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New tecumseh carb


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#1 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 06:51 AM

Anyone of you bought one for your engine?

Looks like I'm going to have to make a spacer. If you have one, what did you make a spacer out of?

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#2 dodge trucker ONLINE  

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Posted July 25, 2015 - 08:00 AM

sure yours didnt have one? `Alot had a fat gasket, some did have an alum. spacer or an elbow ("manifold")


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#3 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 08:31 AM

Nope. No spacer.
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#4 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 08:32 AM

Can the fuel inlet come out where I can screw in the fuel pump?

#5 chris m ONLINE  

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Posted July 25, 2015 - 09:23 AM

You are missing a metal shield (engine tin) that goes behind the carb, it is important because it helps direct the air from the flywheel over the block cooling fins. It gets a gasket on both sides.

 

As far as the fitting, I haven't bought the new carb yet so I am not sure, I would think it should unscrew?


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#6 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 09:25 AM

Do you have a picture of this?

#7 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 10:06 AM

Here's the fuel inlet I was mentioning.

On my old carb the fuel pump in picture below..screws in where that metal fuel inlet piece is

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#8 classic ONLINE  

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Posted July 25, 2015 - 11:25 AM

Here is a pic of the shield you are missing. Some new replacement carbs have the fuel hose barb pressed in, so you may have to remove the barb and tap the hole with an NPT tap to install the pump. I've never done it, so I don't know if it is doable on those new carbs. Some of the Tecumseh engines had block mounted pumps, but the block has to be machined to accept it.

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#9 classic ONLINE  

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Posted July 25, 2015 - 11:35 AM

Are you working on a Sears Suburban tractor? I'm guessing due to the orange paint. You can install the carb without the pump, but the engine will starve for fuel when climbing steep grades. If you are just using the tractor on flat land, the pump isn't necessary. The old orange Suburban tractors came without pumps, with block mounted pumps, and with the carb mounted pump like yours.
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#10 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 01:14 PM

This is how I did it.

Also made a spacer out of two 1" washers

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#11 classic ONLINE  

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Posted July 25, 2015 - 01:30 PM

That should work just fine, but it's important to have the tin cover in place. You need to have cold air blowing through the fins on the engine, especially since the exhaust is right there.
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#12 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 01:38 PM

Well the walbro carb didn't have no plate on it. I thought it was fine.

What do you suggest? Get that piece?

#13 classic ONLINE  

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Posted July 25, 2015 - 01:47 PM

Yes, I would definitely get that piece. The engine block gets very hot on that side and you can overheat the engine. You could blow a head gasket and even damage the piston and rings under heavy use on a hot day. I've had many Sears Suburbans and all have the plate behind the carburetor. Someone removed yours in the past.

#14 Firefighter912 OFFLINE  

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Posted July 25, 2015 - 01:57 PM

Well I got a lot to mow and I'll probably start tomorrow. So when I start I'll make sure I'll take breaks cause its really thick grass
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#15 MH81 ONLINE  

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Posted July 25, 2015 - 02:32 PM

It would take just a little bit of time to make two or three gaskets (any good auto parts store would have rolled gasket material) and to make a piece of tin out of scrap. Short term, it could even be aluminum flashing (but I wouldn't leave it that way due to the heat)
Not knowing if you have a junk pile, scrap parts, etc... You'll just have to use your imagination.




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