Holley Carburator Question

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Christian
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Holley Carburator Question

Post by Christian »

Hi Guys,

I wonder if one of you might have experience with this. I have 2 Holley Carbs on my Tri-Fly. I am pretty confident they are not original. Model 3279.
20160710_082731s.jpg
20160710_082731s.jpg (145.1 KiB) Viewed 5138 times
The question I have is that there is a vacuum port open on both of my carburetors. It might be the ported vacuum for the distributor. not sure either... it is located right under to the electric choke adjuster body.
20160710_082237s.jpg
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Since the distributors does not require vacuum advance (I could not find a vacuum port on them). Shouldn't this port be capped? the way I see it, this situation will lean out the mixture at idle and at power! Not too good and difficult to adjust...

Any advice would be greatly appreciated.

Cheers,

Christian
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prowlersfish
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Re: Holley Carburator Question

Post by prowlersfish »

The port with the brass fitting is for the choke heater . If the choke is fully opening you can plug it off . Can you post a photo of the top of the carb ?( with the flame arrester off )
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mikeandanne
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Re: Holley Carburator Question

Post by mikeandanne »

Christian... the 80551 # is the holley model #, checks as a marine carb, vac secondaries 600 cfm.
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Christian
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Re: Holley Carburator Question

Post by Christian »

Thanks Prowlerfish!

At this time, this is the only picture I have. I might be able to go to the boat next weekend to take additional pictures.
"The port with the brass fitting is for the choke heater . If the choke is fully opening you can plug it off . Can you post a photo of the top of the carb ?( with the flame arrester off )" If it does not open completely, what should be done with this fitting?

Cheers,

CB
rickalan35
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Re: Holley Carburator Question

Post by rickalan35 »

HI Christian,

I may have seen your Tri-Fly earlier today around 6:15 pm,cruising past the gas dock at Rideau Ferry Harbor. I was crossing the Rideau Ferry bridge in a car at the time. Looked great.

Rick
Trojan 1994 370 Express, 502 Bluewaters
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Christian
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Re: Holley Carburator Question

Post by Christian »

Hi Rick!

Absolutely! We are enjoying her as much as we can. :lol:

Cheers!

Christian
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Christian
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Re: Holley Carburator Question

Post by Christian »

OK. I got some closeups of the carburetor. This first picture is with the engine cold and power on.
Choke On.jpg
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This second picture is after a few minute with the engine running.
Choke Off.jpg
Choke Off.jpg (156.83 KiB) Viewed 5071 times
It all looks good from that standpoint.
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Christian
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Re: Holley Carburator Question

Post by Christian »

With this said, Can I plug the Heat Tube Port next to the choke?
Open Port.jpg
Open Port.jpg (101.16 KiB) Viewed 5071 times
If I do, I am sure I should re-adjust the idle mixture screws...

Many thanks to all the feedback.

Christian
mikeandanne
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Re: Holley Carburator Question

Post by mikeandanne »

Just start the engine and see if there is vacuum at that port, if not the internal passage to the choke is not connected so no worries, leave it alone like it is, they were designed with an open tube into a well to pull heat up, but with the electric on yours appears to work correctly.....is engine idle smooth and solid ( no stalling or sputtering when you put it in gear)??
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prowlersfish
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Re: Holley Carburator Question

Post by prowlersfish »

If you have vacuum I would plug it , but its not a big deal
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
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Christian
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Re: Holley Carburator Question

Post by Christian »

Thanks guys. Just to be safe I will plug it...

Cheers,

Christian
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