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  1. R

    1990 90hp stubborn overheat problem

    Here's what I have tried: Replaced entire water pump kit w/ new impellor Replaced thermostats and poppit valves Removed cylinder heads and replaced water diverters Forced high pressure water through copper tube Cleared small hole in thermostat housing Notched the poppit valves It will run at...
  2. R

    1990 Johnson 90 hp lost o-ring for drive shaft in engine

    I replaced my impeller. I slid the lower unit in most of the way, but felt a slight bind. I pulled it back down and the o-ring at the top of the driveshaft is gone. I tried lowering the engine but nothing fell out. I can't get a light bright enough to see that far up in that opening. I need help...
  3. R

    1990 Evinrude STILL overheating.

    I have replaced the water diverters. Cleaned the passages around the heads. Installed a new water pump and impellor. The thermostats we're replaced last year. The motor will run for hours at rpms under 4200. At WOT after 4 or 5 minutes the horn goes off.
  4. R

    Impeller stuck on shaft

    1990 Johnson 90 hp. Pulled the cover off the water pump. When I pulled the impellor cup the impellor stayed on the drive shaft and I can't seem to budge it. I sprayed a little pb blaster and tried a small amount of heat (didn't want to melt the rubber. Any suggestions welcome. Thanks.
  5. R

    1990 Evinrude 90 hp tilt won't go down

    My tilt-n-trim works fine going up but does not want to go down. As long as it doesn't go very far up it will come down. But if I go more than about 45 degrees, the motor sounds like it is trying to lower it but no movement. If I use the manual release it will come down. I have tried greasing...
  6. R

    Re tighten head bolts?

    Ok, I got my water deflectors installed and everything closed up. How long should I run motor before I retighten the head bolts?
  7. R

    1990 rude 90 hp TNT making crunchy sound

    Trim portion seems to work fine both directions. But when it gets to the tilt part of travel going up it sometimes almost sounds crunchy. It went up, but didn't want to come back down. Pressing on the motor while running the down switch got it moving.
  8. R

    1990 rude 90 hp heads stuck

    I have all 10 bolts out, but I can't budge the head. Tapped it with a maul, but wasn't sure how much force I could/should use.
  9. R

    Expanding fuel tanks

    I realized that I asked a question on an old thread, so I am reposting here. The new fuel tanks with one way vents swell up when it gets hot (and its really hot down here in Texas a lot). Does that put excess pressure on the fuel diaphragm?
  10. R

    1990 90 hp johnson v4 impact wrench on head bolts?

    My 90 hp overheated at WOT (5500) when I trimmed up. water was still coming out tell-tale. I turned the motor off as soon as alarm sounded, waited about an hour then restarted. I was a long way from the dock, so I had to run it again. I stayed below 4500 rpms on the way back and the alarm...
  11. R

    Johnson 1990 90 hp bolts

    Are there any tricks to removing the head covers? I am worried about broken bolts. Is sudden sharp jolts better than slow steady pressure? What about an impact driver? Heat? I think I need to change the water deflectors. There seems to be an internittent overheat. Twice recently it seemed to...
  12. R

    Mixing gear oil

    Can you mix different gear oils like OMC and Quicksilver? Also, approximately how much gear oil should a 1990 Johnson 90 hp hold?
  13. R

    Tilt trim not lowering but trim motor running

    1990 90 HP Johnson. Works fine going up, but doesn't move downward even though I hear the trim motor running, and I can then go back and push on the engine and it will go down the amount I have run the down button for. In other words if I hold the down button for a long time the engine will...
  14. R

    1990 90 hp Johnson starter hesitating

    It seems to only be the first time of the day. It gives it like a "bump, pause, go. Starts it up fine. Battery is new and was checked at Auto parts store. Could this be solenoid? Or is more likely that the starter is going bad?
  15. R

    Thanks for all the help!

    I wanted to say thank you to all of the contributors on this site. You have helped me so much with my 1990 90 hp Johnson. I started thinking about it, and I made a list of items you have helped me with: 1 carb bowls warped 2 faulty power pack 3 replace water pump 4 replace thermostats (without...
  16. R

    1990 Johnson 90 how tnt motor rebuild

    My motor on my tilt and trim unit quit working. I have the unit off the motor. Is this a motor that can be rebuilt by an amateur? Or should I bite the bullet and buy a new one? I haven't taken it apart yet because one of the screws broke off at the head, so I will have to drill it out.
  17. R

    While I have the lower unit off

    Is there a way to test the water flow through the engine passages? Sorry 1990 90 hp Johnson
  18. R

    Stuck shift lever 90 how Johnson 1990

    I have the service manual, and I have removed the cotter pin but I can't push the shift lever over any a all. Is there a trick to it? I can't see it very well because of it's location.
  19. R

    What's with all the trash posts?

    How are all these football and ******** posts taking over our forums? Aren't there moderators?
  20. R

    Adding a Kill Switch 1990 Johnson 90 hp

    All right, My motor is running great now. But the control box that came with it does not have a kill switch. So I am adding one to my dash board. I ordered a generic kill switch. My question is how to attach to motor. I think that I can run a wire from where the black and yellow wire attaches to...
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