Toro Snowblower's RPMs increase excessively when warm - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 01-30-2019, 10:28 PM Thread Starter
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Toro Snowblower's RPMs increase excessively when warm

Hi everyone!
I have a 1984 Toro 3521 with the original Tecumseh that speeds up when it warms up. When I first start it, it runs fin, and will run at a normal RPM for about 5 minutes. Then, when it is not under a load, it starts to speed up really fast. I don't think it is Wide Open Throttle, but it certainly is faster than I believe it should be. When I hit a load, it really hunkers down, and the rpms decrease, as I would expect it to. But as soon as it has no load, it speeds up. Any thoughts as to what is causing this?
Thanks in advance!
Riley

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post #2 of 7 Old 01-30-2019, 10:41 PM
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Dorked governor is about the only thing. Perhaps binding as things warm and metal expands. Check for dirt, binding, and gently clean and lube as needed . . .
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post #3 of 7 Old 01-30-2019, 10:45 PM Thread Starter
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Okay, thanks! Where do I need to clean and inspect? I do not know how to pull the engine to check the governor.

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post #4 of 7 Old 01-30-2019, 11:31 PM
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The gov arm is connected to the throttle plate on the carb via a linkage, and typically a shaft coming out of the engine block. Check those for free motion. No need to remove the engine, just likely the cover over the carb.
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post #5 of 7 Old 01-31-2019, 01:08 AM
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Lawn toro can you post a picture of your engine. The side to where the carb is located.


If you have a heater box over your carb it is underneath that....
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post #6 of 7 Old 01-31-2019, 09:54 AM Thread Starter
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Quote:
Originally Posted by SimplicitySolid22 View Post
Lawn toro can you post a picture of your engine. The side to where the carb is located.


If you have a heater box over your carb it is underneath that....

I will see what I can do for a picture. I do know where that arm is. I tried adjusting it, but maybe I did it wrong.

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post #7 of 7 Old 01-31-2019, 10:08 AM
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Quote:
Originally Posted by LawnToro View Post
I will see what I can do for a picture. I do know where that arm is. I tried adjusting it, but maybe I did it wrong.

Riley

the arm goes behind the engine front cover. as far as i know you cant adjust the old toros Governor.

all they are is a spring attached to the linkage an the other side is controlled by the air from the spinning engine flywheel.

this sounds to me like you are getting an air leak once the engine warms up you are getting air into the engine after the carburetor causing it to run lean and rpms to increase . could be seals could be the gasket after the carburetor, Head bolts might need tightened ect

Toro snow commander 7hp RTEK ...honda HS720 GC190 OHC
Toro ccr3650 6.5hp RTEK ....Ariens sno-tek 26" 208cc LCT
Ariens st824 924082 HMSK 80 ....Ariens path pro 136cc
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