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  1. 9

    Yamaha F150 Speedo Tube Disconnected?

    have you looked at your motor to see if that hose is even there? post #2 told you how
  2. 9

    Yamaha F150 Speedo Tube Disconnected?

    if you look at the parts diagram Boscoe posted for you, you will see where the nipple is located and where the hose is routed thru the hole in front of the upper casing
  3. 9

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    the 9.9 is just a 15 that was modified at the factory to meet requirements on HP restricted lakes/ponds. dynoing a motor is the same for any type of motor. not many have the equipment to do it, but it shows HP and torque output curves most people swear how they modified motors and increased...
  4. 9

    Yamaha 2.5hp 4-strk , impeller came apart - inside engine now ?

    compressed air is used all of the time ,I usually use it while the motor is running on muffs so the air can move debris around and hopefully out with the rest of the water flowing out, removing the stat also gives it another exit point at the top of the power head. not sure, but maybe you are...
  5. 9

    Yamaha 2.5hp 4-strk , impeller came apart - inside engine now ?

    why afraid of pulling lower unit? that has to be pulled to replace the pump anyway. dropping the lower and inspecting the pump again is a very good idea since you ran the motor with not enough water to get to the pump. those pumps do not like pumping just air, you may have damaged it already
  6. 9

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    only true way to find out would be to dyno the motor before and after the modification. with a 50% increase in HP would a different prop be needed also also it was mentioned the reed stops were different allowing the reeds to open more
  7. 9

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    just as I thought the 15hp reed cost a little bit more that the 9.9
  8. 9

    1996 suzuki dt 85 lower unit removel?

    and do not wait so long to drop the lower unit and change the water pump. gives a chance to clean everything and lube it up, even the drive shaft where it goes into the power head. those are even harder to get apart if they rust together
  9. 9

    1990 Yamaha 250 VX 76. Power drops off.

    care to explain what part of the stator was the problem? charge coils or maybe pulser coils?
  10. 9

    Little parts that arent around anymore.

    I am trying to think of where this little nylon washer to hold the linkages in place is used and what it looks like . maybe a pic would help me understand. I do have some hole punches and small gasket cutters in my tool box to make things also, they do come in handy
  11. 9

    Yamaha 200 static flush with boat in water

    I would just follow what Yamaha says. just because someone told you different on the web does not mean it has to be done his way
  12. 9

    1989 Yamaha 9.9SF 2 cycle stored for 12 years

    1st thing I would do would be to check compression. no reason to much else if it is not good. compression, spark , timing, and then fuel to air ratio is what is needed to run
  13. 9

    2017 F90 cranks but won’t start

    I guess you are talking about the lift pump that fills the VST. you also need to understand the pump in the VST is cooled and lubed by the fuel running thru it. without fuel in there to pump you could have hurt that motor also running it dry. I also think that water in the fuel itself from the...
  14. 9

    Yamaha 70B too much Autolube

    I thought all Yamaha's used linkage from the carbs to the oil pump and it was adjustable. threaded rod if it comes off the oil pump goes full on
  15. 9

    Yamaha 200 static flush with boat in water

    I would think someone could rig up something easier to get to. quick connects for garden hoses are readily available at hardware stores if nothing else set a Tee in and bring it out to an area easy to get to and then put a connector on and rig up a cap or plug to close it off when not flushing
  16. 9

    Engine stalls when put in gear

    trash in the air box means mice or something else got in there. no telling what all they could have done. make sure the manifold pressure reading at key on is the same as the local weather station report at that time. change in altitude will affect the fuel to air ratio and power. will...
  17. 9

    2017 F90 cranks but won’t start

    need to know if the rail pressure is in spec. injected motors will not run if there is not enough fuel going thru the injectors
  18. 9

    1999 Yamaha 9.9hp 2 stroke popping sound at WOT

    only popping noise I can think of would be a lean sneeze
  19. 9

    1986 YAMAHA 50HP 2STROKE NO REVERSE STARTS IN FWD!!

    I believe even those old motors were spring loaded into forward. So you have to force them into neutral and reverse. check to make sure you have both the motor and the controls on neutral when r the same gear when putting together
  20. 9

    VIDEO: Runs Perfect For A Minute Then Red Light Comes On, Motor Shutters & Stops.

    yep the red light tells you the motor has a problem and RPM is limited also to help you know to look at the light and shut down the motor as soon as it is safely possible
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