Merc 470 carb

[dn010]

Hey guys, been a long time since I posted. My '79 Merc 470 has Rochester 2gc carb on it- the number on it is 17057132 086. My question is, what does this cross reference to auto wise? All I need is a new float, needle and seat! Would seem like a lot of money to buy a whole rebuilt kit just for a few things, plus I was hoping to install tomorrow so I could do a little shark fishing. Any advice - greatly appreciated! Thank guys.

 

[CobiaXL]

Re: Merc 470 carb

These guys had my parts at my doorstep next day at no extra charge.Prolly 2 day for you being down in fl.
Needle and seat---> http://quadrajetparts.com/rochester-2bbl-parts-needle-seats-c-72_90.html
Floats are pretty common but still match yours up---> http://quadrajetparts.com/rochester-2bbl-parts-floats-c-72_74.html
Each page has vehicles that parts were used on...
Match yours up...Good luck

 

[Don S]

Re: Merc 470 carb

All I need is a new float, needle and seat! Would seem like a lot of money to buy a whole rebuilt kit just for a few things,

If you have to replace the needle and seat, and the float, you obviously need a complete rebuild. Besides, you will probably destroy the top gasket getting it apart to replace the float.
Do the job right.

PS: If you take your carb numbers to NAPA, they should have the parts.

 

[Greg Gessler]

Re: Merc 470 carb

Make sure you use an ethanol resistant accelerator pump. Old style pumps are a source for alot of Carb problems.

 

[Bamaman1]

Re: Merc 470 carb

Last time I rebuilt my 1980 Mercruiser 470 carb, the carb kit was for a 1967 Chevy Impala with a 307 engine.

Who ever said Mercury was slow to make changes?

 

[dn010]

Re: Merc 470 carb

Ah, forgot to finish this thread out! I ended up with a carb kit & float for a '78 Pontiac Firebird from Napa.... Exactly what I needed, carb is like new - and was considerably less then the "marine" 3.7 rebuild kit. Thanks for all the help here!

 

[a1nowell]

Re: Merc 470 carb

dn010
Would you post that kit manufacturer and number, pleas.

 

[dn010]

Re: Merc 470 carb

Sure, I will post it as soon as I get home and get the numbers off of the box.

 

[cr2k]

Re: Merc 470 carb

Did you take the spring off of the old accelerator pump and use on the new one? This is important as the auto springs are softer.

 

[dn010]

Re: Merc 470 carb

I'm not sure the new kit had a spring, which forced me to use my old one...

 

[dn010]

Re: Merc 470 carb

Float was # CRB 2477, and the kit was # CRB 25731. These are both NAPA / Echlin kits. The only issue with the NAPA carb kit I got is that the base gasket only had 2 mounting holes - not four - and it didn't matter to me because I have a few extra ones. If I were to order again, I'd get CRB 25628 because it has the gasket with 4 holes. Go to napaonline.com and research it. If you go to autozone or advance and ask for a carburetor gasket set for a '78 Pontiac Firebird with a 3.8L 231 V6, you'll also find the same kits. Through them, GP Sorensen's float # is 779-1733 and carb kit # 96-357. These kits should be in the $20 range instead of $50+

 

[dccordell]

Re: Merc 470 carb

Thanks for posting those numbers... kits aren't always in stock at our local merc shop, so that's good to know what the Napa numbers are for them.