Tecumseh Throttle linkage- - Snowblower Forum : Snow Blower Forums
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Old 01-31-2016, 03:35 PM Thread Starter
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Tecumseh Throttle linkage-

Can someone please point me in the right direction? The throttle on my vintage Toro is missing something, but I don't know what. It won't stay in the on position. Please see the video below. Is there supposed to be a spring there holding it in place? Would someone please share a picture of yours?

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Old 01-31-2016, 09:15 PM
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I think that is suppose to be a press fit and only held by friction.

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Old 01-31-2016, 09:33 PM
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I disagree... I think!

That throttle isn't exactly the same design as the one on my HMSK110 but looks somewhat similar. On that one, there's a wavy washer sandwiched in on the same pivot as the lever, which provides friction to keep it in place.

NJBoll, my suspicion is that on your engine the washer probably rusted away, allowing the lever to move freely on the pivot thingy. The problem is that the washer is not available as a separate part, and the pivot is swaged to the backing plate and it not really meant to be removed.

So probably what you're going to have to do is find a new or good used throttle assembly. Ebay is a good place to look for used ones, or if you can post the model and serial numbers of your engine we may be able to help with finding a new one.

~1994 Ariens 924084 (ST1032) "papa bear": restored, re-engined, real nice!
1991 Ariens 924050 (ST824) "mama bear"
Toro PowerCurve 1800 "baby bear"

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Old 01-31-2016, 10:21 PM Thread Starter
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This a Toro 521 model 38052
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Old 01-31-2016, 10:24 PM
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I am not sure but your throttle lever with red knob seems badly twisted, therefore you may have lost some tension that normally creates enough drag, as part of the set-up, that holds it where you put it. See thread below "Tecumseh HMSK 80 throttle position" post #10 has pic. Not quite same design as yours but with strait lever the same as mine. You are probably not missing a part.
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Old 02-02-2016, 11:59 AM
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One possibility for getting perhaps more friction in that system... ;-)

First get ride off that original bolt witch is holding the hole throttle assembly together and put in a normal screw-bolt instead. Now fix that with a washer and a lock-nut (those nuts witch are "self securing") so you can adjust the friction by tighten or loosen the lock-nut.

Now a list of all parts in direction of order how they are located on that new screw-bolt when you are looking on that assembly in the same way the video shows:

lock-nut --> washer --> throttle assembly like it is --> back plate wich is fixed at the engine --> screw-bolt head

I hope you will be able to understand my discription... itīs translated from German to English! So if there are any questions, feel free to ask

Greetings from Bavaria


Ariens ST 832, Modell No.: 924054, Serial No.: 001631, Tecumseh HM80-155207C
MTD E640F S/N: 31AE640F678, Tecumseh HMSK80-155692V
Mercedes-Benz L 406 D (1973) with Diesel-Engine OM 615 (2,2 Ltrs)
Mercedes-Benz MB 310 (1989), ex. Firebrigade Van, Gasoline-Engine M 102 (2,3 Ltrs)
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Old 02-02-2016, 12:18 PM
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Tecumseh 36677 Control Bracket
Assuming that's a 38052 , 1986 Toro 521?
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Old 02-02-2016, 12:22 PM
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Have Assembly Available. PM if interested
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