Another New member from Mass......please help - Snowblower Forum : Snow Blower Forums
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post #1 of 39 Old 02-13-2016, 12:28 PM Thread Starter
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Another New member from Mass......please help

Good afternoon, I am a new member to this site but have been reading and following along for some time. Thanks for having such a great site. I Was wondering if you guys could help me out I am in a bit of a pickle. A friend of mine brought me an Ariens ST 727 with a tecumseh H70 Motor. The main issue is that once the throttle was increased it would over rev to the point where it sounded like it was about to snap a rod. I started off suspecting the carburetor as the machine had sat for sometime. After cleaning the Jets and reassembling the carburetor the problem stayed the same. Before I started messing with the governor linkage I wanted to make sure it was not fuel related so I replaced the carburetor with no improvement. So I then went and made sure the governor linkage was moving freely and attempted to adjust the linkage. I was able to get it to the point where upon increasing acceleration it sounded somewhat normal however as soon as I attempt to blow snow it bogs down and regains rpms when I back away from the snow which tells me perhaps I did not adjust the linkage correctly because it doesn't sound like the governor is not kicking in when it is supposed to. Am I missing something? Any suggestions? I attached a couple pictures in case something stands out to anybody. Sorry about the long-winded Post just wanted to try to be detailed. Thanks for the help and thanks again for a great site!!
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post #2 of 39 Old 02-13-2016, 01:19 PM
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to the forum Twes

Do you have anything to actually read the RPM to help you set it properly ??


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Make sure the windows are up before the snow plow goes by !!

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post #3 of 39 Old 02-13-2016, 01:38 PM
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If you need to buy a tachometer, I recently researched what to buy over on this thread..

https://www.snowblowerforum.com/forum...d-i-buy-2.html

Bottom line....

I bought one of these low cost units and ordered it from Asia. It took forever to arrive so you might want to pay the extra $2 and order it from the guy in California since you seem to have a more urgent need.

I have not used it yet... but people seem to say it's good enough.

$7.14 (approx depends on exchange rates) shipped from Hong Kong...

Digital Engine Tach Tachometer Hour Meter Inductive for Motorcycle Motor FC0 | eBay

$9.35 shipped from California...

Digital Tach Hour Meter Tachometer Gauge Spark Plugs Gas Engine Motocycle ATV | eBay

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post #4 of 39 Old 02-13-2016, 01:52 PM Thread Starter
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Thanks for the replies, I actually have a tach gauge on order. I'm just concerned I messed up somewhere because it seems to idle within a reasonable range but when I come into contact with snow it doesn't increase the engine to compensate like It usually does instead it just boggs down and returns back to speed once I back out of the snow.
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post #5 of 39 Old 02-13-2016, 02:14 PM
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Quote:
Originally Posted by Twes View Post
Thanks for the replies, I actually have a tach gauge on order. I'm just concerned I messed up somewhere because it seems to idle within a reasonable range but when I come into contact with snow it doesn't increase the engine to compensate like It usually does instead it just boggs down and returns back to speed once I back out of the snow.
I believe that symptom can also be due to fuel mixture running too lean.
Not sure but worth checking.
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post #6 of 39 Old 02-13-2016, 02:39 PM
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Sounds like you have an internal governor problem.

'77 Ariens 924032 "Brick House" Re-Powered with a TEC 10HP and oversize auger pulley
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post #7 of 39 Old 02-13-2016, 02:50 PM
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It looks to me like the governor link at the block entry point (where it screws to the shaft clamp) is at to much of an angle? They are usually a little more straight in line - but not perfectly straight. It should be canted slightly - but your looks to be to much....

Either way I think your problem lie in the governor. Watch Donny boys vid's and see what you come up with.




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post #8 of 39 Old 02-13-2016, 02:56 PM Thread Starter
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thanks for the responses. stuart80112, I set the carb to suggested factory settings but couldn't dial it in any further with the super high idle issue. Was kind of figuring/hoping a fuel mixture issue wouldn't cause such an extremely high idle (like high enough where I was afraid it was going to blow up). nt40lanman, that was my big fear , an internal governor issue. If I can manually move the governor linkage and it affects the rpms would that rule out internal damage? If not is there another way to determine without tearing the engine down?
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post #9 of 39 Old 02-13-2016, 03:00 PM Thread Starter
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thanks bad69cat , The angle your referring to seemed to steep to me as well but thats the angle i have to set it at in order for it to not idle through the roof. Can't for the life of me figure what else it might be. there's no "intake manifold" on this model or maybe i'd suspect an air intake leak . I replaced the carb gasket between the carb and the motor just to be sure.
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post #10 of 39 Old 02-13-2016, 03:22 PM
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That gov lever looks at the wrong angle to me.

The manual that can be found free online gives a procedure.


Loosen green screw. Turn and hold shaft counter clockwise with pliers. Swing the red lever in direction of blue arrow and hold there. Tighten green screw.
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