Motor question

[J White]

Marine Doc, or anyone else - how much fore/aft play should be
acceptable on the prop shaft, '06 Yamaha 90 four stroke?
Not making any noises or anything, it just moves in and out further
than I think it should - and I checked, the prop nut is tight, it is the
whole shaft moving. Thanks, Jeff

[BarryG]

http://www.themarinedoctor.com/cgi-b...;action=login2
Here is the marine doctors forum...you might get a quicker response!

[The Marine Doctor]

There should be minimal movement on the shaft. If the gearcase is too tight, you will get premature wear. So a little backlash is allowable.

If you believe there to be too much movement...pull the bottom drain screw and check for filings...this will be the first indication that there might be gear damage.

TMD

[Barnacle Bill]

There should be minimal movement on the shaft. If the gearcase is too tight, you will get premature wear. So a little backlash is allowable.

If you believe there to be too much movement...pull the bottom drain screw and check for filings...this will be the first indication that there might be gear damage.

TMD

Could he have the wrong thrust washer? I can't remember.

[J White]

Thanks for the replys guys. I will pull the plug and take a look-see
at the oil first chance I get.

[The Marine Doctor]

Wrong thrust washer should make only the prop move.

TMD

[Marshrat]

I had a 60hp yammy 2 stroke that the nut backed out causing slack. You may want to pull your prop and check the nut holding your gears in the case.


Warren