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2002 virage tx

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  • 2002 virage tx

    I recently put a rebuilt motor in my 02 virage tx. I can not get it to start, it just backfires through the exhaust when it almost starts. All cylinders have spark, compression, and fuel. The timing is very close to being correct if it isn’t spot on.

  • #2
    Is this a fuel injected engine or carburetor?
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    • #3
      Carb

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      • #4
        Originally posted by Bgjohnson
        … it just backfires through the exhaust when it almost starts. …
        Do the single cylinder at a time check. See if it will ‘almost start’ with each cylinder, by itself

        Sometimes the firing order in the ignition can get mismatched with the firing order of the crankshaft.

        First try the MAG cylinder at the front of the engine, with the other two spark plugs disconnected.
        It should be able to start and run (roughly) with just the front cylinder firing. Might have to squeeze the throttle a bit and of course some choke, on a cold engine
        No water cooling
        If it starts and runs, good.
        Disconnect front spark plug. Mark it as MAG or FRONT

        Connect middle spark plug and do the same test
        It should also start and run, albeit roughly
        If yes, mark that wire as CENter

        If not, connect the remaining plug wire to the middle cylinder.
        Redo the test
        If THAT plug wire runs the engine, mark it as CEN

        Disconnect the middle and front spark plugs
        Connect the rearmost cylinder to the only not-yet-marked plug wire
        Engine should start and run

        At each step, if one of the cylinders cannot fire up the engine, fix that problem before continuing with the other cylinders

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        Yamaha NanoXcel hull repair info
        Polaris PWC useful info

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        • #5
          You are the man. Took it out today, no problems.

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          • #6
            Originally posted by Bgjohnson
            ... Took it out today, no problems.
            What was the problem cause? And the fix?

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            Asking for help via Private Message?
            For Ficht EMM Repairs, contact Lakeside Tech
            Yamaha NanoXcel hull repair info
            Polaris PWC useful info

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            • #7
              Got a really odd question. Can’t start a new thread for a Polaris 700 Virage. Am I blocked because I haven’t done so,etching yet?

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              • #8
                The center and rear plug wires were hooked up wrong.

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                • #9
                  I’m only getting about 51 mph on flat water, anything I can do to boost that

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                  • #10
                    Originally posted by Bgjohnson
                    I’m only getting about 51 mph on flat water, anything I can do to boost that
                    How are you measuring the speed?

                    There is a possibility that the backfiring caused damage to the intake reeds on CEN or PTO/rear cylinders. It is also possible that the rear crankshaft seal has been damaged.

                    Inspection might reveal damage, or not with the reeds.

                    For the rear crank seal, might be difficult to visually inspect with the driveshaft coupler installed

                    sigpic
                    How to post your question, AFTER you have done your homework
                    Asking for help via Private Message?
                    For Ficht EMM Repairs, contact Lakeside Tech
                    Yamaha NanoXcel hull repair info
                    Polaris PWC useful info

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                    • #11
                      I checked the reeds, they look good. Could it be the carbs need to be adjusted? Also would me running premixed and using the oil pump affect it at all?

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                      • #12
                        Also checking the speed with my phone,

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                        • #13
                          Originally posted by Bgjohnson
                          I checked the reeds, they look good. Could it be the carbs need to be adjusted? Also would me running premixed and using the oil pump affect it at all?
                          Checking spark plugs would tell. Read up on "plug chops" and checking "piston wash".

                          Impeller wear is one of the factors needed for speed.

                          RPM's are crucial when talking apples and oranges.

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