Holley 4 barrel
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Holley 4 barrel
Hi all , first post . I have a '76 F150 Explorer that has a 390 with a factory Holley 1850 I think . The list number is 6947 . Anybody know where i can get a rebuild kit for it ? Thanks for your help
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 96
From: Waterloo, Iowa
Welcome to FTE
A lot of guys recommend Mike's Carburetors, out of Washington state. The quality of the parts is better than the generic el cheapo kits from golly-knows-where, and he's pretty good about answering email if you have questions. There's some good technical resources at the website, FAQs and .PDF scans for downloading vintage carb manuals. Most carb rebuild kits have pretty sparse or incomplete instructions, to do a first class carb job takes some study and careful setup.
A lot of guys recommend Mike's Carburetors, out of Washington state. The quality of the parts is better than the generic el cheapo kits from golly-knows-where, and he's pretty good about answering email if you have questions. There's some good technical resources at the website, FAQs and .PDF scans for downloading vintage carb manuals. Most carb rebuild kits have pretty sparse or incomplete instructions, to do a first class carb job takes some study and careful setup.
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Joined: Aug 2002
Posts: 6,078
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From: Southern California
another source that I have used for years is...
Culver Carburetor Company
4921 Marine Ave
Lawndale, CA 310-679-2733 310-679-1616Typically the carb rebuild "kits" are crap- either missing critical parts or the parts don't fit or are of poor quality. What I have done that has worked very well for me is to go to a carb rebuilding shop (such as the one I listed) and ask them to put a "kit" together for me. The cost was around $50 but every part was there, fit correctly and worked!!!!
Just an FYI- The other issue is many forget to take fine sand paper, laying the carburetor block on it side on a very, very hard flat surface and gently sanding the surface.....if it’s not flat/square/smooth, it's likely slightly warped...and although it looks fine is will develop a fuel or vacume leak and won't function correctly.
Culver Carburetor Company
4921 Marine Ave
Lawndale, CA 310-679-2733 310-679-1616Typically the carb rebuild "kits" are crap- either missing critical parts or the parts don't fit or are of poor quality. What I have done that has worked very well for me is to go to a carb rebuilding shop (such as the one I listed) and ask them to put a "kit" together for me. The cost was around $50 but every part was there, fit correctly and worked!!!!
Just an FYI- The other issue is many forget to take fine sand paper, laying the carburetor block on it side on a very, very hard flat surface and gently sanding the surface.....if it’s not flat/square/smooth, it's likely slightly warped...and although it looks fine is will develop a fuel or vacume leak and won't function correctly.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 96
From: Waterloo, Iowa
That's an excellent suggestion. Plate glass is perfectly flat, or near enough.
Carb kits don't include the float, nor jets. After all these trips around the sun it's anybody's guess what has been done to some of these units. Check carefully that somebody didn't leave out any check valves or check weights and other gee-gaws.
Check the jet size (stamped) and for the possibility that they have been drilled out. Same kind of thing with power valves. They open at a certain level of engine vacuum and are supplied in ranges from 2.5 to 10.5; the rebuild kits and new carbs are generally supplied with a 6.5 pv, meaning it supplies extra fuel for acceleration at 6.5" of manifold vacuum. This is a good all around choice for a factory stock engine, BUT, it would not be suitable for a performance engine with a rumpety rumpety camshaft, nor even a stock engine at high elevation.
The generic imported power valves don't seem to last very long either, compared to Holley or Motorcraft. May be modern gasoline eats on them, I dunno.
Carb kits don't include the float, nor jets. After all these trips around the sun it's anybody's guess what has been done to some of these units. Check carefully that somebody didn't leave out any check valves or check weights and other gee-gaws.
Check the jet size (stamped) and for the possibility that they have been drilled out. Same kind of thing with power valves. They open at a certain level of engine vacuum and are supplied in ranges from 2.5 to 10.5; the rebuild kits and new carbs are generally supplied with a 6.5 pv, meaning it supplies extra fuel for acceleration at 6.5" of manifold vacuum. This is a good all around choice for a factory stock engine, BUT, it would not be suitable for a performance engine with a rumpety rumpety camshaft, nor even a stock engine at high elevation.
The generic imported power valves don't seem to last very long either, compared to Holley or Motorcraft. May be modern gasoline eats on them, I dunno.
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