QA42A Speed

[gmbadgley]

Does anyone know what the ratios are supposed to be?
I have a 1/1 between the Engine and angle box and 2/1 from the box to impeller. So if the engine is at 3000 RPM the impeller is at 1500. I am not happy with the performance of it at all. It is on a 1450 and a back up to my Toro 2 stage walk behind, but it only seems to throw a few feet. The pto & belt do not appear to be slipping so that leaves about one thing left - speed.

I seem to remember someone somewhere talking about changing pulley around for more speed. Any thoughts?

[Jeff in Pa]

They were originally designed for an engine speed of 3600 rpm.

3000 rpm is only 83% of recommended engine speed.

Also, what type of snow? Slush/wet doesn't throw far.

[macman81]

I run a 3.8" pulley on mine works great. I think original pulley was 4.5". What size pulley is on your thrower?

Also paint ez slide on chute and inside thrower housing will help

[gmbadgley]

I haven't measured the diameter, I just marked them to find the ratio.

The snow here so far has been slush (nothing throws that) and lake effect, the type of stuff that you can blow 30' with a leaf blower. I know it is only a single stage blower and by design the Toro should always out throw it, But I feel the unit should throw more than a few feet.

[macman81]

Mine throws wet heavy snow 10-20 ft and light snow about twice as far. With the 3.8" pulley. If you want to try one I can look up the part number for you. Also need 3600+ rpm or you won't throw well either

[jimbob200521]

Originally Posted by macman81

Mine throws wet heavy snow 10-20 ft and light snow about twice as far. With the 3.8" pulley. If you want to try one I can look up the part number for you. Also need 3600+ rpm or you won't throw well either

I'd be interested in a part # on this, too. And a belt size, too as the stock belt would be too big?

[gmbadgley]

Part # for me is not an issue, I do a lot of fabrication. I was just wondering what others had as far as sizes. Like I said, I seem to remember someone turning up the auger speed some by changing sizes.

Thanks.

[JRJP56]

I ran a QA42 on a 12hp Cub 106 for years and it would always have trouble with slush but I had swapped out the pulley for a 3.5 stock pulley from Ace hardware, cast iron Not aluminum(they won't hold up) goood snug belt, well painted blower housing and chute. It would put snow out to 20' feet depending on conditions but always got it off the drive.

[macman81]

Cast Iron V-Belt Pulley
4.15" OD
Bore size
3/4"
Each
$17.69 Each
McMaster-carr part number 6204K22

All come furnished with a set screw.

Cast Iron
OD 4.15"
Pitch Diameter for Type A V-Belt 3.4"
Pitch Diameter for Type B V-Belt 3.8"

this is the pulley i run on my 1650 works great. i guess its actually 3.4" diameter for our application. get a good tough belt and run tight as you can get it and your in business!

i believe i had to go 1" shorter on the belt but i didn't write the number down sorry.

[gmbadgley]

Thanks guys, If I have time tomorrow I'll pop the blower off and measure up what I have. From looking at it I would guess at least 4", time for a smaller one and speed things up some.