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  • Made up some linkages and hit up the scrapyard for some parts to make a runner.

    Got it spinning, a lot of afterfire and some backfire. Found the exhaust valves stuck open (common in this motor)


    So now it seems the timing is 180 off or maybe 360 as the intake sounds like the exhaust. Switching the plug wires gets the puff out the exhaust. More to do
    Last edited by plastikosmd; 07-15-2018, 07:51 PM.
    "Good judgment comes from experience, and often experience comes from bad judgment" R.M.Brown

    My shop tour www.plastikosmd.com

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    • Ok running like a top, I have to time it, cut shaft for pto and add a generator circuit


      Video of it Running:
      https://youtu.be/O_aFDIgM5pI
      "Good judgment comes from experience, and often experience comes from bad judgment" R.M.Brown

      My shop tour www.plastikosmd.com

      Comment


      • Originally posted by plastikosmd View Post
        Ok running like a top, I have to time it, cut shaft for pto and add a generator circuit


        Video of it Running:
        https://youtu.be/O_aFDIgM5pI
        Nice job getting her running! I assume you're running it without an exhaust? Looks like exhaust manifold into a SCH40 pipe for the test run? It must have been loud as hell

        Comment


        • I hope that crack in the fins does not extend into the exhaust port.

          Originally posted by plastikosmd View Post
          Made up some linkages and hit up the scrapyard for some parts to make a runner.

          Got it spinning, a lot of afterfire and some backfire. Found the exhaust valves stuck open (common in this motor)


          So now it seems the timing is 180 off or maybe 360 as the intake sounds like the exhaust. Switching the plug wires gets the puff out the exhaust. More to do
          “I know lots of people who are educated far beyond their intelligence”

          Lewis Grizzard

          Comment


          • Originally posted by Dave C View Post
            I hope that crack in the fins does not extend into the exhaust port.
            It doesn't look like a crack to me, it looks like cosmetic casting ridges from the mold to me.

            Comment


            • Could be, and I thought so at first; but it looks like a section of some fins further back is missing. Maybe the block took a hit at some point breaking that section off, and possibly causing the crack. I hope you are right. My eyes are not what they used to be.
              Originally posted by 3 Phase Lightbulb View Post
              It doesn't look like a crack to me, it looks like cosmetic casting ridges from the mold to me.
              Last edited by Dave C; 07-16-2018, 05:15 PM.
              “I know lots of people who are educated far beyond their intelligence”

              Lewis Grizzard

              Comment


              • Originally posted by 3 Phase Lightbulb View Post
                It doesn't look like a crack to me, it looks like cosmetic casting ridges from the mold to me.
                This would be my guess as well. If you look closely you can actually see the casting line extending down underneath the ridge into the remaining fins.
                Home, down in the valley behind the Red Angus
                Bad Decisions Make Good Stories​

                Location: British Columbia

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                • Well, my mistake. If it's running like a top, it must be casting flash and not a crack. Just call me Debbie Downer.
                  “I know lots of people who are educated far beyond their intelligence”

                  Lewis Grizzard

                  Comment


                  • Originally posted by Dave C View Post
                    Well, my mistake. If it's running like a top, it must be casting flash and not a crack. Just call me Debbie Downer.

                    Comment


                    • Will look, didn’t note a crack and runs well
                      Will follow up
                      "Good judgment comes from experience, and often experience comes from bad judgment" R.M.Brown

                      My shop tour www.plastikosmd.com

                      Comment


                      • It's just a mould flash/misalignment from the mould segments that allowed the inlet and exhaust passage cores to be placed. Much the same as the one where the moulds were split to allow the cylinder cores to be placed.
                        Location- Rugby, Warwickshire. UK

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                        • Flashback 3 weeks: In order to answer a question about my "set true" stye chuck I took it off the lathe and promptly dropped it on the concrete. Nothing appeared broken so I put it on the shelf. For that last three weeks it haunted me that I might have bent something internally.

                          Today I mounted it again and ran it through it's paces. I turned a 4 inches of a 6 inch long bar down to .75 diameter to use as a test bar. After aligning the chuck with the bar I had about .0003 TIR. I remounted the bar 5 times and it was never worse than that. Just for grins I chucked up a 1 inch and a 1/2 inch ground bar. Both were within .001TIR without adjustment.


                          It looks like I lucked out and there were was no damage. I'd post pictures, they are pretty boring when you can't see the needle move. )
                          At the end of the project, there is a profound difference between spare parts and left over parts.

                          Location: SF East Bay.

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                          • Originally posted by 3 Phase Lightbulb View Post
                            Good one
                            “I know lots of people who are educated far beyond their intelligence”

                            Lewis Grizzard

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                            • What did you do today?

                              Out hanging out in my shop this morning.

                              Finished up my clone tripod mount for my camera photo below
                              Also knocked out a tool tray for the mill. Since the mill and the lathe are so close it probably be used for both.
                              Also made a bushing to use a small insert boring bar on my Shars boring head. I didn’t take a picture of that.

                              Just hanging out

                              Sent from my iPhone using Tapatalk

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                              • Busted into a box of Lays Ketchup chips that arrived today. Cost well over $1 per bag, but so worth it

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