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Old 19-08-2005, 10:26 PM   #1
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What steering.......

...would you recommend for a boat running in 1.3L? ie Yamaha 90hp

Is it worth going hydraulic and if so what type?

Thanks

Martin
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Old 19-08-2005, 10:33 PM   #2
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Are we gonna see the re-birth of 1.3?

go get ya wallet Yorke!
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Old 19-08-2005, 10:34 PM   #3
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its about time he stopped faffin around eh!
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Old 20-08-2005, 09:56 AM   #4
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I have an old hydrualic steering system that you can have for a few quid. But its does need new hoses and through tube.
The parts I have are 1 steering ram and the helm. The hoses require 'banjo' type fittings which are common place. I think it would cost about £60-£100 for new hoses and about £20 or so for a through tube.
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Old 20-08-2005, 12:23 PM   #5
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Thanks Mr Rob but I think I will buy a completely new system for peace of mind.

Any suggestions for make and type thats best.

M
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Old 20-08-2005, 01:18 PM   #6
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I guess seastar, and go for the 'pro' model.

Some will I'm sure, say that wire steering is right for 1.3, but it does seem a little antiquated!

The setup on Paul's (ice cream truck) P21 is really smooth/light, very nice indeed, i'll check out what it is and let ya know.

jf
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Old 20-08-2005, 06:54 PM   #7
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Thanks
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Old 20-08-2005, 10:31 PM   #8
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Quote:
Originally posted by Jon Fuller
I guess seastar, and go for the 'pro' model.
You don't really need Pro if its only on a 1.3. Normal Seastar will be fine. I've seen normal Seastar fitted to 1.8 litre OCR boats.
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Old 20-08-2005, 10:37 PM   #9
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Does anyone actually know what the difference is between std, and Pro?
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Old 20-08-2005, 10:49 PM   #10
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standard is rated to 1000psi, pro to 1500psi
hoses on pro are up rated (kevlar) to cope with extra pressure
Rear cylinder s used to be the same but i believe the new pro's have woodruff keyed ends to stop some of the play

think standard is rated to 200 hp and 60mph and pro is rated to 300hp and 75mph
both systems say Not recommended for use in installations where:
a) chopper, cleaver or surface piercing propellers are used,
b) the engine is highly elevated on the transom,
c) engine trim tabs have been removed,
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Old 20-08-2005, 11:07 PM   #11
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Thats pretty much it!!!

Both rear cylinders are rated to 1500 PSI and untill recently the normal and the pro version used the same rear cylinder. However there is as Burty said now a Pro rear cylinder that has less play due to tighter tolerances and locating keyways on the end brackets that hold the cylinder to the now slightly thicker tilt tube. These keyways stop the assembly from twisting. It was developed by Teleflex and Darris Allison (Allison boats, American made light weight V bottoms that run well over 100mph) as he wanted a ram with zero play for use on his boats. Not really that necasary on our heavier 70 to 80 mph machines.

The Pressure release valves in the pro helm are set at 1500psi as oposed to 1000psi for the standard helm. There are some other internal differences to do with the non feedback mechanism but i'm not sure what these are. Its not just the pressure rating though.

And as burty all ready said the pro comes with kevlar reinforced hoses to handle the increased operating pressure and also to improve response. They wont expand/bulge nearly as much as the standard ones.
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Old 20-08-2005, 11:09 PM   #12
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Good info ladies, thanks!
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Old 20-08-2005, 11:14 PM   #13
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Both setups are rated to 300hp.

normal seastar is rated upto 60mph

Pro is rated to over 60mph but is not recomended for over 75 mph. However thats just Teleflex playing it safe, the yanks use it at over 100mph with no problems. If you are going to run very quick though I would recomend replacing the tiller bolt with an uprated ARP item. I believe mercury actually has a part number for such a bolt. Will see if i can dig it out!!!
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Old 20-08-2005, 11:16 PM   #14
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Tada!!!!!!!!!

The following are all ARP steering bolts (all the same material, just different lengths)

Mercury #
10-849838 = 1.25"
10-875273-138 = 1.38"
10-875273-150 = 1.50"
10-875273-162 = 1.62"

Had it saved on my machine in a text file called 'usefull info'
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Old 20-08-2005, 11:21 PM   #15
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Thats good JBD you may well of saved some lives with that info
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Old 20-08-2005, 11:22 PM   #16
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I know!!!

So really then, that kinda makes me like a sort of a Super Hero!!!!!
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Old 21-08-2005, 12:11 PM   #17
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Thanks for the info looks like the standard system then
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