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Old 22 February 2014, 12:02   #1
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Studs!

While gszing st my engine during a break in trailer fettling i noticed that the nuts which hold the steering bracket on were rusted to buggery, to the point where bits were flaking off. So I had a go at getting them off (it's not the sort of thing you want to fail at sea!)

Turned out that they weren't as rusty as all that after all:
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I'd like to reattach the bracket with some nice stainless locknuts, anyone know what size they ought to be for these studs? (It's a 1993 Yam 85AET by the way)

Cheers,

Dan
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Old 22 February 2014, 20:52   #2
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Boink! Anyone? Owners of mid-90s yam w strokes?
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Old 23 February 2014, 03:44   #3
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Take a nut off of something else, I can see a couple on your transom, try them, if it fits use that as a guide, difficult to tell without any reference point but I'd guess at M 10 or 8
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Old 23 February 2014, 04:42   #4
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We did those on the mac rib didn't we biff? M10 me thinks.....
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Old 23 February 2014, 04:42   #5
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I've got a couple of new ones to go on mine.. it wasn't metric if I remember it was a unf thread, will try to find them today
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Old 23 February 2014, 05:00   #6
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We did those on the mac rib didn't we biff? M10 me thinks.....

Yes we took them off but put them back on. Didn't really look at them
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Old 23 February 2014, 05:05   #7
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M10x1.25 pitch
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Old 23 February 2014, 05:45   #8
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I thought it would be metric but wasn't sure, my way of thinking was that Yamaha would never have seen a unf Type thread
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Old 23 February 2014, 06:00   #9
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I thought it would be metric but wasn't sure, my way of thinking was that Yamaha would never have seen a unf Type thread
The only unf thread I know they use on the heat exchanger straps on the diesel .
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Old 23 February 2014, 09:17   #10
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Ok found them,, the M10 nut and bolt in my pic (sorry can measure the pitch) is not the same as the new yam nuts, its screws on 1/2 turn and locks....its a slightly finer thread hence I could not find any new nuts to suit and had to order them...you can visually see its slightly different.etc
These are the part numbers for your 85hp, 90185-10051
NOW im assuming your thread is the same as the Yam 90 two strokes and the same as my 2004 60 t/s which is what I have here.
A pure guess that yours is the same thread..and they have just altered the part number 25 years down the line to the pt no i have shown.

By the way, you can have them for 100

I would send them up to you but i need em!
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