gear on lower shift shaft

RLT III

Petty Officer 2nd Class
Joined
Jan 27, 2010
Messages
180
i saw a pic somewhere in here but can't find it on the position of that gear i've got the lower unit in N but not sure what position to slide the gear on. I took the old lower unit off in N like my manual says to. but the new lower unit did not have this gear so need some help thanks
 

Moody Blue

Captain
Joined
May 24, 2004
Messages
3,136
Re: gear on lower shift shaft

Hmmm, what motor, year etc?

Can't picture any gear on the shift shaft :confused: There is a plastic cam that operates the reverse lock mechanism off the shift shaft, is that what you are referring to?
 

RLT III

Petty Officer 2nd Class
Joined
Jan 27, 2010
Messages
180
Re: gear on lower shift shaft

Yes, i guess it's looks more like aluminum . it has the high flat top and then it slopes down but it fits on the splines of the shift shaft. i just don't know where to put it back at so it will lock out the reverse as you say. please help
 

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,790
Re: gear on lower shift shaft

" Gear on lower shift shaft" confusing!

Most Mercs of memorable history use a cam/camfollower shift mechanism. Twisting the shift shaft rotates a cam with 3 detents, each of which is a different depth. This different depth causes the shift dog on the prop shaft to move into the F gear, sit in the center for N, or move to the rear for R.

To figure the gear, move the lever to one limit or the other...forget which way is which but it doesn't matter. With the shift shaft at one extreme, the prop will perform:

F is clicking in one direction and resistance in the other.
N is no resistance in either direction.
R is resistance in both directions once it locks in to the shift shuttle....slowly rotate the prop as you slowly rotate the shift shaft....forcing can damage the linkage.

Once you know what gear the lower unit is in, put your remote control in that gear and put her back together.

Want more ask.

Mark
 

RLT III

Petty Officer 2nd Class
Joined
Jan 27, 2010
Messages
180
Re: gear on lower shift shaft

K well i got the gears in order it's placing the reverse cam lock in the right position since it was not already on it when i got the lower unit. I have it in N and just snugged it up to check shifting and all is good(just the way you said it to be) still i take it apart putting in F then raising it up then putting it in N and unbolting it and it comes apart great and back as well but where do i place the cam lock? more studying i suppose Thanks for the help
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: gear on lower shift shaft

RLT III, do you have a service manual for your engine? All the questions you're asking are covered in the manual. (Your engine manual is 90-86135-5)

Chris........
 
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