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post #1 of 7 Old 03-31-2015, 11:36 PM Thread Starter
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Quick carb question

My Ariens has no primer, I just received a nice carb for a small Tecumseh it's got the plastic float, no line for the primer bulb, the person said it was $89, I do see carbs with brass floats for $20 and I have one with the primer nipple, so what's the difference with the plastic float and why are they more money. Should I use it over the older one with the primer ???
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post #2 of 7 Old 03-31-2015, 11:54 PM
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All of the new floats are plastic.
Not sure I follow what you mean by your machine not having a primer, and the new carb not having a primer. What's the problem?

I bought an OEM Tecumseh carb for my 8HP HMSK engine for around $75. A lot think I'm nuts but it sure is made a lot nicer than a $20 one. It too has a plastic float.

Can you post pictures of what you're asking about? It may help.

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post #3 of 7 Old 04-01-2015, 07:50 AM
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Most importantly you've asked a question without adding the most important information that's needed to answer your question.

What engine ?? Without knowing the engine model and serial everything is a guess including if the carb with the primer nipple is the right carb to begin with.

What carb numbers ?? Once we know exactly which engine you have we can find out what carb it should have and what substitutions might be acceptable.

The material the float is made out of isn't as likely a cause of the carbs cost difference as is the fact they are different carbs.

Since one has the primer nipple for cold weather and the other doesn't they are for different applications, might be jetted differently, might even be different manufacturers and could have different supply and demand.

The other thing is strictly profit. The new style gas cap for some engines can be had for around $5 bucks but there are also other suppliers selling it for up to $25 bucks, all found on ebay. Exact same cap comes in the same box. Might be the $89 carb can be had for $20 and that person just didn't shop around.

Just not enough information to have any clue what's going on.

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post #4 of 7 Old 04-01-2015, 09:40 AM Thread Starter
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Ok my Ariens is the 20000 hs40 4hp
It has a push flap over intake u close and put the start to suck fuel into the chamber, crude setup from 1970
The newer carb is from craftsman 4/21 single stage I beleve its the 631304b
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post #5 of 7 Old 04-01-2015, 09:42 AM Thread Starter
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Came off this
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post #6 of 7 Old 04-01-2015, 01:44 PM
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Same carb design that's on the HS50 on my 1973 Ariens. Yes, there's no primer bulb. There should be a push valve in front of the carb for priming it in cold weather. It's really like another choke plate.
As for the float, a brass float can have the solder fail and the float fills and sinks. That's why most floats now are plastic.

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post #7 of 7 Old 04-02-2015, 08:38 AM Thread Starter
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Quote:
Originally Posted by ChrisJ View Post

I bought an OEM Tecumseh carb for my 8HP HMSK engine for around $75. A lot think I'm nuts but it sure is made a lot nicer than a $20 one. It too has a plastic float
Yes this is what I was thinking its a differant product this was also oem
Guess it's manufactured to a higher tolerance funny no primer thou the 4/21 had one here is a photo of the actual carb, still not sure if it's compatible looks can be deceiving
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