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Old 30 November 2014, 11:10   #1
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It was all going so well

So I've been attempting the replacement of the top-mounts on my 85AET Yam 2 troke... And until today it was all going quite well. Got the powerhead off with only one sheared bolt, and since it was already pretty much out of the threaded part when it sheared that seemed to be reasonably good going.

Today I tried to get the clamp at the top of the leg which hold the mounts in place off, and all three bolts sheared like they were made of creamcheese:
Click image for larger version

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I've also managed to shear one of the bolts of the lower mounting clamp:
Click image for larger version

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ID:	101276

So I'm looking for an engineering shop or someone with a pillar drill, in West Yorkshire, or at least 'the North' who can drill these out and fix the threads for me. Any ideas? The leg is off the boat right now so I can take it to wherever it needs to go.

Cheers.
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Old 30 November 2014, 11:23   #2
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Might sound strange but Ripon farm services or wharfdale tractors have some handy engineers
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Old 30 November 2014, 12:15   #3
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Quote:
Originally Posted by Clamchowder View Post
So I've been attempting the replacement of the top-mounts on my 85AET Yam 2 troke... And until today it was all going quite well. Got the powerhead off with only one sheared bolt, and since it was already pretty much out of the threaded part when it sheared that seemed to be reasonably good going.

Today I tried to get the clamp at the top of the leg which hold the mounts in place off, and all three bolts sheared like they were made of creamcheese:
Attachment 101275

I've also managed to shear one of the bolts of the lower mounting clamp:
Attachment 101276

So I'm looking for an engineering shop or someone with a pillar drill, in West Yorkshire, or at least 'the North' who can drill these out and fix the threads for me. Any ideas? The leg is off the boat right now so I can take it to wherever it needs to go.

Cheers.
I feel your pain...
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Old 30 November 2014, 12:18   #4
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If theres no "stub" of bolt left poking up to weld a nut to......... I would be looking for someone with a bridgeport or similar large milling machine. Machine shop job I suspect.
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Old 30 November 2014, 12:36   #5
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try welding first - great big nut, very carefully make sure the weld gets onto whats left of the bolt then completely fill with weld, allow to cool - this allows heat to travel down to where its seized which then frees it off. i personally have around a 80% success rate with this method. i do this first as the threads dont get damaged, i just clean them out with a tap.
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Old 30 November 2014, 12:43   #6
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I don't think I've ever managed to get those top clamp bolts out without shearing one or several of them.

I would definitely try pool welding a nut on top first.
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Old 30 November 2014, 13:52   #7
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Okey doke, but I'm going to need someone to do that for me too, since I don't know how to weld. The ones on either end have a bit sticking up, but the centre one is recessed.
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Old 30 November 2014, 14:12   #8
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There is a chap in Elland that's Sh!!! hot at that sort of thing
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Old 30 November 2014, 14:36   #9
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Quote:
Originally Posted by Clamchowder View Post
Okey doke, but I'm going to need someone to do that for me too, since I don't know how to weld. The ones on either end have a bit sticking up, but the centre one is recessed.
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There is a chap in Elland that's Sh!!! hot at that sort of thing
Listen to Mick
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Old 30 November 2014, 15:57   #10
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There is a chap in Elland that's Sh!!! hot at that sort of thing
Got any contact details?
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