Perkins compression tester?

Discussion in 'Main Morgan 38 Sailboat Forum' started by Keefer Douglas, Jul 11, 2019.

  1. Keefer Douglas

    Keefer Douglas Member

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    Started out the Spring with a seized injector pump. Finally got that rebuilt, reinstalled, fuel now getting to the injectors, but engine still won't start.

    Pulled out the injectors, had them tested - injectors are fine. So now the mechanic wants to test compression but can't find his tester for our 40 year old engine.

    Anybody got one or know someone who does in the mid-Chesapeake region?

    Incidentally, the engine ran great before any of this. The primary (Racor) filter was absolutely filthy when replaced. Previous owner apparently had neglected it. Haven't noticed any water in the fuel but there is a fair amount of sludge in bottom of the water separator cup, and some more evident in the cylinders when I pulled the injectors.

    Here we are with half the season gone, staring down a lost year. Any help or advice would be greatly appreciated!

    -Keefer
     
  2. jimcleary

    jimcleary James M. Cleary

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    Keefer

    Do you have the Perkins or the Yanmar? I only know the Yanmar. When you reinstall the injector pump, there is a connection to make inside the block that is very difficult to reach with the engine in place. That connection links up the governor control. Maybe that connection was not correctly made and it is preventing the engine from starting? This is just a guess on my part.

    Jim Cleary
     
  3. Keefer Douglas

    Keefer Douglas Member

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    Hi Jim,

    It's the Perkins. I was not present for the injector pump re-installation, but I trust the guy who did it - he has long experience with Perkins engines. I will ask him about the governor though, as much for my own education as anything else!
     
  4. jimcleary

    jimcleary James M. Cleary

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    Keefer

    Again I only know the Yanmar. When I had the injector pump seals replaced, the reinstall, which should have taken 30 minutes ended up being 3 hours because I couldn't get my fingers into the engine to make the connection and I had to do the job via a mirror to see. Very frustrating. Other then that I don't have a clue that can help you. Sorry to hear your summer is in jeopardy.

    Jim
     
  5. bwilliams

    bwilliams Marvin (Bill) Williams

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    When you crack the fuel lineconnections at the injectors and then crank the engine, do you get fuel dripping at the connection ? Also, are you getting solid fuel strean on the injector pump bleed connection when cranking the engine ?
     
  6. Keefer Douglas

    Keefer Douglas Member

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    Yes to both. Prior to the injector pump rebuild, there was fuel at the pump bleed point, but not the injectors. Now plenty of fuel getting to the injectors, and presumably through them as well since they tested OK.
     
  7. schlepper

    schlepper John m. Harrison

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    I'm going to go out on a limb here and say it's your timing on the IP... if it was running fine before but quit with a faulty IP, a seized one at that, then I cannot imagine you are all of a sudden lacking compression to even start it. Unless you were burning oil wholesale when it was running before the IP fail, then I'd say it's a timing mark issue. If clean fuel is getting to the injectors, it should start. My Perkins has about 5,500 hours on it and it starts up on first crank every time... and like yours it has no glow plugs.... My current issue with my engine is I have what I think is a bad seal on the front of the injector pump or the diaphragm is perforated on the lift pump as I am getting diesel down in my oil... hence my 'runaway Perkins' post from last week. Once I get that resolved, I'll post up the final fix... I love my Perkins otherwise....
     
  8. schlepper

    schlepper John m. Harrison

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    and by the way, the IP probably seized from the dirty fuel. From what my mechanic told me when mine started to go out on me (but it was still running, just very rough and smoking like crazy), the tolerances on the pumps are very fine. If you had a flood of debris get to the pump from the fouled filters, that could have been what caused it to seize. I just had my fuel polished and the tank cleaned. I was stunned at the fine dirt and particulate that the filtration caught from my fuel tank and the fuel. I had been told to do that but just didn't get around to it. All my guy had to do was pull of the manual fuel gauge (6 phillips screws) and he was able to drop his hoses down in there and do his thing... I highly recommend having that done.... it will save you engine problems down the road.
     
  9. jimcleary

    jimcleary James M. Cleary

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    John might have the right idea. On the Yanmar injector pump the timing was set by the number of shims placed between the pump and the block. Maybe (if the Perkins is the same) the proper number of shims were not put in place. As John says, if the injectors are getting clean fuel, it should start.

    Jim
     
  10. jimcleary

    jimcleary James M. Cleary

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    Any luck getting it started???

    Jim
     
  11. rickdowe2

    rickdowe2 Richard Dowe

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    Keeper, I have to agree with John. It ran fine before should run fine now. I rebuilt my Perkins and had the pump and injectors rebuilt. It started up and had other issues but while it was out on my garage floor I went over the whole timing system by the book including removing valve cover and rocker so I could find top dead center on the piston than I believe rolling it back so many degrees. At that point on the I.p. window it will be aligned with a mark, which it was. If the unit was set correctly on the bench it should be good but the engine has to be set correctly before installing.
    Mine has a manual fuel shutoff. Did the springs get reattached? Sounds so because you have fuel? But?...
    Rick
     

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