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  1. pvanv

    6hp 4 stroke tohatsu (mercury) won’t reach WOT under load

    I have checked valve lash on many of these; none needed adjustment. It does sound over propped.
  2. pvanv

    How to manually check codes NSD90B TLDI

    Check fuel and air pressures, as I mentioned on that other forum.
  3. pvanv

    Tohatsu 115hp lower unit 2002-3

    I would go to Tohatsu. What's wrong with the old LU? Maybe it can be repaired. You need the actual model... not year.
  4. pvanv

    Tohatsu MFS 25 won't choke

    Full info is of course in the Factory service manual. Where is the plug?
  5. pvanv

    6hp tohatsu won’t turn on

    Oil light is powered by ignition when oil pressure is below 4 psi or so. I would expect it to flicker when starting.
  6. pvanv

    2012 Tohatsu MFS20C - Losing Oil

    If the fuel pump fails, it typically sends fuel into the crankcase. Not the other way around.
  7. pvanv

    2012 Tohatsu MFS20C - Losing Oil

    Are you over full of oil at all?
  8. pvanv

    General help regarding a 2006 Tohatsu M25C3

    Yep. Normal.
  9. pvanv

    General help regarding a 2006 Tohatsu M25C3

    Yes to upgrade a 25 to a 30 you reset the WOT to full and advance timing. 346873217M LOWER UNIT GASKET SET $24.73
  10. pvanv

    Nissan/Tohatsu reverse gear rod adjustment?

    Yes, you drive out the 3mm pin with a punch.
  11. pvanv

    NS55B

    Very few if any parts available.
  12. pvanv

    Nissan/Tohatsu reverse gear rod adjustment?

    Upper linkage may be bent.
  13. pvanv

    Bulb

    Probably a leaky o-ring on the fuel hose. I am sure it cranks... just doesn't start.
  14. pvanv

    Nissan NSF25A running at 2400 rpm @WOT

    No idea of speed ratio meaning. avail props 8,9,10,11,12,13 Figure maybe 300 rpm per inch of pitch. Diameter is insignificant.
  15. pvanv

    Nissan 50hp issues

    Check for corroded-through exhaust cover.
  16. pvanv

    Nissan 50hp issues

    Water in all 3 cylinders? Could be getting into the block. NSD... as in TLDI? or do you mean NS50D2 carbureted?
  17. pvanv

    Bulb

    I take it this an MFS9.9E. That's EFI. Of course, the fuel line is under suction when running. So the bulb might get soft. Not an issue, and the motor should continue to run OK
  18. pvanv

    Nissan 50hp issues

    What is your actual model?
  19. pvanv

    How to manually check codes NSD90B TLDI

    The TPS is fixed. You set the TPS initial setting in the ECU.
  20. pvanv

    How to manually check codes NSD90B TLDI

    As I mentioned on that other forum, I would expect at least 14v when running. There is a procedure, spelled out in the Factory service manual to set the TPS initial value. If that's wrong, all bets are off. You MUST reset the TPS initial value after replacing it. The FSM for the C model is good...
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