-Needle-and-Seat-Holley-34-7%25252F227398985%25253Fiid%25253D401495790583%252526chn%25253Dps%2526itemid%253D401495790583%2526targetid%253D411424375100%2526device%253Dm%2526adtype%253Dpla%2526googleloc%253D9009656%2526poi%253D%2526campaignid%253D1058341566%2526adgroupid%253D52118409775%2526rlsatarget%253Dpla-411424375100%2526abcId%253D1133866%2526merchantid%253D102016811%2526gclid%253DCj0KCQjwibDXBRCyARIsAFHp4fpBapQXfmAqN0SYxi-Xo9XTeEQOGVGo3ZyBCcy4mOpO7B9KWc2W22AaAjefEALw_wcB%2526srcrot%253D711-117182-37290-0%2526rvr_id%253D1519916052325%2526rvr_ts%253D2b55b6c71630aaa2e8b2ab1dfff94771 - new style hardware 
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Replies:
Posted By: KENO
Date Posted: May-04-2018 at 12:09pm
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You didn't buy the right kit, you bought one for a carburetor with externally adjustable floats. You can get the needle valve and seat you need separately from a variety of places. If you bought the stuff in your link, you'd still need to buy new float bowls to go with those parts. |
Posted By: WinterTurtle
Date Posted: May-04-2018 at 1:22pm
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I'm not certain I follow. The top item in the picture is the new externally adjustable one. The next two below that are original externally adjustable ones - or at least the ones I removed from the carb that was on the motor. I believe the new would work but the seals and lock nut are different and not compatible. I also cannot find a source from holley web page or otherwise for the original style. Are these supposed to be internally adjustable float valves only? My kit also came with a couple of a very different style which I was speculating looked like internally adjustable. I think I need different hardware for those as well. |
Posted By: MourningWood
Date Posted: May-04-2018 at 1:36pm
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Is it possible the item in the top (and bottom) of your photo is an INternally adjustable n/s. ------------- 1994 Ski Nautique "Riot" 1964 Dunphy X-55 "One 'N Dun" 'I measured twice, cut three times, and it's still too short!" |
Posted By: WinterTurtle
Date Posted: May-04-2018 at 1:39pm
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Yeah I can't even find a picture of the style that was installed originally on my carb -- I'm assuming an old aftermarket part. I am also seeing the welch plugged versions of the 4160 online installed on PCM motors. So does USCG dictate they must be internal / plugged? I did find pictures of marine carbs with the candy cane vents that had external adjustments... How about the sight holes -- are those ok on the water? |
Posted By: WinterTurtle
Date Posted: May-04-2018 at 1:44pm
The top part I think is a different version of what is in the below picture. Mine has the threading for this style in the 4160 bowl casting. The hardware for this float style also came in the pack -- Sounds like this is what the original carb came with. 
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Posted By: KENO
Date Posted: May-04-2018 at 2:45pm
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Now I'm beginning to understand what you're saying. You have externally adjustable floats and the new needle and seat assembly look different and you think they might work............or maybe not. And the problem is that the threaded area is a different diameter? Your last picture on the bottom is the internally adjustable type that came along later. I'll have to look at some pieces parts to see what I have, but there are definitely still kits around with the right threads on the assembly. |
Posted By: KENO
Date Posted: May-04-2018 at 3:38pm
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I looked at my pile of externally adjustable needle and seat assemblies. They're the same as what came in your kit, (The top and bottom ones in your first picture) If the new one screws into the bowl, then the adjusting nut and screw you linked to on EBAY earlier should solve your problem unless you have some weird bowls too. I'm not sure I've ever seen one of those really thick adjusting nuts like you have. I'd put a picture here but I'm kinda challenged by this version of the forum that doesn't have Keith's custom touches. What's the list number on your carburetor? |
Posted By: KENO
Date Posted: May-05-2018 at 9:03am
Here's a picture of the needle and seat with the adjusting nut and lockscrew
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