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andrelaplume

Noma Snowthrower question

6 years ago

ok, my 3rd project...Pop's old Noma single stage snow thrower. I believe he got the Toro we still use today in 2004. I think this sucker may be from 1996 purchased from Home Depot. I can tell it was serviced once as there is a cut out that allows access to drain the carb, perhaps even remove it. It must have died a second time and he bought the Toro. I found this in the back of the shed.

It did not start. I took the cowl off and the plastic covering the carb. My God what a PITA! I removed the carb. I cleaned it..lots of gunk in the bowl. Even the carb was a PITA...hex screws etc. I had taken some pics so putting it back on was not too bad. I did remember to connect the throttle rod(??) and placed the spring over it. That was a pain too!


Before putting the cowl and all back on, I added little gas, pulled it a few times..IT STARTED. I immediately shut it off. Why? To be honest I am no mechanic and the thought of a 20+ year old machine starting for the first time in 20 years gave me thoughts of the engine blowing up and parts flying everywhere! Why I would think the plastic cowl would protect me..I don't know. (FYI--I had a rider in the 90's whose engine blew apart while I was rding it..sounded like a gun going off.

Anyway, its all together, I pull the cord it starts on the first pull....BUT..its loud, it sounds like it on high idle, it does not seem to rev down....yes the paddles engage..it feels like a beast. I am just concerned that I did something wrong that is causing the engine to run so high, so loud..unless they were like this back then. I though perhaps the throttle connect thing came off but peaking in it appears connected. It just sounds like if you put you foot on your cars gas pedal in park but do not let go.


Any ideas...my thoughts were to donate this or give it away..but I don't want someone getting hurt.

Here she is:








Comments (22)

  • 6 years ago
    last modified: 6 years ago

    Governor control need of adjustment . Spring tweaked ?

  • 6 years ago

    okay sounds simple enough but I have no idea what you're talking about! is this is something I can do because it's definitely not worth taking in for service. how do I adjust the governor and what do I do with the spring? and if you have a picture I don't even know what the governor looks like! maybe there's a video.

  • 6 years ago

    this was the only piece I could think of that I could have screwed up and I think I put it on correctly. however in another post I did mention this little spring that people thought went on the pin in the carb bulb... now I'm wondering if that wasn't supposed to go somewhere else.

  • 6 years ago

    was a nice day so I took the beast apart again. from my original pictures I noticed one piece might have been installed upside down. it turned out it made no difference. it was a piece that connects the carb to the arm.

    The thing starts right up but, again, it sounds like if you were sitting in your car with the car in park and pressing your foot on the accelerator as far down as you can and not letting go... it's revving way too high.

    I seen nothing in here to adjust I see no missing pieces I'm not sure what I could have done wrong perhaps the thing always had an issue. I'm looking for anyone who might have any idea what's wrong. I took some close-ups ..see below.

    I can't figure out something this week I guess it's off to the trash heap which would be a shame because it does start right up.

  • 6 years ago
    last modified: 6 years ago

    on the carb, the piece which has a link connected to it - when it starts, do u see the link moving the carb piece pivoting? Move the link by hand to confirm the pivoting part (which is the throttle) move freely.

    If it moves freely but does not move when u start it, likely there is something with the governer part inside the motor.

    It would be nice if u can borrow a tachometer because maybe your idea of running too fast is its normal speed.


    If u give up on it, I would not toss it. it can be worth a few bucks on ebay.

  • 6 years ago

    I think it's free..this here right?

  • 6 years ago

    someone said maybe to bend this down? top of spring

  • 6 years ago

    Yes, that would lower its speed.

  • 6 years ago

    I will bend it. The weird thing is when it first starts for the first few seconds that runs it sounds perfectly normal and then it just gears up like it's blasting off for the Moon!

  • 6 years ago

    heading out to try in a minute by the way if this does decrease the revs should adjusting a choke make any difference at all ... prior to this adjusting a choke did not .make a difference it reved extremely high no matter what

  • 6 years ago

    so I bent the piece down that hasn't been running a few days it started it sounded good and then I fiddled around with a choke a little bit and it seem to be working but within I would say a total of 20 seconds again it just revs up like the engine was going to blow itself apart. the peace connecting the carb for the throttle never moved once and it is not stuck I checked...so I now must assume it's the governor piece and I'm going to assume that's not something for lay person to handle....?

  • 6 years ago

    FYI---in case I missed something...Here is the original pic before I removed the carb and then the pic after I reinstalled it. Did I put that spring on right? What is its purpose...In the original pic it looks like it was just hanging there. You can see in the next pic where I connected it but thinking about it..is that right? Whats the point?




  • 6 years ago

    It looks like you have the links correct.

    What you have is when it is working properly what you have is that the "L" shaped piece - with one end to the spring and other end to the carb throttle, and it pivots on a shaft. That shaft that the "L" pivots is to the governer inside the motor.

    The governer applies pressure to close the throttle and the spring on the other end applies an opposing force to open the throttle. This is your balance that sets the normal engine speed.

    When u put a load on the motor like actually throw snow(or if the governer is not working properly), the governer does not apply as much pressure to close the throttle so that the spring pulls the throttle open more "giving it more gas" to compensate the load.

    -SO-

    If I was you- you say you bent the tab and the speed slowed down, I would bend it down more. It should run alot slower now. While it is running, from the top, manually pull the link to the left to raise the speed. Let go, it should immediately return to its original speed. Try it a few times, it should bounce back quick.

