Abby’s Guide > Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) > Discussions > Replaced Standard Snowblower Carburetor with Adjustable Type
Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions |
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Richie
 
Bring On The White Stuff
Location: Long Island, New York
Joined: Dec 12, 2003
Points: 562
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Replaced Standard Snowblower Carburetor with Adjustable Type
Original Message Feb 2, 2005 4:47 pm |
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I had reservations about doing this on a new snowblower, but I have to tell you, this engine runs even smoother than it did before. After the new carb was installed, I figured it didn't need to be started using full throttle as you normally would have to do. After two hits of the primer, I raised the throttle to just over the idle position, and it started on the first pull. In fact, it was much easier to warm up with the modified carb than it was with the original one. I found I didn't have to manipulate the choke settings to keep it running as I did before. After a good warm-up, I raised the throttle to maximum and adjusted the high-speed main fuel mixture. When the engine smoothed out, I lowered the engine speed to the idle position, only to find it was idling at 1,550 RPM's. Amazing, because the EPA carburetor had to idle at 2,300 RPM's. I did a fine adjustment to the low-speed mixture until it was at its smoothest. What was most obvious to me was just how smooth it ran at any speed. Normally there was just enough vibration that it would translate to the very long chute on this snowblower, but not anymore. Aside from the noise these snowblowers make when running, if you grabbed the handle bars, you were only able to detect the slightest amount of vibration. The only surprise I did notice was that after the carburetor was fully set, the maximum engine speed had increased to 3,500 RPM's. I did make a minor adjustment to the governor to bring the speed back down to 3,400 RPMs, what it was set at prior to all of this. Having to lower the governor setting, made it apparent to me just how much power gets robbed from the EPA carbs. I suppose I have to look at it as the engine having that much more power available when the automatic governor kicks in when under a heavy load. I'll put this machine up against a 10 hp snowblower any day of the week.
Richie
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Richie
Bring On The White Stuff
Location: Long Island, New York
Joined: Dec 12, 2003
Points: 562
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Re: Replaced Standard Snowblower Carburetor with Adjustable Type
Reply #9 Feb 2, 2005 6:49 pm |
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I paid $74 for it because I didn't want to modify my original carburetor, which is cleaned out now and storaged. However, this same carb rebuilt has gone for more than what I paid for this brand new one. It is a precise duplicate in every way except that instead of having the non-adjustable main under the bowl, it has the adjustable screw type. The bowl drain valve is still there. Also, if somehow you were able to look down the throat of the carb, the "green" colored plastic jet is now brass. Marc (MMl4) put me onto this person, thank you Marc. This carb dealer knew exactly what was on my mind and had no problem accommodating me. I'd also have to say that due to the carburetor box enclosure, unless you were on your knees and looking up under the carb, you would have no idea I did this. If the machine requires a warranty repair, I'll deal with it at that time. For now, I have a snowblower that runs much superior to what it was originally, and at every stage of RPM, and without a doubt, more available power. As for fuel consumption, honestly, I really didn't notice it used much at all before. If I notice it uses more or less, I'll be sure you let you all know.
Richie
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Richie
Bring On The White Stuff
Location: Long Island, New York
Joined: Dec 12, 2003
Points: 562
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Re: Replaced Standard Snowblower Carburetor with Adjustable Type
Reply #16 Feb 3, 2005 7:04 am |
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How about sharing the new carb part number so others can perform the swap?  Sounds like there is interest... The carburetor is on the machine and the carb box is installed and would be difficult to try to get a part number off at this time. I will look it over and see if I can find any. I didn't bother writing things like that down because I assumed nobody would go to such lengths as I have to get their OPE running well. Boy was I presumptuous on that one  It was also my understanding this carburetor was a custom thing and obviously not something off the shelf. Other than the fact it is the same carb designed for an 8 -10 HP engine, the jetting can't be stock. What I can tell you is that the carb looked precisely as my original. My "turn knob" choke linkage just screwed right to it. Most importantly, I have no clue what jetting is in this thing, that's something I won't be able to determine. The original carb had a main jet that had a green plastic tube that you could see extending into the throat of the carb, this one has a brass one. If you can get the jetting part numbers, you would be able to make the switch much cheaper than I did. I myself didn't want to modify my original carb in any way, rather just get a brand new reverted one.
This message was modified Feb 3, 2005 by Richie
Richie
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TomP
Once you go Mac you never go back!
Location: Central New Jersey
Joined: Aug 4, 2003
Points: 648
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Re: Replaced Standard Snowblower Carburetor with Adjustable Type
Reply #17 Feb 3, 2005 5:49 pm |
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Richie:
Since it is custom do all the replacement/rebuild parts need to come from your contact?
I have a Powerlite that cycles with the idle. How would I determine if your contact has something where the idle mixture can be adjusted?
Snow Team:
Simplicity 1060 DLXE - Toro Snow Commander / 3650 - Honda HS520
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BCS Tractor & snowblower
