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  1. R

    Low voltage on MEP 803a

    Does your machine have the quad fuse mod. to the left of the regulator? If so, test the fuse. If not, install the fuse mod before going further....
  2. R

    Ambac M-50 Rebuild w/ pics (MEP-003A)

    If you end up fixing the old one, post up what size o-ring was required, it will help someone else one day!
  3. R

    Always trust the TMs

    All the solutions in that section look pretty funny / obvious, but the ghost takes the cake!
  4. R

    802A engine fuel pump

    Careful with the $25 China pumps. I used a couple of them and none lasted very long, so keep another spare on hand at all times. the universal Airtex pumps are much more reliable and not very much more money, if you can find them in stock.
  5. R

    Ambac M-50 Rebuild w/ pics (MEP-003A)

    Just drop it in and go! Only thing is you have to remove the IP to swap the control unit so make sure you set the engine on the #1 compression stroke's PC mark, remove the IP with a 1/8" drill bit inserted into the side hole, then reinstall in reverse after swapping the control unit. Nothing...
  6. R

    Ambac M-50 Rebuild w/ pics (MEP-003A)

    GA 1085 is the external one. They don't list the internal because it's part of CU8514A You'll have to separate the 2 halves of the assy. and see what size o-ring fits in there correctly. If you have any trouble finding one locally I often use...
  7. R

    Ambac M-50 Rebuild w/ pics (MEP-003A)

    Hold on a second folks.... He is correct, the throttle control is considered non-serviceable but can indeed be fixed with a welder! So, the assembly ( which can still be purchased if you can find it ) CU4514A has an internal o-ring which is the one that usually leaks, because that is the one...
  8. R

    MEP-80X Blow by

    I'd say the best known stiction eliminator is Hot Shot's. it's a bit pricey but I know a lot of diesel guys who swear by it...
  9. R

    MEP-803A Cogeneration/CHP Combined Heat & Power

    Another thought is: I've had a few 802's and 803's with the arctic heater kits in them, but there is no need for them anywhere near me, so I removed them and sold them as a complete kit. To put it back to original I removed the modified freeze plug and put a normal one back in it's place...
  10. R

    MEP-803A Cogeneration/CHP Combined Heat & Power

    If you look at the area near the coolant temp sensor, many machines have a hose fitting that is capped off, I believe that would serve as a feed line out, then the fitting in your lower radiator hose could be your return. Just have to check your machine, some have rubber caps on the fitting and...
  11. R

    MEP-803A Cogeneration/CHP Combined Heat & Power

    I'm curious about this project as well. I have to wonder IF the engine would actually run too cool or not regardless of how you extracted the heat, as long as you leave the thermostat in place and use only the radiator / hose portion of the generator for the hydronic supplement. I would think...
  12. R

    Mep 803A

    LITD is correct, that synchronizer allows you to set the phasing of 2 machines in sync ( or very close ) then shift the load on the fly. They are not set up to run 2 units in parallel. A few guys on the internet show that it can physically be done, but the 5K and 10K machines are not designed to...
  13. R

    MEP 831A

    Another option might be to use the engine and swapping out the inverter and alternator for a 4500W generator head, @kloppk used to sell a kit to do so, but I believe he recently posted the info on where yo source the generator itself and I believe he still sells the electronic pieces necessary...
  14. R

    Mep 803A

    Not the first time I've seen that. Years ago there were a whole slew of rolling 803's at auction up at Ft. Bragg and all of them had the tags ripped off. I also got a few elsewhere where the tags had been cleanly removed by drilling the rivets out, someone planned to reuse ( or sell ) those tags...
  15. R

    MEP803a Rough Idle

    Once you get the linage sorted out, if the issue remains, refer back to post #8 I still think you should verify the governor droop setting before you go any further. Start by checking the easy stuff, then if that fails, go in deeper!
  16. R

    MEP803a Rough Idle

    You guys are misunderstanding how that lever works. It's not part of the governor control system, it's the fuel on/off lever and only has 2 positions, full counterclockwise against the stop screw for fuel OFF and full clockwise against the other ( lower ) stop screw for fuel ON. It does no move...
  17. R

    MEP803a Rough Idle

    It probably has no effect related to his problem, but you're right, something is wrong with the way the FSS arm is bolted on. Should be a single bolt ( usually with a black knob on the nut ) that's free to slide in the slot. That thing looks like it's got 2 bolts in it. As long as the lever if...
  18. R

    MEP803a Rough Idle

    Just a couple more questions, was there a load on the generator in the beginning of the video? If so, how much? The load meter was reading zero and I could hear the same cyclical engine sound both before and after you hit the circuit interrupt switch. Also, there was no change in HZ reading so I...
  19. R

    MEP003A frequency meter in-op

    Look at the face of the meter, I believe the lower right side, you should see something that says FS XXXXX That will tell you what the meter is looking for signal wise for a "Full Swing" of the needle. If I recall, the 003A uses a DC mA signal perhaps 100 or 200 mA but its listed on the face of...
  20. R

    MEP803a Rough Idle

    I'm hoping that by "Idle" you mean running at operating speed, but at no load? That is fairly Typical of a machine with an oversensitive governor. They do tend to start normally and run fine when "cold" then start acting up when they are at operating temperature. Usually you see the issue more...
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