1974 Evinrude 9.9 throttle shaft gears question

[tanuki]

I inherited and am cleaning up a 1974 Evinrude 9.9 that has been sitting for many years. I have noticed that the throttle shaft gear mesh is not engaging all the way. When I push on the throttle grip the shaft moves about 3/16 of an inch and engages much better. The shaft is spring loaded, so the shaft springs back when I release the throttle grip. It seems that the throttle will work, but the gears are not fully engaged and the teeth will wear because of this. I am a rookie at this and any info is much appreciated. Attached are some pix.
(the cast housing is broken off on one side so you can see the shaft gears).

 

[AlTn]

Re: 1974 Evinrude 9.9 throttle shaft gears question

if you haven't found it while searching the web....google..Leeroy's Ramblings.outboard motor related articles.9.9/15 hp maintenance and repair..a wealth of information and knowledge covering this series of engines

 

[raczekp1]

Re: 1974 Evinrude 9.9 throttle shaft gears question

its becouse a piece of aluminium from handle is missing./broken

dont turn or play with handle, you just destroy this mesh teeth

look for used handle for john/ewinrude 1974-1986 on ebay

 

[tanuki]

Re: 1974 Evinrude 9.9 throttle shaft gears question

Well thanks for the site. Seems that when this happens one uses homemade plastic shims to extend the engagement of the gears which is what I was thinking of doing anyway, but it confirms that nothing is broken. I have disassembled the throttle shaft, cleaned and lubed it and all the parts were included and not broken or missing. So onward with the shims!

 

[raczekp1]

Re: 1974 Evinrude 9.9 throttle shaft gears question

missing part

 

[tanuki]

Re: 1974 Evinrude 9.9 throttle shaft gears question

missing part
View attachment 134243

The "part" that you yellowed in is just part of the cast throttle housing that cracked off (it is only off on one side) and has nothing to do with the gears meshing.....

 

[raczekp1]

Re: 1974 Evinrude 9.9 throttle shaft gears question

this missing part helps to keep tilter joint in right position.is up to you if will fix this.