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  1. pvanv

    tach question for a 1998 nissan 25c3

    Re: tach question for a 1998 nissan 25c3 The sender goes in series in the white wire of the tach signal wire. There is also a yellow tach "ground" wire -- hence we refer to the tach wires as being yellow and white. (BTW, Your manual does not take into account the new-style tach, which came out...
  2. pvanv

    Lower unit stuck on 18hp nissan

    Re: Lower unit stuck on 18hp nissan You may have a stuck driveshaft. Either the splines were not greased the last time the LU was down, or maybe it has never been down, or the driveshaft could be twisted, if the motor hit an obstruction. The technique to free the LU when the driveshaft is...
  3. pvanv

    NS5B Gasket kit sourcing.

    Re: NS5B Gasket kit sourcing. The rubber plug covers the slow jet. That forces the slow jet to get its supply via the main jet. see the diagram:
  4. pvanv

    Water pump issues

    Re: Water pump issues Luis does have an OK "shade tree mechanic" way of determining whether you have any pumping at all. But, in all fairness, Elvin is (as usual) correct. The wp kit likely needs to be replaced. 361873220M WATER PUMP REPAIR KIT 25B-40C $46.67 If you are going to turn your own...
  5. pvanv

    25hp Nissan Lower Unit Leak?

    Re: 25hp Nissan Lower Unit Leak? What manual do you have? You should use your Factory service manual (003-21035-1 SERVICE MANUAL, 1 & 2 CYL, 2-STROKE, $45.00) as a guide to replace the LU seal kit: 346873217M LOWER UNIT GASKET SET, $30.42. The faulty seal is probably the prop shaft seal (#26...
  6. pvanv

    NISSAN NSF9.8A3 Carburetor Linkage

    Re: NISSAN NSF9.8A3 Carburetor Linkage It's your choke linkage that's decimated. Plus the throttle looks to be out of adjustment. Some monkey has drilled-out the idle mix screw access plug. Those missing parts aren't sold separately, but we may have a used carb in the shop that will have...
  7. pvanv

    Can a 2013-2014 3.5 be converted to a fuel pump tank setup?

    Re: Can a 2013-2014 3.5 be converted to a fuel pump tank setup? There was once a vacuum-operated fuel pump option for the M3.5 2-stroke. I have installed them, and they work OK; they may still be available. Also, the newer 4-stroke MFS3.5B already has a fuel pump, because of the EPA-mandated...
  8. pvanv

    8hp Nissan Choke Sticks

    Re: 8hp Nissan Choke Sticks It's in the parts catalog.
  9. pvanv

    Nissan 55 (1988 Vintage)

    Re: Nissan 55 (1988 Vintage) I think I know the part you need. I can send you a diagraqm, and if you circle the part, I should be able to match it up, as long as it's still available. Drop me a PM with your email address or just email me directly: paul@obersheimersails.com
  10. pvanv

    Tohatsu 6 4 stroke, turning off at lower rpm

    Re: Tohatsu 6 4 stroke, turning off at lower rpm Yes, Do the carb first. In the future, be sure to always run the carb out at the end of each and every day. WATER PUMP KIT : 4HP ~ 6HP Description: Water pump repair kit. Includes all parts needed to service water pump. (cup, plate, impeller...
  11. pvanv

    Lower unit incompatibility?

    Re: Lower unit incompatibility? The block (reverse lock link) is to release the tilt lockout when in Forward.
  12. pvanv

    Problem on 1997 Nissan 3.5B HP motor with lower unit

    Re: Problem on 1997 Nissan 3.5B HP motor with lower unit Just re-seat the seal, or install a new one. It fits inside the lower pump case.
  13. pvanv

    older nissan, air silencer lock plate

    Re: older nissan, air silencer lock plate It should be flat. No, it does not interfere with the choke. You need it installed for proper airflow and mixture.
  14. pvanv

    Tohatsu 9.8 tiller install and cost??

    Re: Tohatsu 9.8 tiller install and cost?? You may also need to convert to on-baord shifter, as opposed to having everything at the RC box. Here is the parts diagram for the shifter:
  15. pvanv

    Tohatsu 9.8 tiller install and cost??

    Re: Tohatsu 9.8 tiller install and cost?? Here is the diagram of electrical parts. You may or may not need the stop switch and the main start switch.
  16. pvanv

    Tohatsu 9.8 tiller install and cost??

    Re: Tohatsu 9.8 tiller install and cost?? We need your correct model (year is irrelevant for servicing). Assuming you have an MFS9.8A3, the steering portion is shown in the parts diagram below. You will also probably want to convert the electrics for the starter, etc., back to on-the-motor...
  17. pvanv

    Impeller for 70A

    Tohatsu America now has the 353650210M (IMPELLER, NS45A2-70A2) in stock. Available from any Tohatsu/Nissan dealer (including me) for $42.50. This is the OEM impeller. These were NLA for a few years, but now you can keep your old 70A pumping.
  18. pvanv

    Is my 2002 Nissan 5 hp a ns5b or something else?

    Re: Is my 2002 Nissan 5 hp a ns5b or something else? If you are referring to the transom clamps, here is a page from the parts catalog for the 5B. If you have a 5 hp 2-stroke, there's a 99% chance that it's a 5B.
  19. pvanv

    Is Club Jeppesen worth the $$ ?

    I'm looking at joining Club Jeppesen. $89.00 a year for free chart updates. The question is whether it's actuall worth it... Since I use only the Lake Ontario bathymetric chart chip in my SH 390i plotter, I question how often it's updated (by anyone). It may well be a waste of money... or it may...
  20. pvanv

    thermostat location

    Re: thermostat location Why do you need a new thermostat? Is your motor overheating? Is the telltale flowing? The stat on the MFS25A is near the top of the block, on the port side. See items 2, 3, and 4 in the diagram.
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