Tecumseh primer knowb (Not bulb) - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 11-05-2014, 08:43 AM Thread Starter
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Tecumseh primer knowb (Not bulb)

Does anyone know the part number of the primer knob that attaches to the intake hole of the carb? This is the knob you push in that closes the intake so as to make the carb temporarily rich enough to start. Not the bulb you press in to feed it gas. There is a bracket that screws in to the two holes on the outside rim of the carb. Anyone know what I mean? If I could get a part number it would be great. Or even better, if anyone knows a supply store that might still sell them. I see them on the parts diagrams but never with a part number. I could search ebay with a part number. Thanks.

Edit. I actually have a pic of one here:

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post #2 of 7 Old 11-05-2014, 10:41 AM
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Good morning. Here are the part numbers you need for the mechanical primer you have. I personally would measure the threads on the shaft and find or make my own knob. The knob off a 3-way lamp socket may work with new threads tapped?? Most hardware stores would have the compression spring if yours is missing. I hope this helps.

Knob - 32400
Spring - 32399
Plate - 32397
Bracket - 32398
Screws - 28820

I found the numbers here-
http://www.whitesfarmsupply.com/pages/OemParts#%2fTecumseh_Power_Company%2fH35-45336H%2fEngine_Parts_List_%232%2fH35-45336H%2f1021245336H-EN

I found the knob here-



Toro 8/24 (38080) 1989
Toro 421-QZE (38585) 2008 (Gone)
Toro 721-QZR (38741) 2015 (Hemi Predator Power)

Experience is something you don't get until just after you need it.
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post #3 of 7 Old 11-05-2014, 12:09 PM
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I've had that primer in my Tec blower motor for 48 years, and I never used it, but I never had temps below 0 deg.
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post #4 of 7 Old 11-05-2014, 01:11 PM
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I gave my son-in-law a 1973 Toro which uses this system. We always set the choke to close, push the plate in, give the recoil two pulls with the ignition switch off, release the primer, turn ignition on and it starts with one pull no matter how cold. It's primitive, but it works.

Toro 8/24 (38080) 1989
Toro 421-QZE (38585) 2008 (Gone)
Toro 721-QZR (38741) 2015 (Hemi Predator Power)

Experience is something you don't get until just after you need it.
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post #5 of 7 Old 11-05-2014, 06:04 PM Thread Starter
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Quote:
Originally Posted by Grunt View Post
Good morning. Here are the part numbers you need for the mechanical primer you have. I personally would measure the threads on the shaft and find or make my own knob. The knob off a 3-way lamp socket may work with new threads tapped?? Most hardware stores would have the compression spring if yours is missing. I hope this helps.

Knob - 32400
Spring - 32399
Plate - 32397
Bracket - 32398
Screws - 28820

I found the numbers here-
http://www.whitesfarmsupply.com/pages/OemParts#%2fTecumseh_Power_Company%2fH35-45336H%2fEngine_Parts_List_%232%2fH35-45336H%2f1021245336H-EN

I found the knob here-
Tecumseh Primer Knob 32400 New | eBay
Ah thanks! That engine in the pic is mine. It works so well I just want to ad these things to a few more of my motors.
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post #6 of 7 Old 11-05-2014, 06:28 PM Thread Starter
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Quote:
Originally Posted by Grunt View Post
I gave my son-in-law a 1973 Toro which uses this system. We always set the choke to close, push the plate in, give the recoil two pulls with the ignition switch off, release the primer, turn ignition on and it starts with one pull no matter how cold. It's primitive, but it works.

Seriously. Its like when you put ur hand over the carb on a hard starting motor. Im surprised these things arent more common now that I have one.
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post #7 of 7 Old 11-05-2014, 08:42 PM
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It can be a little difficult to hold the primer in and pull the recoil at the same time, that's why WE use the procedure I described.

Toro 8/24 (38080) 1989
Toro 421-QZE (38585) 2008 (Gone)
Toro 721-QZR (38741) 2015 (Hemi Predator Power)

Experience is something you don't get until just after you need it.
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