Just purchased 2nd 421 - Snowblower Forum : Snow Blower Forums
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post #1 of 13 Old 11-23-2014, 10:15 PM Thread Starter
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Just purchased 2nd 421

Hi guys-

New guy here. I came over from the tractor forum on recommendation from a guy over there.

I've been using an old 421 for years. I have some narrow walks to clear and some tight spots so I appreciate the smaller size machine. I also have about 200 feet of gravel driveway to clear.

The engine is pretty tired so I decided to put another one on there while I overhauled the old one. Turns out a decent running HS40 isn't that easy to come by and most of the ones you see are ridiculously overpriced. HS50s are more common but just as overpriced and I wasn't sure my crank pulley would fit either. Started to consider a 6.5 Predator when I ran across a nice used 421 for $200 on CL.

Spoke to the guy Friday and we missed connections yesterday so I met him this am down in Schneider. I had already decided I was going to pay him his asking price if it was as good as the pics looked. We have 4" of ice on the lake that often isn't frozen until mid December and last year's winter will not soon be forgotten, so with snow in the forecast I figured he would have plenty of calls for it. He said he had a bunch of calls including a guy offering him more than his asking price but he gave me the first shot since I called him first.

Clean, solid, starts on the first pull, needs only skids and a belt adjustment as it slips in reverse. And I have good skids on my newly designated parts machine. I'm satisfied with the deal and that's one less job hanging over my head. When the snow comes I'm ready.

The old 421 was a little workhorse but heavy wet snow would clog it up just like it does most machines. I think I'm going to put wipers on the impeller blades. Has anyone done that on one of these little Toros? Looks pretty simple and worthwhile if it prevents slush clogging.
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post #2 of 13 Old 11-24-2014, 04:42 AM
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hello oldbonnie, welcome to SBF!! the hs50 motor is a direct bolt on, the pulleys will fit. if you don't mind the predator motor it will work for you also. joe has an impeller kit on his toro 521, my kit is still in the box in the door pocket of my van

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1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
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post #3 of 13 Old 11-24-2014, 05:55 AM
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Quote:
Originally Posted by oldebonnie View Post
Hi guys-
The engine is pretty tired so I decided to put another one on there while I overhauled the old one. Turns out a decent running HS40 isn't that easy to come by and most of the ones you see are ridiculously overpriced. HS50s are more common but just as overpriced and I wasn't sure my crank pulley would fit either. Started to consider a 6.5 Predator when I ran across a nice used 421 for $200 on CL. .


if you're looking for HS40/50 engines don't rule out Ebay. there's a lot of used Tec. engines on there at a good price. most sellers just want them gone for a few bucks. I recently picked up an NOS new short block for only $40 including the shipping. I did a quick check and there is a few engines you can use. here's an HS40 for $89 obo





another one for $79







just say NO to Chinese made ANYTHING !
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post #4 of 13 Old 11-24-2014, 06:01 AM
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HS50 engine for $25





and a really nice one for $50







just say NO to Chinese made ANYTHING !
1967 S-242 Snowbird 4/24
AMF Dynamark Luminaire 5362 8/26 3-stage
Craftsman Drift Breaker 10/32 3-stage
Gilson 55012 8/26 gear drive
Ariens 910010 8/32
Cub Cadet 268 8/26
Yard-Man Snowbird 7040-0 5/22
Ariens 10M-L35 3.5/24
New Holland/Gilson Unitrol 8/26
(2) AMF Polar Bear 7/26 3-stage project/parts machines
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post #5 of 13 Old 11-24-2014, 02:31 PM Thread Starter
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Originally Posted by detdrbuzzard View Post
hello oldbonnie, welcome to SBF!! the hs50 motor is a direct bolt on, the pulleys will fit. if you don't mind the predator motor it will work for you also. joe has an impeller kit on his toro 521, my kit is still in the box in the door pocket of my van
Thanks for the welcome. I've seen different parts numbers for 421/521 crank pulleys on the schematics and they look a bit different, although that doesn't mean they won't swap. I've had a couple of people suggest the small frame Tecumseh's had either a 3/4" or 1" shaft but I haven't been able to confirm. My HS40s have 3/4" cranks.

