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post #1 of 15 Old 02-09-2020, 03:07 PM Thread Starter
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Plastic Impeller Question

I have a Craftsman 5 HP snowblower with a hardened plastic impeller. I am seeking advice on adding the impeller kits to the machine. With the plastic impeller blades are two bolts adequate for each blade? how close should the holes be drilled apart and what size bolts should be used with the plastic impeller? i will use a strap bar 1/16 inch x 3 inch for a support. Should two be used per blade for added strength (one on top and one on the bottom of each blade)?

Hoping to hear form those who have added the impeller kits to the hardened plastic impeller.

Thank you.
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post #2 of 15 Old 02-09-2020, 03:36 PM
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I do not use impeller kits on any of my steel impellers, as I do not need them, as all my blowers blow just fine.

But I would certainly be leery of drilling through plastic.

JMHO
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post #3 of 15 Old 02-09-2020, 04:09 PM
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Welcome to the forum!

I don't have a 2-stage machine with a plastic impeller, but I'd also be a bit leery of drilling a plastic impeller. Do you have any pics of the impeller? How big is the gap around it? If you have a small gap already, the benefit is reduced.

You might also want to post your question in a different area (perhaps General, or maybe Repairs), vs the New Members area. It might get more eyes that way.

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post #4 of 15 Old 02-09-2020, 05:12 PM
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I have for sale a 2 Stage with a plastic impeller. It's pretty thick and I would not hesitate to drill it. I would use 5/16" bolts with fender washers and torque nuts or the same with a flat rectangular piece of metal in top of the rubber.

If you have a transmission with a drive bar rather than a friction disk with gear speeds, DUMP IT!!!

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post #5 of 15 Old 02-09-2020, 05:42 PM
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post #6 of 15 Old 02-09-2020, 05:43 PM
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Quote:
Originally Posted by JLawrence08648 View Post
I have for sale a 2 Stage with a plastic impeller. It's pretty thick and I would not hesitate to drill it. I would use 5/16" with fender washers and torque nuts or the same with a flat rectangular piece of metal in top of the rubber.

If you have a transmission with a drive bar rather than a friction disk with gear speeds, DUMP IT!!!
I think some of those have single speed friction disk setups as well.
The ones with an actual transmission seem to have a pretty short life for sure.
Either way not good



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post #7 of 15 Old 02-09-2020, 08:25 PM
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I did the impeller mod on both of my Yard Machines (179)cc. Machines with Polymer impellers. Two bolts per fin is fine. The impeller is thick and sturdy. Go to a hardware and pick up four rectangular spacers. These spacers are two inches long and about a half inch wide. These are perfect for this mod. They will come with two holes pre drilled. The bottom of the fin has an area that lines up perfectly with the spacers. You will see what I'm talking about. Now measure the distance from the end of the impeller and where you want to drill. Use this measurement to drill through the fin. Use the metal spacer as a template. You can easily drill through the fin with a hand drill. With the spacers on both the top and bottom of the fins you will not need washers. You will need four 3/4 inch bolts though with Nylock nuts. Note: I don't know what size spacer you will wind up with so when buy them make sure you get the right sized bolts. You do not need to do all four fins just two. Also use the nylon reinforced belting material or your mod will wear prematurely due to the protruding carriage bolts. Cut them to size and line them up flush to the housing. I removed the carriage bolts to get an accurate measurement. Drill through the rubber and tighten down.
.


Note. I would not use a strap bar for this mod as more than two equally distant holes in a polymer fin could weaken it. I have not noticed any problem with the impeller using two holes per fin.
.

Last edited by BlowerMods1; 02-09-2020 at 08:58 PM.
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post #8 of 15 Old 02-09-2020, 10:53 PM
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Quote:
Originally Posted by BlowerMods1 View Post
I did the impeller mod on both of my Yard Machines (179)cc. Machines with Polymer impellers. Two bolts per fin is fine. The impeller is thick and sturdy. Go to a hardware and pick up four rectangular spacers. These spacers are two inches long and about a half inch wide. These are perfect for this mod. They will come with two holes pre drilled. The bottom of the fin has an area that lines up perfectly with the spacers. You will see what I'm talking about. Now measure the distance from the end of the impeller and where you want to drill. Use this measurement to drill through the fin. Use the metal spacer as a template. You can easily drill through the fin with a hand drill. With the spacers on both the top and bottom of the fins you will not need washers. You will need four 3/4 inch bolts though with Nylock nuts. Note: I don't know what size spacer you will wind up with so when buy them make sure you get the right sized bolts. You do not need to do all four fins just two. Also use the nylon reinforced belting material or your mod will wear prematurely due to the protruding carriage bolts. Cut them to size and line them up flush to the housing. I removed the carriage bolts to get an accurate measurement. Drill through the rubber and tighten down.
.


Note. I would not use a strap bar for this mod as more than two equally distant holes in a polymer fin could weaken it. I have not noticed any problem with the impeller using two holes per fin.
.
What size gap did she have from the factory



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post #9 of 15 Old 02-10-2020, 01:27 AM
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Quote:
Originally Posted by David Broadwater View Post
I have a Craftsman 5 HP snowblower with a hardened plastic impeller. I am seeking advice on adding the impeller kits to the machine. With the plastic impeller blades are two bolts adequate for each blade? how close should the holes be drilled apart and what size bolts should be used with the plastic impeller? i will use a strap bar 1/16 inch x 3 inch for a support. Should two be used per blade for added strength (one on top and one on the bottom of each blade)?

Hoping to hear form those who have added the impeller kits to the hardened plastic impeller.

Thank you.
Would be nice to have a couple of picts of your plastic impeller ...

1999 Yard man 9 27 31AE653G501 with impeller mod
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post #10 of 15 Old 02-10-2020, 08:05 AM
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If you're on FB post your URL and I can post the pics to your page. My machines came with a half inch gap. Huge for any size blower, let alone a 5 hp.

Last edited by BlowerMods1; 02-10-2020 at 08:09 AM.
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