rectangular exit at chute is 3"x 4", clogs, going to make 6" round - Snowblower Forum : Snow Blower Forums
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post #1 of 30 Old 03-12-2018, 08:24 PM Thread Starter
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rectangular exit at chute is 3"x 4", clogs, going to make 6" round

I have 3 Murrays (2 Nomas, 1 Craftsman). I don't know why Murray did this, the exit from the impeller at the top of the housing is a rectangular box protecting upwards that the chute is fastened to. The rectangular box measures 3" x 4 1/4" & 5" high.

They have a high front pulling a lot of snow in, then rather than the more common 9" impeller you'd find on MTD machines, they all have a 12" impeller which means they are sucking in a lot of snow then the impeller is pushing out a lot of snow only to be restricted by a reduced opening of 3" x 4". Then it's not as if the snow goes through an opening and out again, it has to travel up this small reduced box 5 or 6 inches before it can exit at the chute. This isn't bad if the snow is dry but it stills slows me down, I have to use a slower gear, and takes me longer! Then if the snow has any moisture, even slower, and the snow comes out in rectangular bricks.

Has anyone had or have a snowblower where this exit is reduced like the Murrays?

I like these machines, especially easy to change belts, just minutes, so easy. However I'm divided, do I sell these and use the money to buy a snowblower with a round exit? I'm not snowblower poor, I do have others, Ariens ST522 5hp 22", and an 8hp Dynamark which has a round exit. Those are for sale but.......

Or do I grind the welds on the rectangular box off, remove the box, then I'd either make and weld a larger square box, or find a local fabrication shop to make me a round cylinder to weld to the housing at the impeller. I was also thinking of finding a small not busy welding shop to do the job, seeing what they want to do the job on the three snowblowers. The two larger, 9/27" Noma and the 10/29" Craftsman, I bought used as all my machines, have very little use so I know what I have. Everything starts, runs great, carbs cleaned, serviced, new belts, tires are all good of course, paint is in good shape, no rust.
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1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #2 of 30 Old 03-28-2018, 04:22 PM
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My 2015 Ariens Platinum 30 SHO has an impeller opening that is 4.25" wide (impeller width opening dimension) and 4.5" deep (impeller travel dimension). I am not sure where you are getting the height of the impeller housing from so I did not measure that. The chute is 6" in diameter and 20" tall with an extra 7" for the deflector on top of chute. The impeller is 14" in diameter and there is a gap from impeller to impeller housing of about 5/16". The engine is the 414 cc LCT with 20 ft lbs of torque and about 12.5 hp. The impeller runs at 1100 rpm and it never blocks the chute regardless of how wet or heavy the snow/slush is. Here is a pic of the impeller opening.



Sounds like your proposed increase in impeller opening dimensions will be what Ariens has done. You cannot do better than copy the Ariens design in my opinion.

Good luck.
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2015 Ariens Platinum 30 SHO - model 921040
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post #3 of 30 Old 03-28-2018, 04:29 PM
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I had a 5.5/24 craftsman / murray like that, once I noticed the rectangle opening I picked up a toro 521 and the craftsman was sold

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1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
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post #4 of 30 Old 03-28-2018, 05:02 PM
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my underpowered snotek has that same type "box" on it without issue in any snow conditions. i did do the impeller mod before i used the machine , so i dont know if the "box" would have caused issues.

24 " 1967? Ariens Sno thro
28 " Ariens Sno Tek
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1966 Gravely LI Walk behind with dog eater

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post #5 of 30 Old 03-28-2018, 05:09 PM
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my brother has a 10/29 craftsman 358cc running 3600 rpm i put and impeller kit on it
Has the same kind of chute as jl it threw snow for chit prior to impeller kit
now its just about ok but max throw is 25 or so
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post #6 of 30 Old 03-28-2018, 07:21 PM
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I have a Craftsman with the rec exit and it sucked until I put the Impeller rubber mods. It never clogs unless is stalls out on super slushy stuff.
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post #7 of 30 Old 03-28-2018, 07:54 PM
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Lightbulb

Honda HS (not HSS) snowblowers have a rectangular exit about 3"x5" and their performance is amazing, bear in mind that their impellers turn fast.



The newer yamaha YS1028J has a 'D' shape of ~5"x3" and again their performance is amazing.



Bottom line, IMMHO the impeller exit does not need to be completely open to have an excellent performance.

Maybe all you need is an impeller seal kit and perhaps a bit of impeller rpm increase.

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post #8 of 30 Old 03-28-2018, 09:06 PM Thread Starter
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Quote:
Originally Posted by YSHSfan View Post
Honda HS (not HSS) snowblowers have a rectangular exit about 3"x5" and their performance is amazing, bear in mind that their impellers turn fast.

The newer yamaha YS1028J has a 'D' shape of ~5"x3" and again their performance is amazing.

Bottom line, IMMHO the impeller exit does not need to be completely open to have an excellent performance.

Maybe all you need is an impeller seal kit and perhaps a bit of impeller rpm increase.

Not being sarcastic, this was definitely enlightening.

Honda's are rare in my area. I have to go at least 20 miles to a Honda dealer, another State, further to another county here, so I've never seen one in person.

I don't disagree that an impeller kit will improve performance, but I can't help feel that a wider opening will increase performance and result in less clogging.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #9 of 30 Old 03-29-2018, 02:16 AM
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If you want to throw snow to the right, that low round chute opening is fine, but if you want better throwing performance in any direction the chute is aimed, that extended rectangular opening will perform much better. I modified my 1975 blower years ago with an approximately 3-1/2" X 5" X 8" high rectangular impeller opening and it improved throwing performance in any direction of about 270 degree rotation that I modified that chute to be aimed at. That blower is a 10-26 with a 3 paddle 12" impeller that I haven't installed an impeller kit on. I also have a few other blowers with the round opening that I'm thinking of modifying to an extended rectangular opening for the improved performance and the extra degrees of rotation I can get in aiming the chute.

~Ray~
~1975 Canadiana 1026 Heavy Duty w/light & limited slip differential (& custom exhaust (need to fabricate manifold), customized impeller housing, removable chute in about 5 sec) (currently out of service)

~ Craftsman 8/25 Trac-Drive C950-52671 (mid 80's ???) (current user) (replaced blown engine with original, now in service again)

~ Craftsman 12/32 OHV 71-52112-1 (now in service)

~Noma GP 1028EL (repaired and serviced for daughter to use)
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post #10 of 30 Old 03-29-2018, 11:39 AM
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I have both the Rec opening Craftsman and the Round wide open Craftsman. The rec definitely can concentrate the snow in any direction. The full open round just hurls alot fast and all over. Here is a video of the 14" impeller with rubber mod 13 hp HF engine blowing alot of snow fast and all over the place. Each has its own purpose.

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