The Ford Barn

38 Conv · 05-23-2016, 01:52 PM

Have 2 1949 -- 53 Merc engines and one intake carb bolt pattern has 3 bolts and the other has a 4 bolt pattern, what does this mean ---Thanks[B][B]]

V8COOPMAN · 05-23-2016, 01:58 PM

The 3-bolt is a Ford manifold. The 4-bolt is Merc. DD

51 MERC-CT · 05-23-2016, 02:40 PM

Canadian Merc. pickup truck for the 3 bolt ??

flathead 53 · 05-23-2016, 03:32 PM

the merc 4 bolt had a weird looking carb ,I think it was called a teapot carb. I have one taken off a running merc engine , also I think the rochester GM 2bbl should fit on that manifold also. hope this helps.

jack orchard · 05-23-2016, 04:12 PM

Rochester 2G or 2GC GM 2bbl will fit. Both are good carbs. With an adapter an Autolite 2100 or Motorcraft 2150 will also fit. All are good carbs.

tubman · 05-23-2016, 06:00 PM

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A "small base" 2GC (Rochester) carb will bolt onto a Merc manifold. However, the bores in the Merc manifold are quite a bit smaller than the 2GC (I think it's 1 3/16" vs 1 7/16"; I can check tomorrow). I was able to bore an aluminum Canadian Merc manifold out to 1 7/16". Everything works best if you mount the 2GC backwards on the Merc manifold.

RalphM · 05-23-2016, 09:17 PM

I've got a couple of those teapots, free to anyone looking for one.

Alaska Jim · 05-24-2016, 03:03 AM

Ralph, bring them down next time you come through Wasilla, I can use them for parts for my 51 Merc. , I am still running that style carb on it. I got back from Texas about 2 weeks ago. still getting back in the "groove" up here. had the coupe out last weekend.-----Jim

05-23-2016, 01:52 PM	#1
38 Conv Senior Member Join Date: May 2010 Location: Allentown, PA Posts: 596	Carb bolt pattern on a Merc inake Have 2 1949 -- 53 Merc engines and one intake carb bolt pattern has 3 bolts and the other has a 4 bolt pattern, what does this mean ---Thanks[B][B]]

05-23-2016, 01:58 PM	#2
V8COOPMAN Senior Member Join Date: May 2010 Location: East Shore of LAKE HOUSTON Posts: 11,115	Re: Carb bolt pattern on a Merc inake The 3-bolt is a Ford manifold. The 4-bolt is Merc. DD __________________ *Click Links Below* __ ▼ *'35-'36 W/8BA & MECHANICAL FAN* *T5 W/TORQUE TUBE*

05-23-2016, 02:40 PM	#3
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: Carb bolt pattern on a Merc inake Canadian Merc. pickup truck for the 3 bolt ?? __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

05-23-2016, 03:32 PM	#4
flathead 53 Senior Member Join Date: Jul 2011 Location: central nj Posts: 717	Re: Carb bolt pattern on a Merc inake the merc 4 bolt had a weird looking carb ,I think it was called a teapot carb. I have one taken off a running merc engine , also I think the rochester GM 2bbl should fit on that manifold also. hope this helps.

05-23-2016, 04:12 PM	#5
jack orchard Senior Member Join Date: Jun 2011 Location: summerfield florida Posts: 383	Re: Carb bolt pattern on a Merc inake Rochester 2G or 2GC GM 2bbl will fit. Both are good carbs. With an adapter an Autolite 2100 or Motorcraft 2150 will also fit. All are good carbs. __________________ Proud FNG We fixem cars. Heap Good! Last edited by jack orchard; 05-23-2016 at 04:33 PM. Reason: correct speeling

05-23-2016, 06:00 PM	#6
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,321	Re: Carb bolt pattern on a Merc inake Sponsored Links (Register now to hide all advertisements) A "small base" 2GC (Rochester) carb will bolt onto a Merc manifold. However, the bores in the Merc manifold are quite a bit smaller than the 2GC (I think it's 1 3/16" vs 1 7/16"; I can check tomorrow). I was able to bore an aluminum Canadian Merc manifold out to 1 7/16". Everything works best if you mount the 2GC backwards on the Merc manifold.

05-23-2016, 09:17 PM	#7
RalphM Senior Member Join Date: Nov 2015 Location: North Pole, Alaska Posts: 2,651	Re: Carb bolt pattern on a Merc inake I've got a couple of those teapots, free to anyone looking for one.

05-24-2016, 03:03 AM	#8
Alaska Jim Senior Member Join Date: May 2010 Location: Palmer, Alaska Posts: 1,575	Re: Carb bolt pattern on a Merc inake Ralph, bring them down next time you come through Wasilla, I can use them for parts for my 51 Merc. , I am still running that style carb on it. I got back from Texas about 2 weeks ago. still getting back in the "groove" up here. had the coupe out last weekend.-----Jim