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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spottedpony
Joined: Aug 23, 2004
Points: 301
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Re: Replaced Standard Snowblower Carburetor with Adjustable Type
Reply #7 Feb 2, 2005 6:10 pm |
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this sort of goes hand in hand with thoughts i had way back in the 70's when we started seeing air pollution controls on automobiles. fuel milage decreased on comparable engine models, in some cases by half. so if fuel economy suffered how can they be less polluting? (to me) it stands to reason the cleaner they burn, and the better they run, be it an auto or any thing else with an internal combustion engine, the less pollution is left to be pumped into the atmosphere. case in point, years ago i had an old ford with the 289, finally wore the engine out and had to replace it with a 302 with all the pollution controls on it. milage dropped from 20 to 11 mpg. it doesnt stand to reason with that increase in fuel consumption it would be less polluting? and i think the same holds true with power equipment engines, keep em tuned, and adjusted they burn far cleaner than the so called "clean burning" setups. at least my experiences have been they do use less fuel. Richie, if you've kept any track of fuel usage before the carb change, i think we'd all be interested to hear about any differences in fuel consumption after the swap. im betting it'll use less fuel while performing better. |
AZinOH
Those who accept self-deception will perish by it.
Shakespeare said "to thine own self be true".
Joined: Nov 25, 2004
Points: 189
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Re: Replaced Standard Snowblower Carburetor with Adjustable Type
Reply #8 Feb 2, 2005 6:15 pm |
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If a dealer mechanic had his hands on this machine, would it be plainly obvious that he was looking at a replacement carb, not the original? Or does it look exactly alike? I'm pleased to hear your modification was successful. I'm just wondering if at some later date a dealer might try to hassle you over a warranty claim or give you some other grief because the carb was not the original. AZ
Snowblower...Toro Power Max 726te 2004 Lawn tractor...AYP w/ 14.5 Briggs-42in 2000 |
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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BCS Tractor & snowblower
