Original Holley carb on 1983 ski centurion PCM 351w ???

[shroom]

I have a 1983 ski centurion with a 351w and v-drive in it. i have owned the boat over 10 years and i love it. The problem i have on and off is vapor lock and flooding after shutting it down and parking it on the beach. The boat has a Edelbrock 1409 and i have read a lot of people with similar issues with this carb. I have heard from many people to put the holley back on it. Can anyone please tell me what came on this boat stock? I know it was a Holley but im not certain which one. I have rebuilt and tried all kinds of settings and work arounds on this edelbrock and my boat even has a pertronix electronic ignition conversion on it. on first start it fires right up after just 3 pumps of the throttle and it runs great... im sick of not knowing if i will be stuck or not. A work around that seems to work about half the time is opening the throttle wide when i shut the boat down i assume this allows the gas to evaporate off. i always leave the cowling open when i park too but bottom line is i want to go back to the Holley if anyone has any info on this i would greatly appreciate it. thank you so much.

 

[Scott Danforth]

most likely a 650 cfm 4150 with vacuum secondaries

 

[Gary H NC]

I have had similar issues with Eldebrock carbs....Worth trying the old one again if it is in decent shape.
I have had better luck Tuning the Holley carbs too.

 

[Gary H NC]

Looks like a 4160 on that boat...79 and up is what my book says. About 250 for a reman...

 

[shroom]

Thank you guys! Really appreciate it!

 

[shroom]

can anyone point me where to get one of those remans for 250?

 

[jimmbo]

New not used, or refurb but speced for ford 5.8L

Holley Part # 0-80319-1

http://documents.holley.com/catalog_holleyrev.pdf page 82


PS Don't do something stupid like using an automotive carb

 

[shroom]

just ordered a reman 80319 from national carbs thank you for all the info. The description says the fuel inlet is @ a 45 degree angle will this make any difference? I was also curious if i will need a new base plate (or manifold? not sure of terminology) or will this be bolt on hook up and go? thanks again!

 

[jimmbo]

Well, Carter/Edelbrock/Weber carbs have their fuel inlet in a different location than a Holley so some fabrication will be needed. Use of USCG approved fitting and lines is recommended. All of the fore mentioned carbs are square bore and use the same bolt pattern. Should be pretty much a bolt on and run. However, that said, you should check for signs of running lean or too rich.

 

[shroom]

got my 4160 a couple of days ago. think i understand everything i need to do to make it work on my boat but i have 1 question on the side opposite of the fuel inlet there are 2 nipples one has a sticker by it that says "fuel pump return" right next to the vacuum secondary assembly. in this picture http://mustangforums.com/forum/attac...-4160-carb.jpg there is a rubber hose on it connecting to what looks like right back on the carb I am at a complete loss as to what this hooks up to. my edelbrock has no vacuum connections on it that are used. the one nipple on the edelbrock has a stopper/cover on it. im assuming this is where i would hookup the distributor if i had a vacuum advance distributor. but what about the longer metal pipe coming out of it next to the vacuum secondary assembly.. .the sticker says fuel pump return. it is about 2-2.5 inches long. im not sure what it is or if i should plug it or what connects to it. any info would be appreciated the riser under my carb is on has a rubber line that runs to one of the head covers the other hose runs from the air intake on top of the carb to the oil cap so no problem with either of those as i will leave the riser on and not have to change that but the other two nipples im not certain. if anyone knows please let me know.



edit: on my air intake there is actually 2 hoses one that goes to the oil pump and a small vinyl one that runs back to the fuel pump... what is the small one? should this be hooked up to the fuel pump return im speaking of... on closer inspection my edelbrock does have the fuel pump return but it is blocked with a stopper should this have been hooked up to this vinyl hose that is connected to my air cleaner? maybe this was part of my vapor lock problem? at any rate im glad ive got the holley just want to make sure i hook it all up properly.

 

[jimmbo]

Well the picture on your link... I assume you are referring to your red arrow. That hose is for drawing what would be filtered air on an auto, for the auto choke. With out an actual detailed picture(s) of your carb, I'm not going to guess at anything else. Marine fuel pumps that have diaphragm must also have a way, in the event of a ruptured diaphragm a means of preventing fuel from going into the bilge. So instead of a drain at the bottom like the old car fuel pumps there is a hose that goes up to the carb and attaches to a fitting that will route any leakage into the carb.

A hose going to the oil pump from the carb? That's a new one.

 

[shroom]

yes i am talking about the arrow in that pic... should i just put a cap on that outlet? the other line that you misread as running to the oil pump actually runs to the oil cap (where you pour oil in) from the air cleaner on top of the carb so no need to reroute or change that... all that i understand. I was just uncertain about the nipple coming out where the red arrow is in that pic. seems to be a sticker on this carb labeling it "fuel pump return". the other nipple on the front in that pic it is labelled timed sparked vacuum source. i dont have a vacuum advance distro so im sure i just cap that one. only leaves the red arrow/fuel pump return as its labeled on the holley im not certain about. seems like that one on the old edelbrock just had a cap over it. it appears that the nipple runs right into the top of the carb above one of the front barrels in the carb on the same side of the carb as the secondary vacuum assembly.

