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  1. pvanv

    Correct Prop Hub?

    I have a pair of Merc 115's on a 50-foot pontoon boat. The serial number is: 2B151536, model is 115F631D. The props are "loose" when the prop nuts are tightened all the way down. I replaced one prop and hub due to damage, and that one is now fine. So I got another hub kit of the same kind (Flo...
  2. pvanv

    Tohatsu 3.5 drive shaft bushing

    We really should have your precise model, not just horsepower. It's always best to replace the complete wp kit, instead of just the impeller; pumps better, and lasts longer. There is a bushing used on some long models that reduces drive shaft whip. here is what the page from the parts catalog shows:
  3. pvanv

    carburator problem

    Odds are you are missing the spring (1-21 in the diagram) for the screw: 346032680M SPRING B $1.40
  4. pvanv

    2011 20 hp Tohatsu carb leaks

    There isn't any overflow pipe. If you left the plunger installed while in carb dip, it probably is shot now. Where exactly on the diagram is the leak?
  5. pvanv

    Nissan NS40C - Ball barring found in housing when pulling out of storage?

    It's item 20 in your parts catalog giagram. In the current catalog, it's item 11:
  6. pvanv

    How to detach 2006 9.9hp tohatsu cables from motor

    1. Throw that generic manual away. Get a Factory service manual. Tohatsu/Nissan motors are not referred to by year for servicing, but rather by actual model/serial. 2. The motor does not need to be removed to do "spring maintenance", unless the boat is in the water, and then only to change the...
  7. pvanv

    15 hp nissan

    The rectifier/regulator is NOT under the flywheel; it bolts to the intake manifold.
  8. pvanv

    Small oil lower port on NS40C lower unit

    The upper and lower plugs should be identical. They are metric, so if your pump is setup for the old OMC drains, you need an adapter. The fill/drain plugs are items 3 in the diagram. Item 36 is the cam rod bushing stopper, not a drain plug. You can d/l your owners manual from...
  9. pvanv

    Engin Basement Gasket leaking

    With a long shaft motor, the prop stays submerged. The motor is in its own compartment, so it is very quiet, especially since it's a 2-cylinder 4-stroke. No gasoline inside the cabin, either, so safer. No hole in the bottom of the boat to leak. This ends up being a fully Remote motor, with...
  10. pvanv

    2000 Yamaha 4 hp 4-stroke tiller handle is floppy

    I have a friend's dinghy motor, Yamaha model F4MSHY, which runs well, but the tiller is "loose". It's fastened to the 4-piece carry handle and lower cowl fine, but it seems there is a "steering bracket", apparently now obsolete, that is supposed to bolt to the bottom of the block, and keep the...
  11. pvanv

    Nissan 3.5 doesn't engaged forward

    That shaft has 2 o-rings, and should have been greased from the factory. There is also a ceramic ball detent with a spring that holds it in either N or F. You may want to lubricate it, but if so, don't lose the spring and ball, and expect to need new o-rings:
  12. pvanv

    Engine Temperature and Starting

    There is a low-pressure fuel system that feeds fuel to the separator, which has a float like a carburetor. Inside the separator is the high pressure fuel feed pump, which pressurizes the fuel rail. In addition, there is the low-pressure filter, the high pressure filter, and the fuel cooler, as...
  13. pvanv

    2002 Nissan 6hp long shaft bushing stop

    The bushing is pressed (a little) into a casting... the whole thing is called the bushing assembly. That is retained by the stainless stopper plate and that is all held in the housing with 2 stainless screws. No, I'm not at Obersheimer's any more.
  14. pvanv

    2001 50hp Tohatsu power tilt

    The lower TT cylinder pin is threaded on each end, and has a sleeve tube (called a collar in the parts catalog) over it between the clamp frames. Depending on the corrosion, you can remove one of the nuts, and with a proper drift pin, drive the shaft out.
  15. pvanv

    Tohatsu M50D 50hp tilt trim pump

    Manual tilt:
  16. pvanv

    Tohatsu M50D 50hp tilt trim pump

    Newer TT unit:
  17. pvanv

    Tohatsu M50D 50hp tilt trim pump

    Early TT unit:
  18. pvanv

    Starting Issue with 30 HP 2 stroke Nissan outboard

    The green wire is the solenoid trigger from the key switch. It should have 12v when the switch is turned to start position. If that is not the case, the problem is likely with the wiring between the motor and switch, or a bad switch. Standard boat power troubleshooting -- not specific to any...
  19. pvanv

    Shifting problem with a Tohatsu M8B 8hp Long Shaft

    Yes, you are right. A part is missing. Item 17. 3B2642220M SPRING HOLDER $2.25
  20. pvanv

    Low Compression on 4hp. What am I missing?

    In order to access the reedd on that model, you must separate the block:
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