Holley Carb Rebuild
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=2313
Printed Date: November-23-2024 at 4:03am
Topic: Holley Carb Rebuild
Posted By: Kevin's '79
Subject: Holley Carb Rebuild
Date Posted: August-23-2005 at 12:17pm
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How hard is it to rebuild a Holley 4160 Carb? What are the tricks to insure that the rebuild is good and the carb functions properly? I have never rebuilt a carb. I appreciate any help and advice.
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Replies:
Posted By: David F
Date Posted: August-23-2005 at 12:54pm
It is easy. The "tricks" are:
1) Disassemble everything EXCEPT the throttle plates from the throttle shaft. Pay attention to how it comes apart. Count number of turns to seat idle mixture screws. Note position of fuel bowl floats prior to removing float or needle valve.
2) Thouroughly clean every single part in carb cleaner.
3) Rinse the parts completely and blow out all passages with compressed air.
4) Put it back together exactly how it came apart. Adjust idle mixture screws exactly as they were. Ensure float position is exactly as it was before disassemble.
Most rebuild kits come with exploded views and specs on setting pump lever gaps, etc.
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Posted By: pmt2234
Date Posted: August-23-2005 at 4:12pm
I did this a few years ago for the first time. As I disassembled each subassembly, I put all the related parts into a ziplock with a note that described how they went together. It took me about 7-8 evenings after dinner to complete it, but I'm pretty slow and careful.
Getting a book with some pictures might be helpful too, I had one that I was able to reference here and there that helped.
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Posted By: skyhawkflyer
Date Posted: August-23-2005 at 4:38pm
The Holley website has a Marine Carburator rebuild book in books section for sale.
I used laquer thinner to clean my carb (which Holley approves). It seems to dislove the gaskets better than ordinary carb cleaner.
If you have to do any gasket scraping don't use anything metal. It's very easy to damage the metal, or scratch it. Instead, use a grinder and shape a good quality plastic knife into the shape needed to do the job. Or better yet make some scrapers out of plexiglass, they last longer.
Spray your new gaskets with silicone. They won't stick like the originals.
Grind an old common screwdriver to shape for removeal of the clutch heads screws under the back fuel bowl (metering plate)
Use a #65 powervalve,
Know what's wrong with your carburator. Is the choke sticking? Does it have a terrible idle? The secondaries won't kick in? Floods easy? When you disassemble the carburator look for what is causing the problem. Find a ruptured diaphram, or a powervalve that's loose, or has a cracked diaphram, or a gummed up needle and seat. Find the problem. If you can't find it, chances are when you put it back together you'll have the same thing you started with. I sometimes look at parts with a magnafying glass, parts that look good to the naked eye sometimes don't look as good under a magnafying glass. Some of the books also tell you what to look for for certain carburator problems. Good Luck!!!!
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Posted By: Kevin's '79
Date Posted: August-23-2005 at 11:47pm
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Through additional troubleshooting tonight I determined that the problem is with the distributor and not the carb. See my other topic "90 Ski Nautique not firing properly". Thanks for the tips on carb rebuild. I may need them in the future.
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