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  1. 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...
  2. 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...
  3. 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...
  4. 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:
  5. 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...
  6. 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.
  7. 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.
  8. pvanv

    Tohatsu M50D 50hp tilt trim pump

    Manual tilt:
  9. pvanv

    Tohatsu M50D 50hp tilt trim pump

    Newer TT unit:
  10. pvanv

    Tohatsu M50D 50hp tilt trim pump

    Early TT unit:
  11. 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...
  12. 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
  13. pvanv

    Low Compression on 4hp. What am I missing?

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

    Torque for 4 B cylinder head (Please)

    Tighten as you would a 5-lug wheel; skip across one bolt as you go, in a "star" pattern. Torque up in at least 2 sets (half torque first, etc.). Here is the torque chart:
  15. pvanv

    tohatsu 30 hp efi 4 stroke

    There is an aluminum casting bowl that houses the electric fuel feed pump. It has a small brass drain screw. That should be drained any time the boat will be laid up for a month or so. That is the vapor separator. Item 1 in the diagram. There is also the high pressure fuel filter, item 34 in the...
  16. pvanv

    2001 nissan 15 hp 4 stroke

    Year is unimportant; Model/serial is everything. You probably have an NSF15B or B2. Best to buy a Factory service manual from your dealer (not an aftermarket manual). Here is the page from the parts catalog that shows how the carb goes together. Yes, the emulsion tube nozzle just slides in/out...
  17. pvanv

    Tiller handle

    Yes.
  18. pvanv

    tohatsu mfs6c gear case and oil issues

    Forget the aftermarket manuals; get a Factory service manual: Covers 4hp, 5hp & 6hp "B" and "C" 4-stroke models Part #: 003-21034-2 List Price (MSRP): $41.67
  19. pvanv

    Tohatsu Sailpro 6 - this CAN'T be normal, right??

    Depending on the lube used, the grease may have softened the rubber bushings. It won't hurt anything. Those bushings help dampan the 1-cylinder vibrations so they don't shake the transom as much. You can get new bushings, but they probably aren't a lot stiffer. Also, if you want the motor locked...
  20. pvanv

    Tohatsu Sailpro 6 - this CAN'T be normal, right??

    The usual cause of that kind of issue is either over-lubrication with way too much grease, or grossly over-tightening of the friction band, or both. On sail applications, consumers sometimes try to use the friction band as a steering lock, and damage the mechanism. Tohatsu actually makes an...
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