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  1. 9

    Suzuki DT 140 2 stroke carburetor version tilt and trim stuck in down position

    if moving the motor around affects this, you have a bad connection or wire itself
  2. 9

    2001 DF70 won't go over 3000rpm

    thanks for the update , I do not think anyone could have guessed that was the problem I am sure you will double check things to make sure from now on. and others looking to solve similar problems will need to double check things they did also if they read this post
  3. 9

    Suzuki DT 140 2 stroke carburetor version tilt and trim stuck in down position

    if you have 12V+ heading to the T&T relay when you operate the switches either the relay is bad or you have a bad connection on the Pos or neg somewhere to the relay. have you tried jumping the relay to see if the relay or motor will operate?
  4. 9

    Suzuki Dt16 Starter

    if it fell out how would it work just sometimes?
  5. 9

    Boat going in reverse but not forward.

    since the OP did not give the motors model number we have no ideaa what it is. but Yamaha switched to a twist to shift in 1995 ,I would have to guess his 80s 40 is a push and pull shift rod. drop the lower unit again and place the lower unit in reverse and the shifter in reverse and hook back...
  6. 9

    1996 15 HP mercury with spark on only one plug

    what are you calling the ignition you want a pic of and what does it have to do with the operation of the trigger? I did finally find this on the CDI electronics trouble shooting web site for mercury's, but not for the 1996 15 hp section. The center hub on the flywheel also contains magnets...
  7. 9

    1996 15 HP mercury with spark on only one plug

    I do not have a pic of the flywheel, but if you read my posts above you will see it is the center ring of the flywheel that the trigger rides next to. the outer ring of the flywheel has 2 magnets and the stator LS and HS charge coils and the lighting coils are what those magnets run by
  8. 9

    1996 15 HP mercury with spark on only one plug

    why would it be sparking on one plug and not the other. there are no magnets passing by the trigger that I can see or detect. I would think it would need 2 magnets 180 deg apart positioned in opposite N S poles to give it the Positive and neg pulses. my question has been and still is , how...
  9. 9

    1996 15 HP mercury with spark on only one plug

    He said he checked the numbers on the original switch box, to order the ones he did troubleshooting info says it should have Pos and Neg pulses out of the trigger that fire different SCRs in the CDI. I am not seeing any neg pulses going to the CDI. swapping the trigger leads into the CDI...
  10. 9

    1996 15 HP mercury with spark on only one plug

    I am down to either the flywheel that gives the trigger the magnetic pulses is bad or the new trigger is bad. this is why I asked how this trigger is supposed to do what it does. and no one can explain how it functions/works, so it is a head scratcher.
  11. 9

    1996 15 HP mercury with spark on only one plug

    the manual advance moves the trigger coil around to change the timing
  12. 9

    1996 15 HP mercury with spark on only one plug

    done all that testing, but there is nothing written about how to test the pos and neg pulses from the trigger or more importantly how they are made. we did hook up a Simpson 260 to the trigger wires and rotated the flywheel with a drill motor, all I see are pulses in one direction this is...
  13. 9

    1996 15 HP mercury with spark on only one plug

    thanks but that does not help me understand how the one trigger coil is suppose to send out two different pulses (one Neg and one Pos) to the switch box telling when to fire the 2 spark plugs 180 degrees apart on the rotation of the flywheel. as I said the only way we can get the other plug to...
  14. 9

    1996 15 HP mercury with spark on only one plug

    Trying to help a friend with his motor that he reversed the battery leads on. he replaced the rectifier, trigger, LS and HS stater coils, and switch box, but only has spark on one plug. if you switch the trigger leads to the switch box the spark moves to the other plug. after reading what I...
  15. 9

    30hp 1989 yamaha firing problems?

    over heating or low on oil (if it is an oil injected motor) will put the motor into RPM reduction mode to let you know the motor has a problem just in case your buzzer/horn and gauges are not working properly
  16. 9

    Yamaha 90 no fire on cylinder 1

    make sure all alarms and gauges work as they should to make sure . But nothing that I know of will just kill #1 cylinder spark except the CDI not getting the signal to fire it . could be a bad wire/connection, bad pulser coil maybe. are you positive #1 has no spark at any time? do a search...
  17. 9

    Yamaha 90 no fire on cylinder 1

    I believe that motor has pulser coils that feed the CDI to tell #1 & #3 when to fire those cylinders. need to test those inputs to the CDI
  18. 9

    Increase power 1993 150 proV

    to get more hp you need to get more fuel and air into it at the proper ratio, and you also have to let that extra exhaust back out, so would probably need to modify the exhaust system also
  19. 9

    On-water toolkit for 50hp Yamaha?

    1st you need to think about what you will try to do if stranded, prop change out is simple as long as you can remove the prop. something to keep the prop shaft from turning while you loosen the prop nut would be good. spare prop, spark plugs, maybe fuel pump, and fuel filter. and tools to change...
  20. 9

    Suzuki 20hp … add a bit of power

    Most regular boats that have power tilt and trim will act like what you are saying if the motor is trimmed up too far under way at higher speeds/RPM. trim back down a little and all is good again.
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