Tecumseh HMSK80 throttle control and carb issues - Snowblower Forum : Snow Blower Forums
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post #1 of 1 Old 12-13-2014, 09:19 PM Thread Starter
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Tecumseh HMSK80 throttle control and carb issues

Hi All,

I finally got the Ariens put back together today and the snowblower side of things is looking awesome and everything works perfectly.

However, I'm still having carb and throttle issues. I tried installing a new carb I bought off of Amazon and am not impressed, at all. I purposely bought one for an older engine than mine so I could get the idle and main jet mixture adjustments, but no matter what I did it seemed to slowly load up idling and then billow black smoke when you opened the throttle up. Leaning out the main jet made it run bad at higher rpms and I even tried lowering the float level 3 times and that didn't help so I gave up and put some time into my original carb. I'm assuming the $20 Chinese carb is the problem. Now, some dope (me) slightly crushed the idle mixture jet, I guess it'd be called? So I found the needle screw from the new carb plus o ring actually fit my carb so that's installed for now. Right now, not sure what I'm going to do with the carb situation other than rebuilding the original and keeping the idle mixture adjustment is tempting. Either that, or buying a new OEM carb because the cheap ones from what I've seen are, well, cheap.

Next issue, throttle.
So my throttle control seems messed up. I have no idea what the previous owner did to it, but best I can tell the lever never applies pressure to the linkage until it's practically all the way up. The last tiny bit of travel it gives a little push. You can see this by watching the little screw, it's not even near the piece it pushes against until the very end.

From what I see, I'm guessing it should give a push from almost all the way down and progressively put more and more pressure on it, rather than just a tiny bump at the end?

I see I can buy a new OEM throttle for around $30. My question is, do I go that route or is this something that is obvious and easy to fix, like a spring slipped or something?

If I typed something that seems really stupid, cut me some slack. I'm really tired after working all day.

Thank you for your time!

Last edited by ChrisJ; 12-13-2014 at 09:24 PM.
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