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LS2000 Water in Crankcase???

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  • #1

    LS2000 Water in Crankcase???

    I have a 1999 Yamaha LS2000. Last night I got it out of storage and was going to crank up each engine in the drive way. I hooked up the garden hose to one and cranked it up. After letting it run for a few minutes at low idle I realized I had started the wrong engine. The water was flowing thru the engine that hadn't been started. I know...what a bone head! I quickly shut off the water and the "wrong" engine. The engine that was running with no water appears to be fine. I didn't overheat and with the hose hooked up to it will crank the first time you turn the key.

    My question is...what are the chances I flooded the crankcase of the other engine by running water through it without it running? How can I check to see it there is water in the crankcase? What damage may I have done?
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  • #2
    Re: LS2000 Water in Crankcase???

    WOW. You got lucky on the engine you DID run. If you really did it for 'a few minutes' it would have overheated and seized. I suspect it was a little over a minute in reality. As for your other engine, chances are...oh about 100% it's flooded. You simply check for and purge water by removing the spark plugs and turning it over. Bear in mind that if the case is full of water, you are risking blowing out the seals when you do it - there is no way around it on a boat - you obviously can't turn it upside down to drain it.


    Watch the Ride Right Video on water swampping, it shows you everything you need to know. Do this NOW or you can kiss the engine goodbye regardless of what you try.
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    • #3
      Re: LS2000 Water in Crankcase???

      I cranked the engine a few times and removed the plugs. Other than a little oil on the plugs the cylinders were dry. I installed new plugs and turned it over again and it fired but didn't start. I cranked a few more times and each time it would fire but again not start. I removed the plugs and the cylinders are still dry.

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      • #4
        Re: LS2000 Water in Crankcase???

        Just to get the terms correct: fire means you have spark while it's cranking over. You can test for this by removing a plug, putting it in the boot and holding it to the head while cranking and looking for spark. Cranking means it's physically turning over when you try to start it.

        Are you turning it over with the plugs out, or just removing the plugs and looking at them, when you say the 'cylinders are dry'? You need to pull all the plugs and try to start it to pump the water out - watch the video, now.
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        • #5
          Re: LS2000 Water in Crankcase???

          I just watched the video and it was very helpful, thanks. What I already did last night was to remove all three plugs and cranked the engine. There was no sign of water in any of them. While cranking some amount of water was discharged from the exhaust where it would normally would. I installed new plugs and tried cranking the engine. It would fire for an instant but wouldn't continue to run. I removed the plugs again and there is still no sign of water. I reinstalled the new plugs and again it would begin to start (engine would fire) but then just crank. I didn't want to push it not knowing if I was doing more damage.

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          • #6
            Re: LS2000 Water in Crankcase???

            I was using the term fire to mean when turning the ignition with the plugs installed the engine will cough and begin to start.

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            • #7
              Re: LS2000 Water in Crankcase???

              OK, then First, you did NOT run the water for 'a few minutes', rather far, far less. Second, you got VERY lucky. Just keep trying. As soon as any excess fuel or water hits the plug, it fouls and you have to dry it out or switch plugs. Make sure you aren't using the choke and flooding it. Get it started ASAP though, there is certainly a good amount of excess water/moisture in the exhaust that will make it's way up.
              SBT Tech Support is here to help with your problems.
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              • #8
                Re: LS2000 Water in Crankcase???

                I just removed all three plugs and cranked the engine once again for about 20 seconds. Still no water. I wiped to plugs off and reinstalled them. Turned the gas on and cranked the engine. After about 6 short cranks with the choke pulled out the engine caught and ran for just a second. I though GREAT, thats more like it. I thought to soon. I turned the key again and now nothing. Not a click, not a crank, just dead silence. I check the fuse as well as the battery connections and everything there is fine. While cranking the engine it appeared to turn over very freely and didn't appear to be cranking slowly at all. The engine is obviously cold as well. Is there a chance this thing just siezed or so something else more than likely wrong now?

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                • #9
                  Re: LS2000 Water in Crankcase???

                  With the plugs out turn it by hand. If it's locked, it's done. If not, you have a battery/cable/starter issue.
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                  • #10
                    Re: LS2000 Water in Crankcase???

                    I really appreciate your continued help and time and I'm sorry to ask a stupid question but how do I turn it by hand? Short of inserting somthing thru a spark plug hole and pushing down on a piston? Or is that the only way to do it? Thanks!

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                    • #11
                      Re: LS2000 Water in Crankcase???

                      Grab the rear coupler and turn it.
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                      • #12
                        Re: LS2000 Water in Crankcase???

                        Do you have a display to see how much voltage your battery has right now? After all that cranking it might be too low to get it started by now.

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                        • #13
                          Re: LS2000 Water in Crankcase???

                          I think it's the clean out plug lid switches. They control the starter and ignition. When the lid is open and you try to start the boat it fires once but then quits sparking. I think it takes the Ignitor unit a moment to cancel the ignition when the switch fails or the lid is open. Work the switches a few times and then have someone hold them down as you crank the boat........

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                          • #14
                            Re: LS2000 Water in Crankcase???

                            David3aces was right on with my boat, give it a go
                            They call me Mr. Incredible around these parts.

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