Search results

  1. 7

    50HP Replaced impeller and thermostat. No water flowing. Where to look?

    Old thread but I think his problem was that we didn't have the lower unit aligned with the water pipe. He made sure all lined up and it works.
  2. 7

    50HP Replaced impeller and thermostat. No water flowing. Where to look?

    Not sure if maybe there's a clog somewhere.
  3. 7

    carb adj 1997 50 hp

    Heres the manual for a 125hp but it will likely be the same for a 50 but one carb instead of two. The manual says warm up engine and put it in neutral. Adjust the screw out (richer) until engine starts to 4 stroke (sputter). Dial it the opposite direction until it starts to run so lean it...
  4. 7

    Motor dies then won't start

    One other thing that I'd consider common with age when the primer never becomes firm with pumping is that the fuel pump diaphragm tears and no longer pumps. When this happens, fuel goes right through the diaphragm and into the crank case through the impulse hose (the small fuel line hose that...
  5. 7

    1988 85 hp Force outboard

    I have unscrewed that myself on my first Force almost a decade ago... I knew when the screw came out and I saw the rounded end, I had done something wrong. I put it back in before the works dropped down and all was ok. But... it taught me a lesson. At the end of the day it will just mean more...
  6. 7

    How to set the shift and throttle cables and mechanisms?

    I found a page in my manual about matching the shift rod to the shift mechanism in the motor caul that says find FWD mark the position, find REV mark the position, then set Neutral on the shift rod as right in the middle. I'm finding play in the mechanisms means I have to go from Forward to...
  7. 7

    How to set the shift and throttle cables and mechanisms?

    I noticed today that WOT on the tower linkage (50HP) is not fully opening the throttle butterfly. So I lengthened what I assume is the throttle rod here. That seems to fix it and now the butterfly is flat and parallel to the choke butterfly. But I'm also noticing that the shift linkage is a...
  8. 7

    Motor dies then won't start

    When in doubt, I replace the bulb and any fuel lines in question. Bulbs have check valves which can fail. The rubber becomes stiff with time (and gas drying out the rubber). I consider a primer bulb a 3-10 year item depending on if gas has ethanol in it or not. The other issue can be fuel pump...
  9. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    I was really watching it and checked both cylinders. I didn't want to have a case where the engine linkage was advancing timing AND the CDIs were also advancing and end up with say 50 deg BTDC. So I was glad to see 26. That's probably costing me a few MPH speed. I should check it at 30 deg BTDC...
  10. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    Update: I took the boat out on the lake today and ran a near full tank of gas through it. I checked dynamic timing on both cylinders. They're both running 26 degrees before TDC on top and bottom cylinder (I made a mark equidistant to the #1 cylinder's 0 and 30 degree tick for the #2 cylinder and...
  11. 7

    Warning on stator and key switch wires. Ouch!

    This was a dumb move on my part but I had the key switch out for replacement and had to hold it still with one hand in order to crank after I had it rewired and was wanting to check it before tucking it back into the dash. I put my left hand around the switch body to hold it still and turned the...
  12. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    I didn't realize there was a conversion harness. I just saw $200 a pop used for Force CDIs and figured I'd try another route. These are $26 for a pair of CDIs, 5 pin plug wiring harnesses, and coils. The coils bullet connector into the CDI harness. I put a light on it at idle (which I realize...
  13. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    I just found a document from Vishay on finding the correct size (power rating) for a pulsed load carrying resistor. https://www.vishay.com/docs/48516/_ms9702509-2003-vishaychecklistpulseload.pdf This document says the relationship between continuous and pulsed is that quite a lot more power can...
  14. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    I should also post the original wiring for this engine for reference and to allow for color code correlation to the Force OEM ignition parts. My engine is the Pre-D model in the top half of the diagram. My two original CDI/Coil units are these ones.
  15. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    That is a concern and I'm going only off of what I'd read from the Honda side of things (reported stator voltages). At this point, this only a science experiment until I have some hours of use. It seems it may be workable for my situation since I never go far from the boat launch and can usually...
  16. 7

    Force 50HP running with cheap Honda 5 Pin AC CDI.

    I accidentally shorted 12V to the trigger input on my top CDI. I considered replacing it but at $200 each, I thought... hmmm... as far as I know, it's just a basic AC CDI and coil. Timing advance is mechanical on these engines (not CDI electronic advance). I bet a Honda 5 pin (made for 50cc...
  17. 7

    Prestolite Timing. Center Mark = 30 degrees? 50HP

    Sure. I don't have a (good) picture of the marks on this side of the flywheel on my pc unfortunately. But I drew in what I'm referring to in time on the first picture and. And I have a picture of the flywheel in a random position but I think I can almost make out the center mark and two...
  18. 7

    0.25 Volts AC from stator. But ohms out ok. What to check?

    Sure... Good idea. In my case, it's not going to really be a good example for someone else to follow since it was epoxy past the expiration date. I think it's about 10 years old. It was a good epoxy brand (West Systems 1 gallon kit with pumps), but the epoxy had gone bad with time. I watched...
  19. 7

    Prestolite Timing. Center Mark = 30 degrees? 50HP

    I just checked timing with a light by jumping the shift interlock, moving the shift lever to full throttle (while cranking the engine), grounding the top plug and disabling the bottom CDI (disconnected). First question, does the center mark on the flywheel = 30 BTDC? I put a timing light on it...
  20. 7

    0.25 Volts AC from stator. But ohms out ok. What to check?

    Thread solved. Now have over 300 volts AC measured with a regular meter coming from the stator. The problem was that the magnet ring came unglued from inside my Prestolite flywheel. Epoxied it back in. Already noted in my other thread but may as well note it here for future reference. Also for...
Top