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Old 18 August 2005, 16:41   #11
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Tim

Went through exactly this a few months back when mounting my Suzi 200.

Having ''been there done that' with Stainless steel bolts shearing off on Motorcycle brakes, I used M12 High Tensile (88) bolts and nylocks to mount the engine and covered them in grease to keep the salt out.

I was quoted about 140quid for the 6 suzuki nuts and bolts which I was NEVER going to pay.

Nasher.
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Old 18 August 2005, 17:28   #12
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So it seems for me to get high tensile bolts that are STAINLESS will cost me an arm and a leg...or will they be cheaper direct from a bolt supplier somewhere?

If not it seems my choice is either:

1) go for high tensile non stainless and hope they don't rust
2) go for stainless bolts but non high tensile and hope they don't break

I'm not to keen on paying 100 for 4 bolts!
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Old 18 August 2005, 17:54   #13
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Don't go for rustable steel bolts long term, Tim. Go for the high tensile stainless ones.


Phone Lee Fairweather and ask him, or closer to home phone Kevin Mole....Helped me when I had questions about Hyd Steering.

Andy
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Old 18 August 2005, 18:04   #14
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Andy,

Kevin mole was the one who quoted me 100 for 4 bolts...apparently stainless steel high tensile. I would imagine they would be yamaha ones (or similar) so I'm sure I could get them a lot cheaper elsewhere. Apparently bolts are normally supplied with a new engine.

Will it really be that risky using ss bolts which aren't high tensile? I would have thought the cast ali saddle of my outboard would crack before a NON-high tensile 12mm stainless steel bolt sheared?

Tim
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Old 18 August 2005, 18:09   #15
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Quote:
Originally Posted by jwalker
Stainless bolts are not the material of choice, use high tensile ones. Seal them and they'll last for years. They should have 8.8 marked on their heads. They're cheap too. You could use stainless nuts if you prefer. M12's will be fine. Now you just need to find the chunky washers.
I followed this advice back in January 2004, except that I went for UNF. All OK so far, although the bolt heads are discoloured, of course. The biggest problem I had was geting bolts long enough and with thread far enough down the shank, which is why I purchased them from Namrick.
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Old 18 August 2005, 18:24   #16
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I'll have a rummage though the stores at work tomorrow Tim, don't think we use 8.8 ht bolts any more but use the 12.9 ones instead (Mark Halliday will tell you if these are any good). Will also find out from the designers what tensile strength stainless bolts come in (if you can get em). Thing is the tensile strength of a bolt is mainly dictated by the carbon content of steel.....

Here's another more web site for you to visit: http://www.a2a4.co.uk/

Till tomorrow.
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Old 18 August 2005, 18:33   #17
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ah ok Richard, understanding a little more now. Thanks for the advice. I have found plenty of suppliers of zinc coated and galvanised ht bolts.

Andy, thanks, that would be great. That website doesn't seem to work!

Tim
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Old 18 August 2005, 18:35   #18
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Just clicked it, works for me!
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Old 19 August 2005, 01:53   #19
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for what it matters i use this company in birmingham
monofix 0121 359 2117
they supply any bolt you can name and will send via post , my old engine (135hp opti)was bolted on using stainless shear bolts for security reasons sure i paid 8.00 per bolt including nyloc to go over the shear head after wards to be safe like.even though i used threadlock 243 on it also .as you do
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Old 19 August 2005, 08:28   #20
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STOP ! DONT SPEND 100 QUID

I have just spoken to 2 local steel merchants / suppliers.

There is no such thing as high tensile stainless steel.

There are 2 grades of stainless steel A2 and A4.

A4 is the marine grade stainless steel which just so happens to be higher tensile steel than the standards A2 but is not as high tensile as Hight Tensile steel.

It is perfectly possible that the mention of High Tensile Stainless is refering to A4 marine grade stainless.

Any way DUTCHY FASTENERS (01872 573999) (http://www.duchyfasteners.com/) have M12 100mm A4 Grade stainless bolts for around 2 each in stock.
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