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  1. RedBarron55

    Steering Cables sealed and lubed??

    What happens to the air or grease as the bellows and cable is moved? I thought about adding a bellows to my Sport Jet 90 and I wondered about this. If filled with grease it would tend to swell when collapsed and pull a vacuum when extended, perhaps pulling water into the bellows. On systems in...
  2. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    Fuel pump re-reworked removing rubber check discs, leaving the plastic ones and test ran including the electric priming pump. That is the good news, but some bad news that really might be good. Checking the firing of all three cylinders with a timing light the # 1 and #2 cylinders have spark...
  3. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    When I took the fuel pump apart I found the small plastic discs and they gad bulged the rubber discs and also the thick gaskets were in the wrong place, next to the outside plates instead of next to the inner part. I have no idea if this makes any difference at all, but... With much searching I...
  4. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    I am not sure what the Optimax type pump is for sure. Mine is the square pump that is used on lots of later model Mercuries and not the figure 8 one shown in the Sport Jet manual. It looks like this:
  5. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    Today I pulled the square fuel pump off the Force 90 on the sport Jet and checked it out and it was bad! To test blow in the inlet and it should pass the air, Blow on the outlet side and it should NOT, but mine did. I took it apart and is had no torn or worn diaphragms but he had a fuel flow...
  6. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    The pump is standard for the 90 jet and it seems to be in very good and nearly new condition with no wear on the wear ring or impeller. I have seen 6 cylinder mercury jets on throw away jet boats earlier in the year for as little as $300, but they would a lot of work too. The match up for the...
  7. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    I believe you are correct. The Previous owner bought the engine as either low time or rebuilt and I think since it has to have the sport jet crank (due to different splines for the outboard) I think that it is a B@STARD made up of the sport jet crank and an outboard block. The correct year for...
  8. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    Jeff, I think that if IF the electronic problems are sorted out the Force may make a good power plant for the Sport Jet. It needs to since there are few if any other choices available! In my case if the engine hasn't been damaged with all of the water getting into it and various abuses from...
  9. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    It may have to do with the magnetic field building up from the hi current of a shorted diode and then collapsing when the engine stops and the surge may be induced into the two coils of the ignition circuit. I think that the coils share the same iron laminations and the ignition coils may act...
  10. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    Does the Yamaha Regulator come with the plug and wires? I might change the Motorcycle one out if that one fits in the original spot.
  11. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    Thanks for the reply, Jeff. I have a fuel pump kit and a small electric pump as a back up and to prime. I have bought the CDM modules for $50.00 and the harness for $25 and I am making the changes as much to simplify the system as much as anything. I can carry a spare module and regulator and a...
  12. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    Thanks for the input. You are exactly right on the voltage etc. I bought my rectifier for a motorcycle because I couldn't find a good reference for a jetski regulator. I am also in the process of updating to a CDM ignition, thinking it might be more reliable and maybe easier to troubleshoot. We...
  13. RedBarron55

    Sport Jet - Force MOSFET Rectifier Regulator

    I finally got my 90 HP Sport Jet Hobie Jet Fisherman running out on the water for a little while. I noticed that the voltage went over 18 volts and that worries me. On reading the CDI website that this engine should not use maintenance free batteries I assume because the load when charged lets...
  14. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    Ordered an electric priming pump and a kit for the Fuel pump this afternoon. It seems that this "Rebuilt" motor has a later model fuel pump than what shows in the manual a square one instead of the figure 8. If we can get the boat to 5000+ Rpm we will have a game! It does get up on a plane...
  15. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    OK Set the timing and hooked up everything and put the boat in the water. Ran the boat at the dock and checked the timing. I had set the motor off timing to 32* at WOT and could not quite get the idle right and also get the WOT. We ran the boat close to the launching ramp and dock (Upwind and...
  16. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    Good News! Plugging the big hole in the bottom of the water jacket has fixed my problem! I also made a closure of PC-7 epoxy putty on the left (forward) side of the bottom of the exhaust chamber. Where I filled all three cylinders in minutes before with 1 1/2 PSI on the flush adapter I ran 7 psi...
  17. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    OK, I stuffed some backer rods under the plate through the gap so that maybe the JB Weld would stay in the hole and not fill the whole bottom. I think that this hole is an artifact of other applications. Some of the earlier engines had a stuffing (what ever that is) and the later ones did not. I...
  18. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    The water IS definitely getting into the cylinders from the exhaust, but the water is getting into the exhaust from the hole in the bottom of the left side of the water Jacket down through that hole and the unsealed almost 1/4" gap under the aide wall of the exhaust manifold. I think that this...
  19. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    Unon closer examination and thought I believe that that hole is not supposed to be there on the Sport Jet installation and this is a Force L drive block forced into service. The gasket could never have sealed since there is over an 1/8 " gap under the sides of the exhaust chamber. The hole is...
  20. RedBarron55

    Sport Jet leaking exhaust manifold, The saga continues...

    The rain stopped and it warmed up and I tried my regulated flush setup. It worked well, but with only 2 psi of water on the engine it still filled every cylinder! Sadly I pulled the exhaust manifold and the cylinder head to check it and also clean the cylinders etc. Where the heck is the water...
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