Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I have had a Toro CCR 2450 snowthrower that has worked great for the past few years.  I've used it a few times this year without incident, but today something went wrong.

I started it up and it started the first pull.  However it reved very high for several seconds and then the running normalized.   This reving was very high and I have never heard it run like that.  It sounded like it was running okay, even when I engaged the blades, but as soon as I hit the snow, the load of the snow really slowed down the engine.  It only threw the snow a few feet at first but then didn't even do that and sounded like the engine was going to quit until I stopped pushing it and it reved up to normal sound again.  Every time I pushed it into the snow the engine would slow way down.  The snowfall I was trying to clear  was about 6 inches deep but this snowthrower has handled even deeper with no problem.

Anyone have any ideas?  I'm thinking it might be the carberuator.

friiy wrote:

I removed the covers to look at the engine, and the throttle shaft you speak of.  Wasn't sure if I was looking at the right thing but right between the carb and engine there was a spring attached to an 's' type of bracket and also linked to something the obviously rotated inside the carb.  I moved it back and for but the spring didn't seem to have any effect on it since whatever moved seem to stay in the position I left it in.  I moved it back and for several times to loosen it up, it seemed to move a bit more freely but not enough that the spring was a factor.  Maybe that is the thing that is gummed up you were talking about.