Holley 750 cfm 4150 Rebuild A to Z with a Percy's Adjust-A-Jet Addition Vacuum Secondary

Pretty typical vacuum secondary Holley rebuild. Newer Holley carbs come with power valve blow out protection. This is a old carb.

[@erikturner5073]

A very light film of petroleum jelly on the gaskets will prevent gaskets from sticking. An old timer back in the 90's told me and that suggestion has served me well!!

[@rayjay6769]

Don't sell your self short on your skill set! One of the most thorough videos I've ever seen. The info on the Adjust- a- jet was a big help on figuring out which metering block, Percy's or Willy's was better. Willy's is a billet aluminum with a screw in each corner similar to an idle enrichment screw. I think it gives you a 10 jet size adjustment for each venturi. Willy's looks to be the higher quality block, but, limited in adjust-ability vs the Percy's block. I would think 10 jet sizes would probably be enough?. My 2 cents. Thank you Oldsmob455 for taking the time to make such a quality video! My hat's off to you man!

[@Oldsmob455]

10 sizes is a pretty big window if you have a rough starting point. Thanks for the comment.

[@ragercrepair9301]

Best tutorial video I've seen in a long time with a lot of good tips that most wouldn't have added. thanks very much. .... Car Smith

[@TheCanadianBubba]

Thanks for this 👍Getting into my first Holley now. Last three Q-jets I had all rotted the bleed tubes, think it is something in the gas these days.

[@Pull_It_Apart_Paul_Ham_CB]

Thankyou I have the same carbs but in the "S" version for superchargers. I will be getting the accessory bowls chromed with the large glass windows for both ends.

[@rossbkk6562]

Great video. Very helpful to a total novice like me doing a first time service / kit on a 750DP.

[@DS-bi3fz]

Very clear and concise. Very well done!

[@ALSNewsNow]

Great video. All info, no bullsheot...

[@pedrotalavera3541]

Great video. Thanks.

[@flexmarchetti]

Thank you, I got to do my first one

[@RobertSiwik1968]

Great video! Subbed!

[@Kyle_Nelson]

well done sir!

[@matthewschulze6790]

nice job

[@victorcorrea5028]

Good video Thanks

[@mrlastname3065]

I've never seen all 6 bolts in the base plate used. The center 2 aren't covered by the gasket to intake. If they come loose, they'll fall down the intake.

[@davidgoodwin658]

You have some good tips that are a nice touch. No check ball in the Vacuum canister? Summit Racing has a adjustable fuel line with built in fuel filter since the Percy block was added.

[@nd318865]

You make it look easy...

[@Crazywaffle5150]

Because it is easy.

[@Raddrobb92]

I built one like that.

[@MrBanditz28]

GREAT vid , I have been considering the Percy's , but I think I will pass :)

[@edstransitscott9186]

Where can I get a 600 Holly rebuilt, I called Holly, Said they were not doing them right now., Thanks

[@dedowd9335]

Maybe it's time for a rebuild. I've already replaced the mech. fuel pump and I'm going to install an electric fuel pump maybe as a backup or assist.

[@alonsobans1]

acabo de mandar a reconstruir mi 750 no creo que le hicieran ni la mitad de eso ya me aguite jejejeje

[@dedowd9335]

I've been having problems with my 350 Holley for over a month now on my '77 Land cruiser. When I shut it down and then start back up and climb a hill it acts like it runs out of gas. I removed the gas line to the carb and turned it over to see if gas is flowing and hook it back up and get home. Happen three times already.

[@quantumss]

Vapor lock-- maybe.

[@rossbkk6562]

What is the spray you are applying to the new gaskets? Thanks

[@sammyprestwood3182]

That's a model 3310 vacuum secondary 750 one of the best carburetors Harley ever built I could rebuild that carburetor with my eyes closed

[@Ghandisgarage]

how did that percy adjust a jet work out?

[@NAS-Performance]

AKghandi ... GREAT video. 👍👍💯💯💯💯

[@Crazywaffle5150]

You have the wrong type of float in your secondary for running jet extensions.

[@rays9033]

What would you charge to do standard rebuild for a 4150?

[@Oldsmob455]

We only work on our own stuff.

[@jperkey7089]

Ray S I love rebuilding these. Kit costs less than $50 and like a $50-$100 labor charge.

[@chrisreyes368]

That's carb only had one squirter????

[@nos1000100]

most vacuum secondaries carbs ive seen only had one squirter

[@randallcribb668]

Your list # 4778 is a 700 cfm holley

[@richardmaaske7483]

Should of changed that Plastic Float for a better brass Float.

[@stephenoverton8352]

LOL...from the way you pronounce the word "OUT", it's obvious you must be from Canada.

[@deanstevenson6527]

🥝✔️⛽