Question on smoke

[cadzag72]

I'm sure if you throttle up slowly you don't get that smoke. The engine just gets more fuel than it knows what to do with when it throttles up quick. My cubs do that too, if they get too much choke or I'm too quick with the throttle. You've got nothing to worry about, your 126 is running like a dream by the looks of your snow thrower vids!

[Userj8670]

Originally Posted by cadzag72

I'm sure if you throttle up slowly you don't get that smoke. The engine just gets more fuel than it knows what to do with when it throttles up quick. My cubs do that too, if they get too much choke or I'm too quick with the throttle. You've got nothing to worry about, your 126 is running like a dream by the looks of your snow thrower vids!

Well thank you for the kind words! Truth be told she really doesn't have that many hours on it. When my grandfather passed away in '84 it sat til probably the late 90s with a start up maybe once a year. That aside I have noticed to thst if I throttle up slowly there is one part in the rpm range (on the way up from idle to high) where she will still put a puff of black smoke out but you really have to look to see it. I'm not worried about it but just wanted to know if I was the only one who experienced this. It's a great machine and I love it. By the way speaking of snow blower vids are there any other chute options for say a taller chute to give me more distance?

[cubfan]

Originally Posted by gmbadgley

As long as she is running OK, don't over think it. It will drive you crazy and you will spend more than it is worth to fix something that is really not a problem.
Remember that you have a machine that is 40 years old, she has done a lot of work and does not have all of the "new" technology behind it, so a little smoke won't kill anyone.

No truer words have ever been spoken,well said.

[Rdrnek]

Originally Posted by Userj8670

Well thank you for the kind words! Truth be told she really doesn't have that many hours on it. When my grandfather passed away in '84 it sat til probably the late 90s with a start up maybe once a year. That aside I have noticed to thst if I throttle up slowly there is one part in the rpm range (on the way up from idle to high) where she will still put a puff of black smoke out but you really have to look to see it. I'm not worried about it but just wanted to know if I was the only one who experienced this. It's a great machine and I love it. By the way speaking of snow blower vids are there any other chute options for say a taller chute to give me more distance?

I have heard that you can put a smaller pulley on it snowblower which will make it turn faster and throw farther. I don't know the particulars though

[jimbob200521]

Originally Posted by Rdrnek

I have heard that you can put a smaller pulley on it snowblower which will make it turn faster and throw farther. I don't know the particulars though

You can do this but this is getting into a whole other discussion. Here is a link to another thread in the Implements Section that discusses smaller pulley's and the page I linked to actually has the calculated speeds associated with smaller pulleys. Keep in mind, though, that a smaller pulley puts more stress in the bearings, u joints, etc so proceed with caution. If they blower is in good shape, shouldn't be a problem to go to a 4" or so but ymmv. Good luck!

http://www.onlycubcadets.net/forum/s...t=28677&page=6

[dvogtvpe]

some of that black smoke is from reversion . when the engine is accelerated fast reversion is created. since the intake valve opens before TDC on the exhaust stroke the piston is still traveling up when the intake starts to open. the fuel is pushed back out of the carb into the air cleaner and drawn back in again. hence the black smoke. lobe centers and cam timing can make magnify it. this is the reason you see velocity stacks on the pullers. you can take advantage of some of the reversion being suspended in the velocity stack . bottom line, don't worry about it. pretty normal.
as others have said a air cooled engine is better off rich than lean.

[Userj8670]

Thanks for the replys everyone. As to the blower I really feel kinda funny about changing the pulley. I figure the cub cadet engineers know better than I do so I would prefer not to mess with it but a taller chute I could def get used to. My buddy has a 12 hp wheel horse (raider 12) and has a single stage blower with a tall chute (like the new airens snow blowers) and it is almost like having a 2 stage. I was hoping for some thing like that?

[Userj8670]

Here is a video of what I'm talking about. ..fast forward to 40 seconds ...and yes I know it's not a cub but it's got a tall chute!

http://www.youtube.com/watch?v=IaoFbnurLEE