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Message Board - Machinery: Autorotorake engine

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Peter Robinson
Posted 21 Oct 2011
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Posts: 78

The engine on my autorotorake has died, just wondered if anybody had a second hand one for sale
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Matt O'Shea
Posted 24 Oct 2011
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Posts: 59

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Peter,

The engine on my ARR3 also threw a fit and then popped it's cloggs last month.

I wanted to save the machine as I think it's a decent bit of kit and a new one is about £4500.

I found the following on the internet and followed it up.

http://www.miketaylormachineryltd.co.uk/mike_services.html

The kit arrived promptly, but came in at about £400 including the new engine.

Now the important thing is that you can change the engine; but it is not as easy as just bolting it on.

The reduction gear and housing need to be salvaged, and a new gear fitted to the new drive shaft.

This drive shaft needs to be drilled tapped and cut which on a new engine that you have just paid £400 odd quid for is high stakes mechanics.

This should not be undertaken by someone who doesn't know the working end of a screw driver; but can easily be achieved by a half decent DIY mechanic. If you feel it is beyond you, I'm sure you could find a firm that could assist.

All of the processes are straight forward for a decent mechanic and it gives a good opportunity to service the remainder of the machine at the same time.

I completed my teardown yesterday and I 'm attaching a picture.

I'm sure you'll agree that it has come up very well and should provide many years of good service to come.

If you do undertake the job, I'll be more than happy to assist in any way I can.

Regards - Matt
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Matt O'Shea
Posted 24 Oct 2011
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Posts: 59

00 072
Another showing the reduction gear housing
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tonybolton
Posted 24 Oct 2011
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Posts: 1599

Looks a good job Matt, correct me if I'm wrong as I'm not very technically minded. On the old Auto. RotaRake Mk4 was the main drive from the Kubota engine from the camshaft and not the main drive shaft and is that the reason you need to have the reduction gear housing. I know when my engine went it took a friend a load of searching to find the right Kubota replacement but he did eventually find one. Your Honda engine and the gear reduction housing look a very good alternative and reasonably priced I'm sure a few knackered ARR will be coming out of the back of the shed. Thanks.
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Matt O'Shea
Posted 24 Oct 2011
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Posts: 59

IMG00244 20111012 1915

Tony -

This is an old ARR3, originally powered by the cast iron blocked MAG engine.

The grey reduction box was almost part of the MAG engine and had to be salvaged, and the new gear fitted within it; and then fitted to the Honda.

That new Honda engine fired on the first stroke of the first pull. Unbelievable.

I'll attach a photo of what it looked like when I got started.

Every piece of the machine was removed, serviced and replaced.

I've one bolt and two washers left over, they can't have been important.

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Mark
Posted 24 Oct 2011
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Posts: 964

Still of the fags

Cracking job, well done indeed.

And a workshop you can walk around,what luxury.

Mark
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tonybolton
Posted 24 Oct 2011
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Posts: 1599

Thanks for that Matt thought I was probably wrong, I thought the reduction box had come with your new engine and not off the old one, does it do the same job as the camshaft drive on the Kubota, thanks TB
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