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Old 25 May 2014, 16:23   #1
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Mariner/yamaha 55. short shaft?

Does anyone know if the old yam/mariner 2cyl 55's came in short shaft?
Thinking about getting one as a project
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Old 25 May 2014, 16:27   #2
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Yes they did.
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Old 25 May 2014, 16:41   #3
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Yep, as above.

Dad had one on a Mk1 Simms SuperV speed boat in the late 70's.
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Old 25 May 2014, 16:43   #4
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Great engine, very eager to hit maximum.
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Old 26 May 2014, 04:21   #5
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Cheers.

What about tiller control? I have a long shaft one here but I can't see how to change gear unless you were running cable control.

I'd need to adapt it for using on a thundercat
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Old 26 May 2014, 05:36   #6
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Mariner/yamaha 55. short shaft?

You'll need the proper factory tiller kit, pretty rare now I would have thought
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Old 26 May 2014, 06:52   #7
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If you go to crowley marine In the us. You will find the tiller online. They will be in the Mariner 48hp version. They sold these up to 1991 in the us and are still available. Prices are no different to a control box and costs 30 usd to ship. The 55 short shaft would have been around 1976 - 1978. Although the still made them for the 60d racing yamaha. If you are stuck, PM me and I will search the crowley website to find the right one.
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Old 26 May 2014, 09:38   #8
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Thanks for the help,

It would need an extended tiller anyway (the same as the tohatsu 50's get for thundercat racing). So I could probably just use any old tiller and mount it onto the extension.

Are the yam 60 2cyls the same as the 55s?

I've checked the gearbox off the one here and it's got the 1.84 ratio box. apparently you can get 1.71 gears for them, the same as the 70CES. Don't know where you get the gears though
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Old 26 May 2014, 15:53   #9
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Yamaha 55 - bore/stroke 82x72mm & 13.24 gear ratio. Yamaha 60 - 84 x 72mm & 14.24 gear ratio. Engines are different. Yamaha 60d racer was different still and like hens teeth. I have one which was sold as 60d but is not, although the exhaust and one carb (factory bored) is. A1an on here has a mint 60 block if it helps and I have the sport exhaust. And one carb!! 60d revved out at 7000 rpm, I think!
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Old 26 May 2014, 15:54   #10
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If you use a 55 gearbox with a 60 block, it will spin faster.
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