926103 13 HP high revving under load - Snowblower Forum : Snow Blower Forums
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post #1 of 14 Old 02-16-2015, 10:03 AM Thread Starter
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926103 13 HP high revving under load

On a couple of occasions (very infrequently overall) I've noticed under heavy load my ariens will start revving high. I haven't been able to isolate the problem as it was happening because I've brought in the machine each time, l shut it down for 30 minutes, then would be back to normal after I re-start it. It normally runs great, idles normally, starts right up etc. I'm looking for possible causes to look out for. It has a 13 HP tecumseh ohsk 80-130

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Last edited by bleexblox; 02-16-2015 at 04:49 PM.
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post #2 of 14 Old 02-16-2015, 10:12 AM
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Welcome to SBF bleexblox!

It's usually the opposite problem under load when an engine starts going beyond it's prime.

Has anyone monkeyed with the governor arm recently? Sometimes folks will adjust the governor arm "by ear"...and when the engine isn't yet at operating temperatures. Then when the engine warms, it's overcompensating the throttle when the cam slows from load.


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post #3 of 14 Old 02-16-2015, 10:17 AM
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We don't have an OHV service manual posted on the site yet.

I found one with a quick google search.

Page-23 (it's the same procedure as an L-head engine):
Quote:

GOVERNOR ADJUSTMENT
With the engine stopped, loosen the screw holding the governor lever to the governor shaft clamp. Push the
governor lever to move the carburetor throttle plate to the wide open position. Rotate the governor clamp
counterclockwise on all overhead valve engines covered in this manual. Hold the lever and clamp in this
position while tightening the screw (diag. 2).


I strongly recommend having a tachometer for doing any governor adjustments...it would be nice to have mounted permanently; I have a


on all of my engines.


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post #4 of 14 Old 02-16-2015, 10:21 AM Thread Starter
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No, I've seen dannyboy's ( i think that's his name) videos to see what "normal" linkages look like and all appear normal. Odd because it runs great 90% of the time. I'll tweak the governor as you pointed out. For what it's worth the governor arm position looks stock to me, slight angle toward the carb side

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post #5 of 14 Old 02-16-2015, 10:33 AM
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Quote:
Originally Posted by bleexblox View Post
No, I've seen dannyboy's ( i think that's his name) videos to see what "normal" linkages look like and all appear normal. Odd because it runs great 90% of the time. I'll tweak the governor as you pointed out. For what it's worth the governor arm position looks stock to me, slight angle toward the carb side

Great forum glad to be here..
I love doneboy videos...except that one. doneboy is the MAN for fixing anything with a combustion engine... however moving the governor arm to adjust RPMs is asking for a hole in the side of your block.

This forum is unbelievable!


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post #6 of 14 Old 02-16-2015, 10:54 AM
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Quote:
Originally Posted by classiccat View Post
We don't have an OHV service manual posted on the site yet.
Here is a link to the Tecumseh OHV manual if anyone needs it. Maybe one of the moderators could make it a sticky.


http://www.barrettsmallengine.com/ma...alvemanual.pdf

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post #7 of 14 Old 02-16-2015, 11:44 AM
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If it works fine most of the time don't mess with it. My guess is your linkages are getting gummed up from dirt and grime or frozen with ice. When you run into deep snow the governor opens the throttle to give it more power, but when you clear the heavy load the return springs are not pulling the throttle back down.

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post #8 of 14 Old 02-16-2015, 01:38 PM
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Quote:
Originally Posted by Shryp View Post
If it works fine most of the time don't mess with it. My guess is your linkages are getting gummed up from dirt and grime or frozen with ice. When you run into deep snow the governor opens the throttle to give it more power, but when you clear the heavy load the return springs are not pulling the throttle back down.
Good point there Shyrp!

Maybe it just needs a little MMO on the throttle assy / spring?
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post #9 of 14 Old 02-16-2015, 04:43 PM Thread Starter
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Quote:
Originally Posted by Shryp View Post
If it works fine most of the time don't mess with it. My guess is your linkages are getting gummed up from dirt and grime or frozen with ice. When you run into deep snow the governor opens the throttle to give it more power, but when you clear the heavy load the return springs are not pulling the throttle back down.
Good thought, it could definitely be the reason because the couple of times I ran into this situation I was going through large drifts at the end of the driveway. Snow could have definitely made it in there.

So based on your theory the max engine speed can go beyond what I would normally experience with the throttle lever wide open if snow, gunk etc. were to get into the linkages? I ask because when it over revved it was definitely revving beyond what I normally hear at idle with the throttle lever at max.
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post #10 of 14 Old 02-16-2015, 04:48 PM
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There is no such thing as a 932106 and I'd doubt you'd want a 13hp compact
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