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  Yamaha 90 1989 won't fully engage in reverse

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Author Topic:   Yamaha 90 1989 won't fully engage in reverse
17whaler posted 05-18-2003 07:12 PM ET (US)   Profile for 17whaler   Send Email to 17whaler  
When I go to put my yamaha in reverse it sounds like it's between neutral and revers, could this just be the reverse gear missing teeth, once in a while it catches or is there an adjustment for the linkage? I tried adjusting the throttle cables but no luck, foward is fine. Any help would be appreciated. I really don't want to drop the lower unit and take apart the gears if I don't have to. May be a job for a mechanic. Don't want to byte off more then I can chew.
88whaler17 posted 05-21-2003 12:52 PM ET (US)     Profile for 88whaler17  Send Email to 88whaler17     
Search on my name and you should see a similar post (early May, late April I think). My issue (88 Yamaha 90) was the shift shaft, which is a common problem in late 80's YAMAHA's. It isn't SS, so it eventually corrodes and will stop working. Very expensive fix (or can be) depending on overall shape of engine. You have to remove lower unit and Powerhead if it is this problem. Bolts may be corroded, etc and it will get very labor intensive (read $1000 + ). At the end of the day, I was going to dump 1200 into a $500 motor. This was my chance to repower to a new Yamaha 4-stroke and I love it - $6750 + later. I bought the boat/motor used, so I couldn't vouch for the condition of the motor so your situation may be better. Good luck. Seems like the sure items, like taxes, on this model is the shift shaft and tilt tube sticking at some point in the history. Testament to routine maintenance.

Good luck.

Bigshot posted 05-21-2003 03:22 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
My money is on the shift shaft. Not a big deal if powerhead bolts come off easily. I did it to my 1984 which got stuck in reverse and it took me a day and about $70 I think for the rod. Removing the powerhead on a 90 is easy being all self contained. To check drop the lower unit(easy as Dell) and look about 3 inches up and see if it is all rotted which I bet it is.
88whaler17 posted 05-22-2003 09:58 AM ET (US)     Profile for 88whaler17  Send Email to 88whaler17     
My powerbolts were shot. I was gunning for the simple fix and was doing it myself until I hit the bolts. I had serious corrosion problems from neglect from previous owner on other aspects of motor as well. Good luck
17whaler posted 05-31-2003 07:39 AM ET (US)     Profile for 17whaler  Send Email to 17whaler     
Thanks for the help, I'll let you know what it turns out to be, had to keep the boat in over memorial day weekend and run it w/out revers, just makes docking a little tricky at times depending on other boaters and the wind.

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