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jrtrebor


Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Picked up a new to me Toro 2450 today.
Original Message   Feb 1, 2012 10:53 pm
All the posts about 5 hp SS lately thought I'd add another.  Picked this up at an online auction today.  Toro CCR2450 GTS.  Not in to bad a shape for $23.00
Missing the handle to turn the chute, but I have one off another parts machine.  Muffler was not even connected (stated that in the auction description) to the block
both screws backed out and they had run it like that awhile.  Ran them back in with a little blue Loctite, good to go.
Before I bolted it back on took a couple of shots of the piston, rings and cyl. walls.  All looked pretty good.








Got good spark.  Compression almost 90 first pull, 95 second pull, 105 third pull.
Wanted to see if it would run before I went any further.  Gave it a shot of stating fluid started on second pull, then died.
Good enough, of came the poly carb.  Little water in bowl but no other dirt (kind of hard to tell with all the carb parts being black)
Carb. back together and on engine.  Decided to drain the tank to check for water.  Well... I found some.
Flushed out the tank.  Fresh gas, started on the first pull.  I think I have another keeper and my CCR 2000 is going on CL.
Had to do a little work on the steel pan that the cutting edge bolts to.  Looked like someone had been banging the
blower into the edge of a manhole cover the way it was bent back in the center.  Also need to weld one of the handle
bracket back on.  Those are a weak spot the pan steel and bracket aren't very heavy steel.
May try and devise some type of chute rotator and deflector handle.  Or a combination of both.
Alll the snow has melted here and none in the forecast for the next 5 days.
Just temps in the upper 30s to mid 40s.  This is supposed to be winter time.



This message was modified Feb 1, 2012 by jrtrebor
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borat


Joined: Nov 10, 2007
Points: 2692

Re: Picked up a new to me Toro 2450 today.
Reply #3   Feb 2, 2012 8:32 am
Super deal for that price!

The pics of the engine are great.  That engine is still quite fresh.  You can rest assured that the owner ran lots of oil in it.  No signs of wear at all in the cylinder,  Lots of cross hatch and the piston still has the machining grooves on it.  Lots of life in that little baby.
trouts2




Location: Marlboro MA
Joined: Dec 8, 2007
Points: 1328

Re: Picked up a new to me Toro 2450 today.
Reply #4   Feb 2, 2012 8:43 am
Jrtrebor,

    Nice.  Hard to top getting a great machine for peanuts.  And as Frank says you can't have just one. 

    You're pretty familiar with the whorling and tworling of impeller speeds and the effects.  Do you have any comments on how the SS's do so well with such low impeller speeds compared to the big guys?   I'm surprised they can toss as well as they do running such low impeller speeds.

aa335


Joined: Nov 29, 2008
Points: 2434

Re: Picked up a new to me Toro 2450 today.
Reply #5   Feb 2, 2012 10:17 am
FrankMA wrote:
Yeah, that's a nice score for $23. These SS machines are like potato chips, you can't have just one....

You got good deal there jrtrebor , I too just bought a Powerlite just to play around with.  I got the 2 stroke bug from reading about boratifying Tecumseh engines.  It's been quite boring without snow so I thought to stimulate the economy a bit by picking up a used snowblower on CL.

Like FrankMA said, these things are like potato chips.  I'm on the lookout for a Toro CR20 or a Murray 21" SS with a Tecumseh HSK850 engine.   
jrtrebor


Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: Picked up a new to me Toro 2450 today.
Reply #6   Feb 2, 2012 9:12 pm
Thanks for all your comments.  I was thrilled to get it for that price.  Bought it sight unseen, but figured I could part it out and make a little if it was beyond repairing.
You never know till you see it in person.  Got it all cleaned up and back together today, started on the first pull.  Now I've got four, 2-CCR2000  1-CCR2450  1-CR20E
Going to keep the CR20E and the CCR2450.  I want to put a chute crank system on the 2450 instead of the arm turn system.  Got everything I need off an old 2000
crank rod, gear box and rod bracket.  But I'm missing the chute ring gear, which is actually the bottom portion of the chute.

trouts2 - "Do you have any comments on how the SS's do so well with such low impeller speeds compared to the big guys?   I'm surprised they can toss as well as they do running such low impeller speeds".

