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  1. Q

    1990 GT-150 timing

    HELP!!!! What is the WOT timing for a 1990 J150STLESB ? Seloc manual says 16 to 18. I find that hard to believe. Called local boat shop and they said the OMC manual does not give a timing setting because they set it with a"special" tool.There is no sticker on the airbox and nothing marked on...
  2. Q

    Difference in timer base

    Does anyone know if there is any difference in the Timer base for a 1979-88 GT150 crossflow and a a 1990 GT150 crossfire other than the dongle? If you changed the plug, would it work?
  3. Q

    GT-150 Timer base impedance

    1990 GT 150 crossfire. No spark, intermittent spark. Took timer base off and checked wires and physical condition, Looks OK. Checked impedance and got the following; Starboard White to Blue 1.5M Purple 1.7M Green...
  4. Q

    Splicing pack to coil wire.

    1990 GT150 crossfire. The clip that goes to the coil on the orange/blue wire from the power pack is broken. Can I splice a wire with clip and boot from my old pack onto this one?
  5. Q

    GT150 flooding on startup

    1990 Johnson GT150 crossfire. Seems to be flooding when trying to start it. I followed the cold start procedures posted. If I pull the plugs and spin it over, it will fire right up. Pulled the airbox cover off and the center and bottom carbs have a very small amount of fuel visible on the front...
  6. Q

    GT-150 electronics troubleshooting

    A little history. This is a 1990 Johnson GT150 crossfire Model # J150STLESB. Last year it developed a no spark on any cylinder. Tested with a 6 cylinder spark tester with the plugs out. Took it to the pros and they replaced the wiring harness, key switch and kill switch. After a couple of trips...
  7. Q

    GT-150 electronics troubleshooting

    1990 V6 crossfire. Intermittent no spark. Did all of the checks in the CDI troubleshooting section. Everything was in spec except brown to brown yellow wires. I get 235 volts connected but no voltage disconnected. Can't find this situation in the troubleshooting guide. Any ideas. Stator and pack...
  8. Q

    GT-150 Odd random spark returns

    Well, I thought I had this solved by replacing a kill switch but it's reared it's ugly head again. I have a 1990 GT-150 crossfire. At times I have no spark, confirmed with spark tester. When that happens, I can unplug the big red plug, jump the solenoid and I get good spark. Then without...
  9. Q

    GT-150 Odd random spark

    Here's a strange one. My 1990 GT-150 crossfire at times has no spark on the spark tester. I disconnect the red power connector and jump the starter. Good spark all cylinders. Reconnect the red cable and I still have spark. This happens randomly. When I get no spark I go through this whole...
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