Author Topic: 17059286 0977 marine carb  (Read 3335 times)

Offline Hotrodssnova

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17059286 0977 marine carb
« on: May 31, 2017, 04:38:41 PM »
I tried to post about this carb back when the site crashed and, here I am again. Bought a marine 350 from pan to carb, completely rebuilt now.
Specs:
9.1:1 compression
Stock dual plane intake
Cam is a .470 lift on 110 lobe centers
Duration is 275 intake/ 285 exhaust
At 0.050.    221 intake/ 231 exhaust
Exhaust will be 15/8" headers thru mufflers
Gearing is 3.56 front and rear with 31" tires
This is going in a 81 jeep cj5 with a 4 speed manual transmission

I was thinking a stock rebuild on the carb should work good. I read here that cliff dropped one on his ventura, and ran perfectly.

Thoughts?


Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #1 on: June 02, 2017, 04:39:33 PM »

Offline Frank400

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Re: 17059286 0977 marine carb
« Reply #2 on: June 02, 2017, 10:42:47 PM »
Won't exactly be a stock rebuild but if you buy your parts from Cliff, he'll guide you thru what needs to be done to the carb to make it work right with your combo.

   With that cam, one thing's for sure, the idle system will need to get addressed.  You'll need to remove the idle tubes for sure.

    Frank.

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #3 on: June 03, 2017, 08:13:09 AM »
Thanks, Frank.  I haven't opened the carb yet. Might tackle that tomorrow.

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #4 on: June 06, 2017, 06:45:00 AM »
After a ton of reading here, how can I tell if this is a reman carb or original? I still haven't had the time to take it apart yet.

Offline Ethan1

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Re: 17059286 0977 marine carb
« Reply #5 on: June 06, 2017, 10:44:58 AM »
 I believe it's a reman unit as per the date code. Kind of hard to decipher the date code but it looks like the 97th day of 1987 for a 1979 Qjet. Is there any sticker on it or what is left of one? It uses torx screws as well. Wasn't that used on reman or wasn't used until the early-to-mid 80s? Or were they ALWAYS phillips head?
Ethan

1972 Chevelle

(oo______oo)

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #6 on: June 06, 2017, 03:21:08 PM »
No stickers or resudue of one. No play in the shafts and no marks on the torx screws either. I guess I will have to open it up and see what's in it.
Really need to get some of those tiny bits like in the book to measure and drill with.

The engine won't get put in the jeep till fall,  so I have some time.

Offline Cliff Ruggles

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Re: 17059286 0977 marine carb
« Reply #7 on: June 07, 2017, 04:07:15 AM »
There are a few drawbacks using a Marine carb in an automotive application.  They lack vacuum ports for the distributor, and are set up for a Marine application.

Marine engines are heavily loaded most of their lives, so require a LOT more fuel than an automotive engine. 

You can add a vacuum port for the distributor, and recalibrate for the engine you've built.  Going to need a good bit of idle fuel as that cam is pretty "hefty" for 350cid at that compression ratio, and tight LSA, so it's going to have a "weak" signal at idle speed.

We can help out with everything you need to build the carb and set it up for what you are doing, no problem there.....Cliff

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #8 on: June 07, 2017, 04:50:59 AM »
Thanks, Cliff.  I will be giving you a call after vacation. You are 100% correct about the vacuum ports. Looks like a simple fix on that. Still rereading your book. There's a ton of info to absorb.

Offline Cliff Ruggles

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Re: 17059286 0977 marine carb
« Reply #9 on: June 07, 2017, 07:52:27 PM »
It's quite easy to add a manifold vacuum port, but a bit more difficult if you want ported distributor vacuum as the source location must be very precisely located above the throttle plates to it's adding nothing at idle but all in with the slightest movement of the throttle right off idle.....Cliff

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #10 on: September 22, 2017, 11:05:48 AM »
I'm back with more questions.  I recently acquired a different cab for my project.
This carb has the following:
17059253 3228 BZA
K hanger with 'CH' rods
40K on the primary  rods
73 on the jets
Would this be a better carb for what i have listed above? I know for sure it will need the shaft kit and the rebuild kit.  It has the nytro float.
Thanks

Offline Cliff Ruggles

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Re: 17059286 0977 marine carb
« Reply #11 on: September 23, 2017, 02:37:57 AM »
Light years better than the Marine unit.

Someone has been in that carb however, as none of the metering rods being used are correct for it, or even close for what you are doing.

The later carb will convert easily to electric choke, has the later APT system, bigger cfm and overall a much better unit everyplace.....Cliff

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #12 on: September 23, 2017, 04:25:42 AM »
Thanks, Cliff. I guess I will need a starting point for the rods and jets for this setup. Been years since i tuned a carb, and it was holleys back then.

Offline Hotrodssnova

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Re: 17059286 0977 marine carb
« Reply #13 on: September 23, 2017, 08:12:21 AM »
Found these specs here I believe from Ethan:
17059253 Primary Jets .073", 55P Primary Metering Rods, "K" Secondary Hanger, and CV Secondary Metering Rods.

So the jets are good to go for this carb, but i will need to get the proper rods. I'll check my parts bin and see what I have.

Offline Ethan1

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Re: 17059286 0977 marine carb
« Reply #14 on: September 23, 2017, 11:26:13 AM »
Found these specs here I believe from Ethan:
17059253 Primary Jets .073", 55P Primary Metering Rods, "K" Secondary Hanger, and CV Secondary Metering Rods.

So the jets are good to go for this carb, but i will need to get the proper rods. I'll check my parts bin and see what I have.

 Those are the correct stock specs bud as, Cliff, mentioned.
Ethan

1972 Chevelle

(oo______oo)