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1962 28ft M.E.M.C.O. Sportfisher Restoration

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1962 28ft M.E.M.C.O. Sportfisher Restoration

Old 03-15-2019, 03:43 PM
  #2661  
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Originally Posted by 28memco View Post
The bolt on the left is the new metric nut I just purchased and the one on the right is one of the old nuts that came off the exhaust manifold. The thread pitch on both of them look identical
how do they measure? You can roughly identify visually. You canít verify them though. Either put a thread gauge and caliper on them, or check manually. Those screw in deals at the bolt store are very subject to wear.
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Old 03-15-2019, 03:45 PM
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Originally Posted by autobaun70 View Post


how do they measure? You can roughly identify visually. You canít verify them though. Either put a thread gauge and caliper on them, or check manually. Those screw in deals at the bolt store are very subject to wear.
something as old as that should not be metric Try 3/8Ē x24 it should be correct
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Old 03-15-2019, 04:28 PM
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Originally Posted by gmiller0737 View Post

something as old as that should not be metric Try 3/8Ē x24 it should be correct
BINGO


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Old 03-15-2019, 04:30 PM
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Thank you to everyone that chime in about the manifold nuts. Big thank you to GMILLER for giving me the correct size. Everyone who keeps this thread going is a BIG help to me.
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Old 03-15-2019, 05:48 PM
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Nobody mentioned it but if you have access to a tap and die set it might not hurt to chase the threads.
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Old 03-15-2019, 07:08 PM
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Originally Posted by 72barracuda View Post
Nobody mentioned it but if you have access to a tap and die set it might not hurt to chase the threads.
I've never heard of that. What's that and what's it's for?
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Old 03-15-2019, 07:13 PM
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If you have room you might want to use a flange nut like this:

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Old 03-15-2019, 07:29 PM
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Originally Posted by ibewerik View Post
If you have room you might want to use a flange nut like this:

I don’t think I’ll have enough room for that. When I put the nut onto the stud before I start threading it on there’s literally no room/space behind the nut. I’ll take a picture when I go to install the manifolds.
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Old 03-15-2019, 07:54 PM
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Run a 3/8” thread tap slowly in the holes and clean out the threads
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Old 03-16-2019, 04:24 AM
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I was in the garage looking over the exhaust manifolds and noticed a problem between the old manifold and the new one. The old manifold has a thread hole for the carburetor tube that goes from the carburetor to the manifold but the new manifold doesn’t have a hole for this. Any suggestions?
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Old 03-16-2019, 04:36 AM
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Each motor has a total of 3 sensors. The sensor in the back of the motor you all said connects to the temperature gauge on the helm (picture below), the sensor on the side of the motor is for low oil warning (no picture provided), and thereís one more sensor in front of the motor in the housing that holds the thermostat. What this sensor is for and what do you think it connects to?

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Old 03-16-2019, 04:45 AM
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I have to install a plate/cover on this side of the manifold. This side of the manifold is like a dead end street because nothing happens on this side of the manifold. Since nothing connects to this side of the manifold thatís why a plate/cover goes over this side to seal it off. If I make a seal/gasket by running a bead of this gasket maker around the end of the manifold and the plate/cover that will attach to the manifold do you think that gasket will hold up over time against salt water/heat?


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Old 03-16-2019, 04:58 AM
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I love Jamestown Distributors penetrating epoxy. It does a very good job penetrating through the grain of the wood and sealing it up. Once the wood cannot absorb any more epoxy thatís when you know the wood has sealed up good and thereís no need to apply any more coats of epoxy.

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Old 03-16-2019, 05:12 AM
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I was suppose to clean/paint the engine compartments a few days ago but I had to work more time at the fire station than I usually have to so I wasnít able to get this task done. Yesterday me and my daughter cleaned (soap/water) both engine compartments and allowed them to air dry. Today after I run a few errands looking for boat parts I plain on putting on the 1st coat of bilge paint. Once two coats of paint has been applied Iíll be done with the engine compartments and moving onto the wheelhouse.


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Old 03-16-2019, 06:32 AM
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Originally Posted by 28memco View Post
I have to install a plate/cover on this side of the manifold. This side of the manifold is like a dead end street because nothing happens on this side of the manifold. Since nothing connects to this side of the manifold that’s why a plate/cover goes over this side to seal it off. If I make a seal/gasket by running a bead of this gasket maker around the end of the manifold and the plate/cover that will attach to the manifold do you think that gasket will hold up over time against salt water/heat?


Ultra Copper is good stuff, but I always used it in conjunction with header and collector gaskets. I'm a little skeptical about it being used as a standalone gasket??? Personally, I think there should be a gasket between the end plate and the manifold.
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Old 03-16-2019, 06:56 AM
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Originally Posted by 28memco View Post
I've never heard of that. What's that and what's it's for?
Just a way to clean up the threads before assembly.
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Old 03-16-2019, 07:05 AM
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I need to make a 1/8 tap into the new manifolds. Do anyone know what size drill bit i need for a 1/8 tap?
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Old 03-16-2019, 07:44 AM
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21/64 drill

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Old 03-16-2019, 08:16 AM
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The front sender is allmost certainly water temp, don't know why there would be two (including the one at the rear of the head)
The hose and fitting under the carb mounting flange would be for a pcv valve set-up of some kind. Refer to your earlier engine pics to see how it was connected. The manifold without that port would be the older one , pre emission era.
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Old 03-16-2019, 08:26 AM
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Not to discourage you, but I would defer to your mechanic for running a tap into the motor and manifolds. Very difficult to fix if you break off a tap and donít have a shop at your disposal, and it is very much a feel thing.
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