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1990 Evinrude VRO 70 hp cuts out

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  • 1990 Evinrude VRO 70 hp cuts out

    My 1990 Evinrude VRO 70 hp dies completely.sometimes it will run for hour, but if i give it a short rest it will cit out completely when I power up. No warning horns, oil getting through. it is almost like a complete fuel starvation, but pumping bulb does nothing. Any ideas

  • #2
    Re: 1990 Evinrude VRO 70 hp cuts out

    I looked at your post with interest, as I have the same engine (see post on temp sensor failure posting futher down in this list)Though I am no mechanic, Sounds like a vapor lock in the fuel line to me. We used to have a similar propblem with an old OMC inboard we owned.Maybe this will get you back to the top of the list and some qualified mechanics can comment. Best of Luck!

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    • #3
      Re: 1990 Evinrude VRO 70 hp cuts out

      I have thought about this. Is the bulb supposed to be soft or hard when running. On this engine it goes soft and is easy to pump when running. What can cause this vapour lock then. There is no breather on the tank and I presume it vents automatically. If you take the tank lid off there is pressure. Also if you take a plug out when it quits it is dry. Does this rule out spark failure.Thanks

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      • #4
        Re: 1990 Evinrude VRO 70 hp cuts out

        Another problem is the warning horn works, but is very quiet. Is this an easy thing to fix ???

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        • #5
          Re: 1990 Evinrude VRO 70 hp cuts out

          Regarding the quiet warning horn...mine was installed inside one of the rod lockers at the factory. I cut out a hole and mounted the horn right next to me. Very loud now.

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          • #6
            Re: 1990 Evinrude VRO 70 hp cuts out

            is your gas tank vented bulb should be hard when running fuel filters rarely a problem maybe some debis in fuel line or carbuerators

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            • #7
              Re: 1990 Evinrude VRO 70 hp cuts out

              There should be no pressure in the tank when you remove the cap. Check the vent. Is it a portabe or built in tank? What octane fuel?Good luck!

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              • #8
                Re: 1990 Evinrude VRO 70 hp cuts out

                This is not good, Phil. You have the same problem running on two different threads under two different user names. You have us working against each other.You have a hot short in your ignition system.When you "give it a rest" temperature peaks before it begins to cool. Since all cylinders quit firing it is almost certainly your power pack.Red sky at night. . .JB
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                • #9
                  Re: 1990 Evinrude VRO 70 hp cuts out

                  Good catch JB. Thanks.

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                  • #10
                    Re: 1990 Evinrude VRO 70 hp cuts out

                    JB Sorry about the two names, not quite got the hang of this.without sounding a complete idiot, what'sthe powerpack ??Thanks

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                    • #11
                      Re: 1990 Evinrude VRO 70 hp cuts out

                      DhadleyPortable tank and running on +90 ron unleaded. No vent screw on top of tank. Thanks

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                      • #12
                        Re: 1990 Evinrude VRO 70 hp cuts out

                        Ah !!! A friend has just told me "powerpack" would be the "battery " in England.Should I give up and go and buy the dress ????

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                        • #13
                          Re: 1990 Evinrude VRO 70 hp cuts out

                          No need for a dress. . .yet, Phil. The powerpack is the module in your ignition system that sends medium voltage pulses to the coils that fire the spark plugs. It is not repairable and correct testing requires special equipment. You can test it this way:Take the bonnet off and fire your engine up on a hose feed. Use a hair dryer to heat the various parts of the ignition until the engine quits. The last part you heated has the hot short. Replace it. This may not work, but it is worth a try.ORBorrow a powerpack and replace yours for testing purposes. Problem gone? buy the powerpack.Good luck and let us know what happens.Red sky at night...JB
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                          • #14
                            Re: 1990 Evinrude VRO 70 hp cuts out

                            Phil,Jb probably has the right of this in your case. Also you may have more than one problem. If the fuel bulb goes extremely soft and the plugs are dry after the motor quits you could have a bad fuel line from the tank to the motor or a bad internal line which is drawing air instead of fuel. Thoroughly inspect the fuel lines for age cracks or loose connections at the VRO. I have also seen a pulse limiter valve gum up and restrict the amount of vacuum that the VRO has to work with. Good luck. Post your results.

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                            • #15
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                              Re: 1990 Evinrude VRO 70 hp cuts out

                              Okay boysI checkked the fuel lines. Everything seems ok, so I snuck upstairs and stole the wife's hairdryer. Hose pie onto the engine and started her up. No Problem. Runs great on the drive. I heated about every bit of engine I could. The neighbours are all staring at me by now, when in the back of my head I could hear JB chuckling " He's doing it, the fat english fool is standing , heating an Evinrude with a hairdryer !!!" when the **** thing quit on me.Unfortunately the hairdryer, not the Evinrude!!!!Tripped the power again and blow dryed my motor. Long and short of it there is a black sealed box with wires on that seems to distribite to the plugs. Heat this up, engine stops. Is this the power pack ??

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