Maybe Joe can give us the lowdown on his impeller kit. I'm thinking of cutting up an old tire and using sheet metal screws.

Impeller mod video:

Impeller mod comparison video, with and without the modification. Pretty impressive results.

Last edited by oldebonnie; 11-24-2014 at 02:44 PM.
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post #6 of 13 Old 11-24-2014, 02:34 PM
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BROTHER DETROIT is the man for those also. ALOHA to the forms..

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post #7 of 13 Old 11-24-2014, 02:40 PM Thread Starter
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Originally Posted by greatwhitebuffalo View Post
if you're looking for HS40/50 engines don't rule out Ebay. there's a lot of used Tec. engines on there at a good price. most sellers just want them gone for a few bucks. I recently picked up an NOS new short block for only $40 including the shipping. I did a quick check and there is a few engines you can use. here's an HS40 for $89 obo

Vintage Tecumseh Engine HS40 Go Cart Mini Bike Mower Tiller Briggs Estate Find | eBay


another one for $79

Tecumseh HS40 Engine 3 4 Shaft PTO Short Block Reverse Extended Cam Ariens 4HP | eBay
Yeah, I checked those out. Thanks for the help. I've been all over eBay & Craigslist. I wanted a runner, and the price of engines that run as opposed to parts engines is just crazy. And frankly I think the parts engines are priced pretty crazy too, when you can buy a new Predator at Harbor Freight for $120. It looks like an relatively easy swap, too, only requiring re-locating the chute control rod mount.

As I said above I found a complete running 421 for $200, which wasn't much more than a running HS50 would have cost me. So my immediate problem is solved and I have a complete parts machine which will become a backup when I get around to overhauling the engine.

Thanks again for the tips.

Skip

Last edited by oldebonnie; 11-24-2014 at 02:41 PM. Reason: sp
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post #8 of 13 Old 11-24-2014, 03:01 PM
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Toro 3521 with 6.5HP Greyhound engine. The Tecumseh H35 was 3/4" shaft. Also, you can see my chute rod relocation fix. Blower worked great with the old Harbor Freight engine. I have a Predator on my current Ariens and it works great too.


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post #9 of 13 Old 11-24-2014, 04:06 PM Thread Starter
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Toro 3521 with 6.5HP Greyhound engine. The Tecumseh H35 was 3/4" shaft. Also, you can see my chute rod relocation fix. Blower worked great with the old Harbor Freight engine. I have a Predator on my current Ariens and it works great too.

Hi Shryp-

That one looks familiar. I think I resurrected an old thread over at the tractor forum that had this one: Toro 521 - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information

I think it was your stuff that got me thinking about a Predator before I found the used 421.

Were you able to use the original pulleys and belts on your engine swaps? Did you have to drill new mounting holes for the engines?
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post #10 of 13 Old 11-24-2014, 05:28 PM
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Yep, that was me.

I am pretty sure I reused the same mounting studs and nuts. I know I reused the old belts and pulley. The only modification I made was the 2x4 block of wood. The reason people are having to replace mounting bolts is a lot of old Tecumseh engines were bolted onto a steel plate that was a lot thinner than the standard aluminum block of the new engines.

With the 2x4 spacer the crank did stick out a little past the machine. It was in the way a little bit, but not too bad. I did manage to hook it on the garage door trim a couple times.

I believe the oil fill caps on the Predators stick forward slightly more than the Greyhound ones did. The couple predator swaps I did have the oil fill pushing on the belt cover slightly, but I seem to remember the Greyhound being flat in the front. It isn't much of an issue though as the plastic belt cover just pushes in a little.

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