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  1. midsized johnson

    Rectifier/Regulator Bench Test For 1996 Johnson 150 J150SLEDB

    What is the best method for bench testing the rectifier/regulator on this motor? I saw on CDI to attach leads from ohmmeter to the yellow and red leads of the rectifier, then switch the ohmmeter leads and see if you get the same, or different, reading. Should there be continuity one way and a...
  2. midsized johnson

    '96 Johnson 150 VRO Type Fuel Pump Repair

    I just replaced the "spoke" diaphragm in my son's VRO fuel pump (not using VRO). Is this fuel delivery, or for oil from the tank? It had fuel in it when I took it apart, but not sure how that pump works. Doesn't seem like two diaphragms would be necessary. Motor was falling on its face and not...
  3. midsized johnson

    Upper end sputter 96 Johnson 150

    My son recently bought the subject motor. I went through carbs, cleaned them and replaced bowl gaskets and spaghetti gaskets. Milled the backside of the carbs as they were slightly warped. Stator, optical sensor, power pack and plug wires are new from CDI. I have not messed with the fuel pump or...
  4. midsized johnson

    Identifying Actual Model Number of 1996 Johnson 150 Oceanrunner

    My son recently bought the subject motor. Trying to ID the actual model number, but the placard on the mid section is worn out. The ID number on the title is G04034872. Is there any way to determine model number from the ID number? Does it make a difference when ordering parts, not having the...
  5. midsized johnson

    Pulling Flywheel on 96 150 Johnson Oceanrunner

    The service manual says I need to put a piston stop in place when I pull the flywheel. Is this absolutely necessary? A mechanic friend of mine says he thinks it might put too much pressure on rods and bearings for that piston.
  6. midsized johnson

    1998 Johnson 115 Powerhead Base Corrosion

    Can anyone tell me what the powerhead base is supposed to look like? I've attached before and after shots of mine. There was significant corrosion at the fore section of the base on both the exhaust cover (midsection) and the powerhead base. I added JB weld to fill the area after sandblasting it...
  7. midsized johnson

    1998 115 hp Johnson powerhead removal

    Developed an exhaust leak at the gasket between midsection and powerhead. Is the powerhead removal as straight forward as it looks, or are there things I need to look out for? Plan on using heat at the base of the powerhead to help with bolt removal. This is a saltwater motor, so my main concern...
  8. midsized johnson

    98 Johnson 115 Timing Base

    Typical backyarder issue. Fixed one problem only to create another one. Had to take the flywheel cover and shifter/timing base components off to fix a bushing on the starter bendix. When reinstalling, something changed. The timing advance works, but doesn't slide back to low idle, kind of stuck...
  9. midsized johnson

    1998 Johnson 115 J115ELECM Starting Issues

    My 115 won't crank enough to get spark. Ran it this past Saturday and it ran well, although it was a bit hard to start for the run home. What it does is this. At first, when I turn the key, it will crank normally, then it bogs down like the battery is out of juice. Battery checked out fine. I...
  10. midsized johnson

    Part number for Tilt unit dust seal needed

    I've got a 1990 85hp CVETLD. The schematic doesn't show a dust seal for the main tilt rod. I went to the local Yamaha dealer and they couldn't find anything for it. Anyone have insight into this? A compatible part#? Thanks in advance.
  11. midsized johnson

    90 HP Tilt Trim Unit Compatability 1990 vs 2002

    Probably a dumb question, but is this even a possibility? I found one off the 2002 and wonder how different it is from the one on my 1990 model. Thanks in advance.
  12. midsized johnson

    Tach or Rectifier Issue on 98 115 hp Johnson (J115ELECM)

    My outboard's tach started acting up a few weeks back. Didn't think much of it, just though the tach was going bad. Fast forward to this past Sunday and the engine has no spark due to low battery. I got it to run hooking it up to my trolling motor battery and everything was working fine...
  13. midsized johnson

    Tilt Trim Unit Compatibility In Different Year Model 90 HP Yamahas

    I've got a 1990 85 HP model CVETLD. The tilt trim unit's been an issue since I've had the motor. I found one that goes on an '85 90HP (90ETLK). They are certainly different, but because I found it online, I can't measure it to tell if it would work or not on my motor. I realize it's a longshot...
  14. midsized johnson

    Intermittent overheat 98 Johnson 115 (J115ELECM)

    My outoboard has been overheating only at higher end RPM's but cools off at idle. As long as I don't run wide open, it doesn't overheat. That said, I'm not getting full my full top-end RPM's unless I trim the motor out to the point that it wants to porpoise. I'm thinking the problems are...
  15. midsized johnson

    UPDATE: Changing Optic Sensor on J115ELECM

    I bought an entire CDI powerpack kit that includes an optic sensor. I pulled the bolt on top of the timing wheel and saw that the metal on the timing wheel and keyway is really rusted. It appears that removing the timing wheel will pretty much destroy it. I dont' really have a problem with that...
  16. midsized johnson

    Yamaha Outboards: 4 stroke 70hp vs. 2 stroke 90 hp

    My boat is perfectly suited for the 90 two stroke. It's a 15 foot scooter with a tunnel bottom made to run skinny. Mine is powered with a 115 Johnson which is considerably overpowered, but holds okay. I'm looking to go lighter weight for a shallower drifting and hole shot. A boat builder friend...
  17. midsized johnson

    Johnson 1998 ELECM won't shut off with key or kill switch

    The other day, pulled up to a spot to fish and the motor wouldn't shut off when I turned the key off. Tried pulling the kill switch and that didn't kill it either. I let it idle for a bit and it eventually died, did that twice. It died after I gunned it getting it on the trailer, so no issue at...
  18. midsized johnson

    Tilt trim leaking at the line into the ram

    I have an 85 hp, 90 model Yamaha. The steel line going into the ram near the top of the housing leaks at the nut. I replaced the old line because it was bent so bad there was no way it would line up with the inside flare on the unit. Anyway, it appears that the flare may be damaged as no amount...
  19. midsized johnson

    1990 85 HP Yamaha CV85ETLD Tilt/Trim Troubleshooting

    Just picked up the subject motor last week. The guy told me the tilt/trim wasn't working. The engine runs, so next step is solving this issue. Is there any troubleshooting tips for this? Have not looked at it yet, but the plan is to put power to the motor and see if it works. The guy has...
  20. midsized johnson

    1986 70 HP Johnson Intake Leak

    My 70 has developed a strange issue. It idles and will run fine to near WOT, then bogs when the throttle is pushed all the way. We ran the boat with the cowling off and my buddy throttled it up by hand and it bogged, so it clearly is something happening in the fuel/air mix and not electrical. We...
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