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Old 04-18-2013, 05:44 PM
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Default 1963 100hp mercury outboard

Hi, my apologies if this should be in the parts forum but there is currently listed on the oz fleabay site a 1963 100hp mercury that looks pretty mint and would probably suit someone building a vintage boat.

I haven't seen the engine nor know the vendor but given the passion herein for restorations I suspect this may perhaps help someone.

If you need local help drop me a pm and I will try to assist.

Kind of looks like something I should stick in the shed and forget about for another 20 years but how many toys should one acquire??
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Old 04-19-2013, 07:40 AM
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Does look very nice - and the first ever 100hp outboard from the first year of production? - also if I'm not mistaken the first all black Mercury?

A collection of vintage outboards would be on my 'lottery win' list.

Wonder what it's like pulling that pull start on a 6 cylinder engine?!
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Old 04-19-2013, 07:54 AM
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I imagine you'd be hoping like all heck it starts first pull!
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Old 07-22-2013, 07:22 PM
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Wonder what it's like pulling that pull start on a 6 cylinder engine?!

I had two different Merc 6 cylinders on my boat in the 70's and 80's. The orig. - 100 hp and eventually a 90 hp replacement. Being younger and foolisher I often fished all night and only had one battery. I lengthened the starter rope that came with them and found that if you set the throttle and choke correctly it would always take less that a full revolution of turn with the rope and they'd be up and running. Not as hard as you'd think. And I'm not a particularly big guy.

Ron
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Old 07-22-2013, 08:04 PM
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I think the first 100HP was around 1960-61. We had one on an 18' Lone Star.
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Old 07-23-2013, 04:00 AM
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I think the first 100HP was around 1960-61. We had one on an 18' Lone Star.
We were both wrong - it was 1962, but it was the introduction of the all black Mercury:
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Old 07-23-2013, 05:23 AM
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The early inline 6 mercs had a compression release for pull starting. The engineering downfall of those motors was the lack of cooling water to the top cylinder. We owned several from 80 hp to 115 until finally we had to give up. They offered a different impeller and some other mods but nothing worked. Mercury marketed it as the "Tower Of Power" they had loads of torque and being so narrow they worked very well in multiple engine installations. there are the remains of 4 or 5 of them behind my warehouse if you need parts.
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Old 07-26-2013, 04:51 PM
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The early inline 6 mercs had a compression release for pull starting. The engineering downfall of those motors was the lack of cooling water to the top cylinder. We owned several from 80 hp to 115 until finally we had to give up. They offered a different impeller and some other mods but nothing worked. Mercury marketed it as the "Tower Of Power" they had loads of torque and being so narrow they worked very well in multiple engine installations. there are the remains of 4 or 5 of them behind my warehouse if you need parts.
I never saw any compression release, but like I said just pull the manual choke on, advance the throtte a little and it was up and running in the blink of an eye using the rope.

Mine eventually developed multiple water jacket leaks which is why I gave up on it. It sure sold me on JB Weld though. Dealer said that batch of Mercs used aluminium with too much copper in the mix which would corrode.
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Old 07-26-2013, 05:34 PM
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Could be back then Mercury was concentrating on fresh water and small wonder given their corporate address. Their metallurgy as in the beginning of a long learning curve. My Son in Nashville has an old Glasstron with a 6 cylinder 115 and he uses it frequently.
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Old 07-27-2013, 10:54 AM
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Could be back then Mercury was concentrating on fresh water and small wonder given their corporate address. Their metallurgy as in the beginning of a long learning curve. My Son in Nashville has an old Glasstron with a 6 cylinder 115 and he uses it frequently.
The other great thing about them is that they idled like a sewing machine at 600 rpms. I can only slow my 115 4 stroke down to 800 - thanks to the computer - and even then it vibrates more than my two stroke ever did.
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Old 07-27-2013, 12:09 PM
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We did lots of trolling with the old I 6s and they were very smooth.
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