Originally Posted by Woodyv12
We have lost gear
selection due to an internal pin that locates the forward and reverse lever on the selection shaft dropping out.
Anyone else experienced this?
Why would the pin just fall out? - we've never had drive open
Where is pin likely to be ... if we just replace it the old one presumably has the ability to jam in the gears
shows clear hole where pin should be.. lever just rotates.
Looks like developing into a big job for such a tiny part....
How we fixed
The internal gear selection lever pin is the one I broke and is accessible relatively easily on the top part of the drive. Once I had detached the cable the lever could be moved in a circle without any perceived change in the selection of forward or reverse. I just undid the four bolts holding holding the lever to get access. The part comes off easily but the oil
level is above the bottom of the opening so you will need a few rags to absorb the overflow.
I was lucky to be able to find both halves of the broken pin. I took the plate off the top of the drive - another 4 bolts - and a bit difficult to pull off as it locates a bearing recessed into its bottom side. I tried gently to no avail and eventually had a rush of blood to the head
attacked it with a chisel and hammer - without any damage fortunately. There is not much space around the gear cogs so I used a magnet on a springiny thing I bought from the auto store to retrieve the broken pin halves...lucky!!
You could try to find the bits thru the lever hole before removing the top plate but I didn't have any success.
The Part to order from Yanmar
is 22301-040250. Yanmar
actually sent it to me for free - it's worth about $2.00. They said the had never heard of this happening before. The pin is tapered and needs to go in the correct way.