I'm going to assume your really talking about auger tip/edge velocity speeds, Yes?
If so, then I would say that although they are slower I think they are pretty in line with the distance they throw snow.  Compared to a larger 2 stage. Also, obviously the distance a SS throws is very dependent on the type of snow they are throwing.  Much more so than a 2 stage.
RPM is everything when it comes to throwing distance.  A drop in engine RPM of just 100 or 200 can make a noticeable difference in the distance.  On my big blower, I once
calculated that for every drop of a 100 engine RPM he impeller tips slowed down somewhere around 320 rpm. 
Another factor in how far a blower throws, that has a lot of variables.  Is how much snow the blower is being fed.  Up to a point, the more snow you feed it the further it throws (dry snow goes further than wet).  If you don't feed it enough it's throw is pretty dismal. If you feed it too much the throw drops off but the volume through put may increase.  Up to a point, RPM again.

Borat's video was good in that it showed different RPMs being used on similar sized housings and HP.  In watching the video I was also thinking about the two different auger designs.
The conventional type in the Craftsmans and the Power Curve in the Toro.
SS blowers process snow very quickly, in and out.  I think that is part of the key to their abilities.
If snowblowers were horses
SS would be Thoroughbreds, and 2 stages would be Draft horses
This message was modified Feb 3, 2012 by jrtrebor
jrtrebor


Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: Picked up a new to me Toro 2450 today.
Reply #7   Feb 3, 2012 10:41 pm
Finished up the Toro yesterday and decided to add a couple of handles to the chute today. 
Nothing fancy, but much easier to reach.





borat


Joined: Nov 10, 2007
Points: 2692

Re: Picked up a new to me Toro 2450 today.
Reply #8   Feb 4, 2012 9:05 am
Nicely done.  You going to bend the governor tab or just run it at stock rpms?

You'd be surprised by how much more performance you can get even by jacking the rpm up to 4500.  I actually had to slow my 221 down to 4000/4100  rpm because it was pulling me down the driveway too fast.  If you've got a level driveway, the added rpm will extend the throwing distance substantially and the increase in engine speed isn't enough to cause any concern.  The R-tek is a pretty durable engine.  With the split connecting rod, I wouldn't trust it to be spun too high for too long but I wouldn't be afraid to run it up to 5000 rpm on occasion.   

If you get some snow, let us know how you like it.  
RedOctobyr


Location: Lowell area, MA
Joined: Nov 5, 2011
Points: 282

Re: Picked up a new to me Toro 2450 today.
Reply #9   Feb 4, 2012 9:45 am
Nice work, jrtrebor! I like the handles. Was it an eBay auction, with a local seller?

borat, what's split about the R-Tek's connecting rod vs, say, the HSK850's? In the HSK600, at least, the connecting rod is solid at the piston end, and bolts around the crankshaft at the other end. Though I just looked at the HSK850 exploded view (in "Predator Maco shark waiting for boratification.") and I see the 850's conrod is slipped over the crankshaft (as well as the wrist pin in the piston), and does not bolt together at either end. I'm guessing that's what you mean. Which means the smaller 600 is also of the split conrod design, I suppose. Hmmm. I wonder if the 600 will be less tolerant of revs. At least its piston is lighter.
borat


Joined: Nov 10, 2007
Points: 2692

Re: Picked up a new to me Toro 2450 today.
Reply #10   Feb 4, 2012 10:25 am
High performance two cycle engines generally have solid conrods  and built up (pressed together)  cranks.  Built up cranks can take a fair amount of power but are not as strong as a solid piece.  Accordingly, when someone wants to ensure their super-modified or racing two cycle engines remain reliable under extreme loads, they weld the pieces of the crank together. 
 
Tecumseh has cleverly designed the HSK 8xx engines to have both solid conrod and crank.  That's a plus.  The fewer opportunities for rotating, reciprocating and other moving parts to loosen up, the more reliable/solid the engine will be. 

I wouldn't be too concerned about the HSK600 engine not being able to take a few hundred more rpm provided it was properly assembled.  Don't forget that just about every four cycle engine has split big end conrods and those engines can take some serious revs.  The only caveat is that if the engine's connecting rod and crank were not properly assembled (correct torque and lock washers), things could come apart in a hurry.  The bolts/nuts that hold the two pieces of the connecting rod together usually have a large flat washer that is to be bent up beside the nut or bolt to keep it the bolt from backing out.  If this critical step is overlooked, bad things can and will eventually happen. 

Chances are your engine hasn't been apart.  Accordingly, if it hasn't let go yet, chances are it won't.
     
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