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Recent content by zapp

  1. Z

    MEP-831A - Huge amount of exhaust smoke

    Thanks, I had a new (Chinese) pump I had gotten just in case and gave it a try. Once it fired up, it cleared the smoke for first minute or two then I started to get a little bit but nowhere what it was before. It definitely improved things. I'm wondering if there might be some left over oil...
  2. Z

    MEP-831A - Huge amount of exhaust smoke

    Video after new valve seals: https://youtube.com/shorts/kBKTWWjrx9E
  3. Z

    MEP-831A - Huge amount of exhaust smoke

    So..... I got new valve seals, rocker assembly, gaskets and some dedicated time without distractions to put everything together. Bottom line, I got it together, purged the air, and it fired up on the second crank... Still blowing a ton of smoke.. Buch of pics and couple observations and...
  4. Z

    MEP-831A - Huge amount of exhaust smoke

    I tried two different spring compressors.. One from Amazon that is the scissor type that didn't have enough travel to compress the spring, and one I bought from an auto parts place that was an Overhead spring compressor. The issue with that one was it was really for cars as it was too wide to...
  5. Z

    MEP-831A - Huge amount of exhaust smoke

    So I got the springs off and it looks to me like the exhaust valve seal definitely had a problem unless I'm missing something? The seal just tore apart into little piece and stuck to the valve hole. How much of this should be scraped away (it's like bonded to the metal)? Don't want to...
  6. Z

    MEP-831A - Huge amount of exhaust smoke

    What spring compressor are you guys using on the valve springs in these little engines? The one I have doesn't really don't fit and have no travel left to compress.
  7. Z

    MEP-831A - Huge amount of exhaust smoke

    Thanks, I've changed valve seals on a car many years ago so I'll give the seals and a new exhaust rocker arm a try. I need to measure the shaft the rocker rides on to see if it is still in tolerance to confirm. Need to read up on the ring replacements and get a little smarter on the steps...
  8. Z

    MEP-831A - Huge amount of exhaust smoke

    So I pulled the head off.. What a pain getting the exhaust off.. There has to be an easier way to get to those two bolts on the exhaust bracket on back of engine. Pics below.. Center part on piston looked wet in the center but seemed more like shiny carbon buildup. I did adjust the...
  9. Z

    MEP-831A Yanmar Fuel Injector Gasket

    Hi - Does anybody know the thickness of item #6 in the picture. I have a fuel injector missing parts 6 & 7 in the pic and I guess there are different thicknesses of the shim washer. I thought 6 & 7 might have fallen off when I took it out but I can't find them in the bottom of the enclosure...
  10. Z

    Building Jumper Cable for MEP-831A - NATO Slave O-Rings

    Hi - I picked up a pair of NATO Slave connectors and 10 feet of 2/0 wire to build a better battery jumper for my MEP-831A. There are O-Rings that came with the connectors when I opened them up. Anybody know if these are supposed to just slide over the lugs before tightening them down or...
  11. Z

    MEP-831A - Huge amount of exhaust smoke

    From the bottom dip stick. I wondered since the unit had been drained of oil/fuel when I got it if someone put oil in the top thinking it was for long term storage benefit and maybe that is what is going on? I was thinking based on 2bfeet recommendations, I'd try the following to see if I get...
  12. Z

    MEP-831A - Huge amount of exhaust smoke

    I thought it looked like oil too with the amount of smoke. I let it run and there is so much smoke that I shut it down - doesn't seem to clear up. Would a bad fuel injector pump cause this type of issue (dumping too much fuel)? I wouldn't expect this level of heavy smoke though?
  13. Z

    MEP-831A - Huge amount of exhaust smoke

    Hi - Hoping you guys can share any insights. I picked this up through GP and just got around to trying to start it. It had been drained of all fluids so I PM'd it and went to try and start. It fired up, however, there was massive smoke flowing out of the exhaust. I also noticed the...
  14. Z

    MEP-831A Neutral Ground Bond

    Thanks! I'll unhook and check continuity between N-G to confirm. I was thinking of putting a switch in place to be able to toggle when I need it bonded (stand alone) and then when I don't (connected to home). Assuming just a SPST switch rated at 240V should work.?
  15. Z

    MEP-831A Neutral Ground Bond

    Hi - I looked in the manual but didn't see reference to a removable neutral/ground bar like the 802A/803A's have if you want to hook up to a home with a disconnect. From what I read code requires only one place where neutral/ground is bonded and that is generally in the existing panel. The...
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