Bought A New Engine But Crankshaft is Unusable

[Marpab96]

So first things first first, I'm a complete beginner at this. I picked up this hobby to learn and thought it would be great. I say that because I'm not yet familiar with the lingo or many of the language, though I have been doing my best to do my research. Please try to answer my question in the simplest terms possible and explain the terms you use

So anyway, I bought a Toro Lawnmower engine off of craigslist for $20 since it was in pretty rough shape. Very rusted and seized since it was sitting outside for a long time. Im not sure of the model but i think it may be a Tecumseh.

Now, the problem i'm having is that the crankshaft does not look right. It is not circular and does not have the groove other crankshafts do it may be a deal breaker for me as far as this engine goes since i dont have the tools to machine metal.



Here is what it looks like



And a side profile



Enven though its heavily rusted, it doesnt look like theres a smooth cranskshaft underneath. My only hope that im wron is that weld that i see on the side. Maybe if i take that off the cranskshaft underneath will come out if there is one?

Please help. Any and all suggestions are appreciated. Thank you

 

[mckutzy]

Thats a vert engine... They dont run in the horizontal fashion without modification......
None here have fully attempted to do so as the size of the job and over all pain-in-the-butt it is isnt worth the effort, when $99(or less) one could spend over at the HF to get a new hemi....

 

[Hellion]

Making no assumptions here, I figure he's just asking basic engine questions since he didn't mention an application for this engine.
Maybe he wants a vertical shaft engine...

Shame on you McKutzy and your rigid thinking.

 

[Marpab96]

Making no assumptions here, I figure he's just asking basic engine questions since he didn't mention an application for this engine.
Maybe he wants a vertical shaft engine...

Shame on you McKutzy and your rigid thinking.

You're right Hellion. I failed to mention an application for the engine. I plan to put in into a go-kart. I was thinking of putting on a Right angle 1:1 transmission and into either a torque converter or a centrifugal clutch. However, that shaft doesnt allow me to do that


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[Hellion]

I think the rusted part you photographed is an add-on after the fact. I think there's a regular shaft under that "blade holder assembly" we're seeing here.

Most crankshafts are tapped for a screw in the end. Seeing that there's a hole on the end of the blade holder in photo #1, I'm inclined to think there's a screw up there holding the blade assembly on the shaft, if in fact that's the case.

Take a look-see.

 

[karl]

Why not use the existing pulley to go to the right angle box?

IF you get the hub off there should be a keyed 7/8 shaft under there.

 

[Marpab96]

Why not use the existing pulley to go to the right angle box?

IF you get the hub off there should be a keyed 7/8 shaft under there.

What do you mean by using the existing pulley?


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[mckutzy]

It will come off. It needs to be heated to break the seal holding it. It will most likely be NOT tapered.. which will help...

However...Im of the understanding that the blade helps to balance the movement of the motor as it also has a light weight flywheel....

 

[karl]

What do you mean by using the existing pulley?


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Put a vbelt around the rusty thing you took nice pictures of. Attach pulley to input of right angle box.

I am for once on the buy a predator bandwagon. Its not worth the effort in my opinion. Or find a horizontal shaft motor on cl.

 

[dozerdroid]

Yes that is a Toro Recycler mower engine and pulley, once they get rusted on it can take a lot of penetrating oil and a good puller to get it off, sometimes a little heat, what you are seeing is the blade driver adapter, look up part no. 106-3987 on ebay, if you get if off you will have a 1" keyed shaft, 3 5/32 long, 7/16-20 tap hole on the end. This mower used a Tecumseh engine up till about 2008, in 2009 switched to Briggs and in 2012 switched to Kohler. All worked ok but in my experience Tec was the most finicky and Kohler the best. Good luck.

 

[Marpab96]

Yes that is a Toro Recycler mower engine and pulley, once they get rusted on it can take a lot of penetrating oil and a good puller to get it off, sometimes a little heat, what you are seeing is the blade driver adapter, look up part no. 106-3987 on ebay, if you get if off you will have a 1" keyed shaft, 3 5/32 long, 7/16-20 tap hole on the end. This mower used a Tecumseh engine up till about 2008, in 2009 switched to Briggs and in 2012 switched to Kohler. All worked ok but in my experience Tec was the most finicky and Kohler the best. Good luck.

Wow thank you so much! You seem very knowledgable and im impressed you knew all those details.


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[Hellion]

Yes that is a Toro Recycler mower engine and pulley...

Thanks for joining the forum just to answer this one question. That's dedication.

 

[Marpab96]

Guys, i did it!

I managed to pull the piece off of the crankshaft with a device my girlfriend's father made.

Here's the device deconstructed:

The device consists of two 1/4" metal plates and bolts. Im not sure how thick the bolts are but my guess is about 3/4" thick with three (3) nuts and one (1) washer each. Holes are cut into the plates as shown to put the bolts through.

The plates are cut so that they can be slipped on behind the piece and on the crankshaft

He designed this to take frozen or heavily rusted props off of boats but it worked for this too.

Heres how it's mounted on:

The two top nuts are locked against each other on a vice so that they cannot spin, the nut and washer are place behind the plate and arrested with a wrench to prevent them from spinning as the bolts turn

Using another wrench. I began to turn the bolts clockwise. After about ten minutes of slowly turning and alternating between the two bolts, the piece began to slide:

All in all, it took me about 20 minutes to take the whole thing off. The mechanical advantage this thing provides is ridiculous.

As mentioned before, the underlying crankshaft


Thank you all for your help!

 

[ezcome-ezgo]

Sweet. Kudos to the GF's Pop.