    -or-

    Do u need to manually hold the link to the right and when u let go the link just wiggles drifting to the left and the speed takes off again????



    BTW don't run the motor for long. It doesn't have a shroud to cool the engine- it is setup to run in the winter to throw snow so don't let it overheat. a fan blowing on the engine fins would be good.

  • 6 years ago

    okay bent that sucker down you can see in the picture. I could tell something's wrong because I could tell it would never been been been that far down before.

    I started it. For 20 seconds it sounded normal then when normally it would start to surge a little it went into blasting off to the Moon mode. At that time I took my screwdriver and flicked the arm to the left and let it bounce back to the right. I also took the screwdriver and flipped and held it to left and slowly move it to the right and it did seem to control the revving of the engine to some degree. The problem is something inside there isn't causing that sucker to pull to the left on its own. I'm not sure how it works.

    I do recall seeing the thing moving back and forth on its own on my other snowblower when I put a Chinese carb on it that had a surging issue so I know it's supposed to move by itself it just doesn't move it all on this Noma snow blower.

    Does that mean it's the governor and is that something I even have a chance of fixing or is it best left to someone a little more in the know.

  • 6 years ago
    last modified: 6 years ago

    " or is it best left to someone a little more in the know. " No. you are almost there. If it keeps goin back to the right lowering the engine speed, the governer is doing what it is supposed to do.

    The piece i told u to bend is the throttle. Being through normal use, it stays running at X rpms, the fixed position replaces a throttle u adjust on the handle.

    As i said before - the working governer wants to push the throttle to close. The throttle- spring in this case, want to pull the throttle open. That spring is your "something inside there isn't causing that sucker to pull to the left on its own". The balace between the 2 is your speed setting.

    Now, if the governer pushes the throttle shut, it is working right so u can "unbend" the piece i told u to bend down to run the test. Bend it back up little at a time to a speed u want- unless you can get your hands on a Tachometer to set it to the exact proper speed....

  • 6 years ago

    I'm a little confused because irregardless of how low I've bent the piece down when I first start it it sounds great but after 20 seconds something happens and it just starts revving like you wouldn't believe... again the only thing I can liken it to is sitting in your car in park and pressing your foot down on the accelerator and not letting go I have not found a way to adjust that yet no matter what I've tried....other than me pushing the arm to the left and let it go I've not once seen it move by itself and I'm pretty sure I've seen it move on my other snow blower when I had it apart... what particular part would cause that arm to move to the right it seems like there's a bit of torque needed to make it move it's not like you can just flick it with your finger you got to get a screwdriver and give it a good push....

  • 6 years ago

    " but after 20 seconds something happens and it just starts revving " Then something is wrong with the governer inside the motor. I misunderstood when u stated it bounces back to the right when u pulled the throttle open - which is what it is supposed to do.

    You would need to crack open the engine to find out why it is doing this.

    As a workaround, you could add a throttle cable connected straight to the throttle so that when u hit the snow and the engine slows down, you could manually give it more gas.


  • 6 years ago

    yes sorry maybe I wasn't being specific. you start it and it sounds like it's fine for about 20 seconds. a normal snowblower would work its way up to its normal idle speed at this point. but this one turns on a dime and goes from what would be about the right idle speed 2 ' I'm going to blow the engine apart speed'.

    during this time if I take my screwdriver and push the throttle arm to the right it does seem to have some impact on the idle speed but as soon as you let go it pops back to the left by itself and we're off to the Moon again.

    I would think while the engine is running that sucker should move to the left and right itself but it never does so I'm going to guess there's something wrong with the governor inside the engine if that's what regulates that.

    I'm not sure even if I were to wire the throttle all the way to the left to try to keep it at a lower speed if that would make a difference it just wants to go go go.

    sadly something is wrong. on the bright side at least I was able to get it running hahaha.

  • 6 years ago

    Bob F. As far as carb/governor adjustment there is a small rod that rotates from the engine to the carb control arm. You need to loosen the bolt that holds the arm to that rod, Move the carb butterfly to fully open, and the small rod previously mentioned to fully open, and then tighten things down. You can watch a video on YOU TUBE about adjusting governors as well. Good luck

  • 6 years ago

    thanks John was this arm etc visible when any of the pictures I posted? I will also look for a video.

  • 6 years ago

    I looked for videos. Is this the stuff you are speaking about? I wish I could find a video w/my engine. I'd like to try to get the rode adjusted..though I have no idea how it could have become misadjusted. I suspect that gear thing broke.


    https://www.youtube.com/watch?v=XbFyGRixoGA

  • 6 years ago

    well I took a chance I loosened the horizontal bolt what the horizontal head. I assumed the rod sticking out with the slot need to be turned left or right but it was frozen in place and would not move. I soaked the whole area and WD-40 and came back later it still wouldn't move so I tightened horizontal bolt back up. I had the WD-40 out so I sprayed the linkage all over the place....even though it seemed like it was moving freely.

    For the heck of it I started it up. To my surprise the idle seem normal a little low and never took off like a bat out of hell. Further I could see the springs moving! I bent that piece back up to increase the idling. It seems fine I can see the springs moving. I wonder if something in there somewhere was stuck and after lubing it with the oil it became unstuck. Again this thing had sat in the shed probably for 10 years or more. Anyway I put the cowl on and I let it run for 10 minutes and it seems good... I can't believe it. I'm up for any comments anybody has but for now I'm feeling like I can give it away to somebody who can use it without worrying about it blowing up on them. thanks everybody.

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