CCR 3650 vs Power Clear 621 - Snowblower Forum : Snow Blower Forums
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post #1 of 23 Old 01-03-2013, 12:49 PM Thread Starter
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CCR 3650 vs Power Clear 621

Looking at a used 3650 and a new 621. I know major difference is 2-stroke vs 4-stroke engine. Other than that I would like to hear opinions/experiences between the 2. I've hear some say 2-stroke moves heavy/wet snow better than the 4-stroke and vice-versa. I have been using an MTD 21" single-stage with Tecumseh 2 stroke (4.5 hp) for about 8 years and it does well in deep powder and moderately wet snow.
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post #2 of 23 Old 01-04-2013, 05:27 AM
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are you thinking about getting 621 scotzz
i am interested in the 621 also but there is alway a ccr2450 or 3650 showing up on CL for $200 or less making it hard to justify paying $500+ for a 621

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
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post #3 of 23 Old 01-04-2013, 08:06 AM Thread Starter
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Originally Posted by detdrbuzzard View Post
are you thinking about getting 621 scotzz
i am interested in the 621 also but there is alway a ccr2450 or 3650 showing up on CL for $200 or less making it hard to justify paying $500+ for a 621
Yes.........exactly the situation I am in.........used 3650 (5-6 years old) that looks in good condition or, a new 621. Mostly wondering if the 621 has more throwing distance than a 3650........4-stroke is nice but I can live with 2-stroke

Last edited by scotzz; 01-04-2013 at 08:08 AM. Reason: sp
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post #4 of 23 Old 01-04-2013, 09:47 AM
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i think the throw distance is about the same. i'm going to go look at a 3650r for $200. and i have a sale for my ccr2000r for $200

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
william
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post #5 of 23 Old 01-05-2013, 06:07 PM
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been looking around and the 621 throws snow up to 35ft or 10.7m (info form wise sales ) and has a 5.5hp motor
the ccr3650 throws snow up to 10.5m or about 35ft, had to go on a european site to get the numbers for the 3650. i guess i could have looked in my owners manual

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
william
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post #6 of 23 Old 01-07-2013, 07:38 PM
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watch this powerclear 421qr, it became the 621
2011 Toro 421QR first use - YouTube

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
william
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post #7 of 23 Old 01-08-2013, 07:36 PM
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621 at work
Toro Powerclear 621qze - YouTube

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
william
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post #8 of 23 Old 02-08-2013, 09:54 PM
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Did anyone definitively answer this question as to the actual performance between the units? I am curious

I would offer that the main advantages of a 2 stroke vs 4 is improved power(and size)-to-weight ratio and less needed parts simplicity. The main disadvantage is lower fuel useage efficiency (burn more gas to generate the same power). So if both engines are rated at the same power, all other things being the same, both should perform equally. The larger size of the 4 stroke would mitigate the increased number of power strokes of the 2 stroke.

In practical terms the only differences I see are that the CCR 2000 weighs about 15-20lbs less than the 621, and appears to be a slightly smaller form factor. If it wasn't for the emissions regulations I imagine that 2 strokes would still be used.

The last thing I will mention is that if you have a CCR 2000 that still has an adjustable carburetor (pre 96) that allows for some improvements on the output if the user knows how to do it. I am waiting to find one so as to compare a "tuned" 2000/3000 to the 3650.

Last edited by Spring1898; 02-08-2013 at 09:57 PM.
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post #9 of 23 Old 02-08-2013, 10:19 PM
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I forgot to mention that the 4 stroke has improved torque at any RPM, but operates at a lower RPM (due to more parts) than a 2 stroke.
So in effect a 2 stroke has an advantage in being able to run up at a higher speed. Most of the snow blower engines run in the high 3000's to the low/mid 4000's.
4 strokes are generally set between 2800-3200 RPM although they can run higher (adjustable carburetors are a plus)
To make up for this I imagine that the 4 stroke models simply use a different crank to paddle turn ratio.

In conclusion, my guess is that the advantages of the 4 stroke can be made to work very well in a single stage snow blower, but the "traditional" method of using 2 strokes being both cheaper and what people were used to, made them the preferred choice until time and emissions standards reversed the cost of using them.
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post #10 of 23 Old 02-09-2013, 07:41 AM
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i would have to guess that the 421 and 621 perfoorm equal to a 2450 or 3650, the machines they they replace and looking at the numbers i provided they do

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
william
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