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TOPIC: '57 Merc Refresh

'57 Merc Refresh 12 Jan 2020 20:23 #101335

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Took some time to clean my bench as the top was getting hard to see . . . Crank cleaned up nicely

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Last edit: by Moe.

'57 Merc Refresh 10 Jan 2020 22:27 #101300

That looks pretty familiar. Good luck with getting her back together. B)

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Mercury Marc, 1958 Hawk II, Merc 400

'57 Merc Refresh 10 Jan 2020 17:48 #101295

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Meanwhile I have time to pull down the crankshaft assembly and clean things up . . .





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'57 Merc Refresh 10 Jan 2020 17:41 #101294

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Well I figured I'd update this as I'm waiting for parts to arrive . . . .
I successfully pulled the engine without chipping TOO much of my paint job off.
I know these aren't heavy but it gives me a reason to use my cherry picker.



Fast forward through removing all the ancillary stuff and we're down to one rotating assembly



Dropped the block in a hot bath with some Dawn dish detergent . . . it works on baby ducks right ??



All four bores checked out within spec so a couple e-mails to Joe Poole and we should have some parts arriving soon . . . .

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Last edit: by Moe.

'57 Merc Refresh 28 Aug 2019 16:02 #98652

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HawkEyes wrote:

Moe wrote: Duly noted. I have a cyl hone somewhere . . . .
I'm not sure if my service manual specs out psi readings, will have to check.
Either way, rings can't be too pricey, as long as the pistons are in decent shape. I'm sure new replacements don't grow on trees.


Joe Poole will have them for you. Ferguson Poole Marine


Yeah I figured I'd be calling him at some point.

Joe! If your reading this I'll probably be buying more parts!

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'57 Merc Refresh 27 Aug 2019 22:19 #98618

Dang Russ, that was a sad story. :( What did you do with the motor afterwords?

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Mercury Marc, 1958 Hawk II, Merc 400

'57 Merc Refresh 27 Aug 2019 21:32 #98614

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I had a Mark 58A stop running in the barrel. It was the first start of the year and it ran for about ten seconds. The motor locked up. I pulled it apart to find one of the bearing needles had broken and decided to join in with the piston. It probably dried out from sitting and sucked up to the cylinder. The cylinder and piston were scored beyond repair. I checked other bearings with a 5x and my reading glasses and they were all pitted. At the time I was building a Mark 25 so I checked those bearings and they were pitted as well. Just be glad it hasn't sucked up a needle like mine did, live and learn I guess....

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The Rivethead formerly known as Russ

'57 Merc Refresh 27 Aug 2019 20:18 #98610

Moe wrote: Duly noted. I have a cyl hone somewhere . . . .
I'm not sure if my service manual specs out psi readings, will have to check.
Either way, rings can't be too pricey, as long as the pistons are in decent shape. I'm sure new replacements don't grow on trees.


Joe Poole will have them for you. Ferguson Poole Marine

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Mercury Marc, 1958 Hawk II, Merc 400

'57 Merc Refresh 27 Aug 2019 16:15 #98606

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Duly noted. I have a cyl hone somewhere . . . .
I'm not sure if my service manual specs out psi readings, will have to check.
Either way, rings can't be too pricey, as long as the pistons are in decent shape. I'm sure new replacements don't grow on trees.

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'57 Merc Refresh 26 Aug 2019 19:41 #98591

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If you have the motor that far apart I would replace the rings. Don't forget to deglaze the cylinders with a hoan before installing the new rings. 100 PSI per cylinder isn't very good. I have seen compression readings as high as 150 PSI on a Mark 58.
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John

1958 Vagabond II & 35 HP Evinrude
1955 PlastiCraft 12 Ft. Delux Runabout
1957 Clipper & twin 35 HP Evinrudes
1957 AlumaCraft 14 Ft. FD
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