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  1. #1
    ReggieFilm's Avatar
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    Lightbulb Overhauling LRV with a 4 tec

    Greetings. A Noobie here. I've had my SeaDon't LRV for going on 9 years now. It only ran the first three out of those 9! If SeaDoo made the LRV with 4 strokes, I'd already have one. So I've now purchased the "guts" from a 2004 RXP and plan to "upgrade" my LRV to a 215hp from the standard 135hp original. I'm already doing research on the computer/electronics end. Does anyone know the differences between the 2 and 4 stroke systems? They both employ the mpems. Is there a separate computer running the fuel injection for the RXP or is it all in the mpem box? It would be so nice if my digital gauge on my LRV would integrate with the new 4 stroke engine. Any thoughts on the how to make them talk? (Please spare me the whole it-can't-be-done spill. It can... it's just a matter of how; even if I have to change to the RXP cluster)


  2. #2

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    Everything from the RXP would have to go into the LRV. The motor, electrics, wiring harness, fuel tank, ECU, RXP cluster and so on.

  3. #3
    ReggieFilm's Avatar
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    That's kinda what I was thinking. Not so sure about the fuel tank though... I like my 25 gal tank. Does the rxp have a fuel pump in the bottom of its tank? The harnesses are the same for some parts and my train of thought is that the cluster on my LRV has the same information points as the RXP; such as Lake Temp, RPMs, Engine Temp, etc. I also have the buttons for start, mode, and reset.

  4. #4
    if you keep the bigger tank make sure the 4tec fuel pump reaches to the bottom of the tank or you are just wasting time with the bigger tank. The 4tec is on a CAN system nothing from the lrv will work with it.

  5. #5
    ReggieFilm's Avatar
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    I'm not sure what the CAN system is. But my tank is actually shorter so I'm having a company make me an HDPE plastic collar to weld to my existing tank. This has become quite an endeavor. I will post pics soon, documenting this whole process.

  6. #6
    If i knew,...I wouldn't ask sea-one's Avatar
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    Dont forget bout the driveline,...drive shaft length,motor mounts and so on,....also guys, will he need the larger 4tec pump or not?
    I guess he'll run an open loop system?

  7. #7
    ReggieFilm's Avatar
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    So it's been a while since I've posted but the engine is INSTALLED and cranks. I used my 25gal tank and maintained a closed cooling system with an additional heat exchanger for the engine coolant in addition to the intercooler on the air intake. The exhaust has been a huge pain but moreso than that was moving and re-fiberglassing the motor mounts. The jet drive was also changed to accommodate the larger shaft. The old thru-hole in the floor of the ski works with the larger shaft (I got lucky). The pump is off the RXP but I was able to bolt up the jet steering assembly (also another stroke of luck!). I ordered the Deustch connectors and soldered the wire harnesses to make them easily (and flawlessly I might add) in with computers and new cluster. The check engine light came on and the only code I had was where I had yet to wire in the compass! I have a few things left on the craft but one more weekend and I should be on the water

  8. #8
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