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post #1 of 6 Old 03-06-2016, 05:17 PM Thread Starter
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Carb rebuild kit?

The carb needs a rebuild on my bobcat (it's a roto hoe model) and it is a 5 hp tecumseh. The only number I can find on the engine is HS 50 67271f ser 6174b. Can't seem to find one online or a cross reference # the bob cat is a early 80s. Anybody ever come across one or seen one? Thanks

Last edited by Kiss4aFrog; 03-09-2016 at 09:50 AM. Reason: Edited for correct engine number "HS" series
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post #2 of 6 Old 03-06-2016, 05:18 PM Thread Starter
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This is the number.
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post #3 of 6 Old 03-06-2016, 06:05 PM
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Hello jb. Here is a link that shows your carb as part number 640084B and an ebay link showing how cheap you can purchase a complete carb.

Tecumseh HS50-67271F Parts Diagram for Engine Parts List #1


640084b | eBay

Your serial number 6174 indicates the engine is a 1976 or 1986. Looking at the photo, I would guess 1976???

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)
Toro 421-E (38585) 2008 (New Owner)
Experience is something you don't get until just after you need it.

Last edited by Grunt; 03-06-2016 at 06:08 PM. Reason: Add Info
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post #4 of 6 Old 03-08-2016, 09:50 PM Thread Starter
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I thought early 80s but could be wrong. Thanks for the info. Would be better off replacing the carb
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post #5 of 6 Old 03-08-2016, 10:12 PM
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Looking further at the engine parts list and not the actual engine photo, I say your motor is a 1986 model. The solid state ignition and the red throttle knob confirms this.

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)
Toro 421-E (38585) 2008 (New Owner)
Experience is something you don't get until just after you need it.
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post #6 of 6 Old 03-09-2016, 09:19 PM
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Here are some other HS50 carbs that are adjustable.

631918 carb | eBay
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