Penta 3.0L, which 2300 Holley carb do I have?

[Glastron175]

Engine info: 3.0GS MEFS, 3869051, SN 4012036649
My carb is a Holley 2300. Is it a 300CFM or a 500CFM. I notice that the carb kits are different number for these, depending which one I have. Also, what size is the accelerator nozzle orifice? I'm thinking of getting a larger size one to spurt more gas and see if that solves my problem of hesitation when opening the throttle. This was suggested by a race car friend of mine who works a lot with Holley carbs.

 

[Don S]

Re: Penta 3.0L, which 2300 Holley carb do I have?

I see you found your new username.

Here is the specs for your carb.

 

[Glastron175]

Re: Penta 3.0L, which 2300 Holley carb do I have?

Thanks Don. I see that it is a 500 CFM. The Holley kit I put in was for a 300 CFM. I am now wondering if the accelerator pump is different and could be my problem with the hesitation when I punch the throttle. Do you know if the 500 CFM kit has the 50 cc acc. pump? I think I have the 30 cc pump. Also thanks for getting my user name changed.

 

[Don S]

Re: Penta 3.0L, which 2300 Holley carb do I have?

I have no idea, have never compared them.
Here is a service manual link you might enjoy.

http://www.4shared.com/dir/14518190/c08a758e/EFsharing.html

 

[Glastron175]

Re: Penta 3.0L, which 2300 Holley carb do I have?

Those download manuals are great. Thanks for sharing them.

 

[insttech1]

Re: Penta 3.0L, which 2300 Holley carb do I have?

I used Holley rebuild kit #703-41 after calling Holley w/ the 80316 number off my carb....same as yours....3.0 liter 1999 GS

I also talked to a Volvo mechanic about the issue of throttle hesitation. He said it is most likely caused by a poorly operating diaphragm. Racing mech's are fine and all, but in doing some research online, and with my minimal and humble knowledge, I would suggest the correct rebuild kit first, before mod'ing to something else like bigger jets or pumps.

And Don....that spec' you posted is marvelously confusing. I don't understand why Volvo would state to back off idle screws more on one side than the other. Every reference I have, including the Holley instructions for the Marine rebuild kit that are in my lap as I type this, state to back them off equally and then adjust for best idle condition (or vacuum if you're using a gauge...). Any idea on why Volvo would say that??

Oh yeah...got my kit from summit racing for $41 shipped. Took 2 days.

Thanks!

 

[MNBrent]

Re: Penta 3.0L, which 2300 Holley carb do I have?

Insttech1, your right on as I got the same Holley rebuild kit (703-41) from summit for my 1999 80316 carb. Cant wait to get the carb off for the rebuild. Also find it strange about the Volvo unequal backoff of the idle mixture screw initial settings.

 

[Glastron175]

Re: Penta 3.0L, which 2300 Holley carb do I have?

Thanks Instetech1. I apparently used the rebuild kit for the 300 CFM instead of the 500 CFM. I wonder if the pump diagprahm is different? It looked the same as the one that came out. I also understand that the diaprahm cover is different for the 50 cc pump than that of the 30 cc pump, so I am thinking that both the 300 CFM and 500 CFM carbs use the 30 cc pump. Any thoughts on that? Also, do you think timing could cause this kind of hesitation? It runs great at any speed if I just throttle up slowly.

 

[insttech1]

Re: Penta 3.0L, which 2300 Holley carb do I have?

I don't know about the diff' between pumps. You'd have to call Holley, give them the part number off both rebuild kits, and ask them which pump comes with each, and which part number, because the documents don't have part numbers; just names. Your pump diaphragm tuning could be off as well. There's supposed to be a .015" gap at full throttle w/ the pump arm fully depressed. Mine was way off when I pulled it out. So were most of the other settings. And my carb float was way off factory recommendation. I'm no timing guru, so I'll let others chime in on that. Also, I found out that the initial holley setting of backing off idle mix screws was way too rich, so I'm now down to about 1 turn out, with some tweaks left to make on the water in gear.

And this might be redundant, but the kits come with multiple gaskets. They do make a difference, as you must ensure that you use the gaskets with the exact same passages as the originals. Some are about 1/16th inch, and the wrong gasket will cover them up. Or the right gasket turned over will do the same thing.

 

[Glastron175]

Re: Penta 3.0L, which 2300 Holley carb do I have?

The 703-30 kit that I used had a lot of gaskets that were not needed, but I was able to compare and find an identical gasket to the old ones in every case. I can't find anywhere on the Holley site to get the answer to whether the accelerator pumps in the -30 and the -41 kits are different. It seems to me that if they were, then the pump cover would not work. I hate to order yet another kit, or even the pump since it costs nearly as much as the entire kit. I think that I am going to drill out the pump nozzle orifices a little and see if a little more gas on acceleration will help solve the hesitation problem. If it doesn't help, I can always order another nozzle with the smaller orifices again. I wish I knew the size of the ones I now have. On the Holley product site, they come in about 20 sizes.

 

[insttech1]

Re: Penta 3.0L, which 2300 Holley carb do I have?

If i remember, the sizes are stamped on them. it's in code; there were four stamping on mine; numbers and letters...not as simple as just 2.5 or 3.5 though...give Holley those numbers and they can tell u what u have. Thats for the power valve,anyways. My kit did not come with new nozzles, so the old ones were clean, and went back in. I don't think this is like a car and you can go two sizes up and expect good things...

 

[shaners101]

Re: Penta 3.0L, which 2300 Holley carb do I have?

Hi,
I have a 3.0 litre GS and go a carburettor rebuild kit for the holley 2300. I need to check the serial number for the kit I have but after rebuilding the carburettor is delivering far to much fuel. Adjusting the idling screws makes no different as there is to much fuel. I have the correct jets and power value fitted. Could it be sometime in the accelerator pump that fuel is getting out of this chamber at idle. I backed off the stroke to the accelerator pump so the it didnt deliver as much fuel when it accelerated.

 

[Don S]

Re: Penta 3.0L, which 2300 Holley carb do I have?

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[jimmbo]

Re: Penta 3.0L, which 2300 Holley carb do I have?

The 500 cfm holley, which BTW flows approx 375 CFM when rated like a 4 barrel, uses the small accellerator pump. The big 50cc was used on the 650cfm 2bbl. The .015 clearance is not critical, as long as the is some clearance at WOT to prevent bent linkages.