 

[jimmbo]

yes the other line that you misread as running to the oil pump actually runs to the oil cap .

My mistake, I apologize. hmm two mistakes in a 24hr period....



"the nipple runs right into the top of the carb above one of the front barrels in the carb on the same side of the carb as the secondary vacuum assembly"

The hose pointed to by the red arrow looks like, it is attached to a barb/ hose fitting, near the secondary vacuum assembly , designed to draw semi filtered air, the other end of the hose appears to be attached to a fitting on the choke housing. Your carb has an electric choke, correct? If so it probably has a vent so where a hose from that barb/fitting can be attached.
Neither of my marine Holleys have a timed vacuum port, just several manifold vacuum ports. Both of them have an air inlet on the choke housing





Ok here are two holleys. These are not marine carbs. I could not find any marine carbs with the fitting/barb in that location. Do they look like yours?

 

[shroom]

it is a remanufactured carb so im sure it may use some automototive parts but is built to marine specs it is a 4160- 80319. i got it from NCI in florida. here is pics of it from every angle. no problem on misunderstanding what i typed earlier. im not the best at putting things into words. here is the link with the pictures. http://imgur.com/a/2GrmH


i notice on the sticker on the front of the carb it says "notice: the appearance of this carb may differ from the original unit but it is fully interchangable

so considering that my guess is that i should just put a plug on that nipple and the vacuum advance port nipple. you think that is correct?

 

[Redrig]

I dont think thats a marine carb , I have a holley 2 barrel and there is no vacuum lines on it at all (except the PVC) No ports or anything like on those pics. Maybe they are just "dummy" lines and not active when built to marine specs .

when you say vacuum advance , are you talking about a vacuum advance on the distributor ?

 

[jimmbo]

Yeah plug them. If you have a mechanical fuel pump, there should be a line coming from the bottom of the pump to catch fuel if the diaphragm leaks, connect that line to the that fitting.

 

[jimmbo]

I dont think thats a marine carb , I have a holley 2 barrel and there is no vacuum lines on it at all (except the PVC) No ports or anything like on those pics. Maybe they are just "dummy" lines and not active when built to marine specs .

when you say vacuum advance , are you talking about a vacuum advance on the distributor ?

It probably wasn't when it was original made. It does have the J style bowl vents, and hopefully the throttle body and throttle shafts were modified. Just one of the challenges when buying a rebuilt/remanufactured carb vs. a new carb. The OP is well aware he has no vacuum advance in his distributor. The rebuilder used a non marine metering block.

My 2bbl Holley 500cfm

My 4bbl Holley 650 cfm
spreadbore

 

[shroom]

ok. so if im getting this correctly that tube in my pics that juts out right by the vacuum secondary on the top the carb and is right above/in front barrels should run back to the fuel pump? i have a line running from the air cleaner to the fuel pump now. so if im getting you correctly i should move it from the air cleaner to the fuel pump return line on the carb and plug the outlet on top of the air cleaner?

seperate question... on the fuel inlet of the carb im going to use a brass fitting that has a nipple on it so i can connect my fuel line to it. what should i put on the brass threads to make sure it seals good? i dont think teflon tape would be a good idea due to the contact with fuel.

 

[jimmbo]

ok. so if im getting this correctly that tube in my pics that juts out right by the vacuum secondary on the top the carb and is right above/in front barrels should run back to the fuel pump? i have a line running from the air cleaner to the fuel pump now. so if im getting you correctly i should move it from the air cleaner to the fuel pump return line on the carb and plug the outlet on top of the air cleaner?

seperate question... on the fuel inlet of the carb im going to use a brass fitting that has a nipple on it so i can connect my fuel line to it. what should i put on the brass threads to make sure it seals good? i dont think teflon tape would be a good idea due to the contact with fuel.

That line you currently have running to the 'air cleaner', you say it goes to the fuel pump. Correct? Is it going to a barb type fitting?

Marine engines don't have an air cleaner, they are required to have a flame arrestor, something that will quench or cool a flame so it can't ignite any gas fumes outside of it. Most OEM looked like thin layers of metal, some look like metal mesh, a new style looks like a K&M air filter. Those might act as an air cleaner but I worry they are a source of fuel being oiled.



Fuel lines on a boat are supposed to be metal between the pump and the carb, or a other USCG approved material with approved fittings

 

[shroom]

yes its a flame arrestor... just calling it an air cleaner i didnt know the terminology yes... it goes to the barb fitting on that fuel pump from the flame arrestor. should i move it from the flame arrestor to that barb on the carborator we have been talking about the "fuel pump return". and as far as the fuel line goes i know it its supposed to be metal but the boat came stock w/ the rubber line and i have not changed it. i plan to in the future but that is how it is for now. is there something i should put on the brass threads of the fitting that screws into the fuel inlet on the carb to connect the fuel line to it? something like teflon tape but fuel proof?