Yamaha 4AC shifting does not work

[bennystromberg]

Hello,

I have a Yamaha 4AC (donīt know the year of manufacture, maybe around 1990). This morning when I started the motor and shifted in forward nothing happened. Not even reverse worked.
Where should I start searching to resolve this? In the lower unit or close to the shift lever?

Best regards,
Benny

[rodbolt17]

I cant help much, I don't think I have ever seen a 4hp Yamaha.
I would start by observing the shift linkage while moving the shifter.

[bennystromberg]

Thanks, I will check that. Start from the shifter and work my way down.

[rodbolt17]

we don't see many tiny mites.
most of what I work on is 150hp and up with twins or triples.