Woodruff key - Yamaha 90280-04M05

[OlivNewCal]

Thanks for your thoughts guys! Matter is not the price of the key but its availability here. I was just wondering if someone knew this key's measures to try to find the same, out of Yamaha service where the part is on backorder. As far as I could measure it, it's not standard, and the part code doesn't give a good clue, it's not 4x5 (would be to easy!). 4 x 6.5 x 21 doesn't look standard (to me, perhaps someone with more experience with mechanics knows), my caliper is not digital and only metric, that's why I was asking if someone could tell me if the part measures are imperial.
Just a small part I can't remove without destroying it, jammed in the drive shaft, makes the simple water pump maintenance last, last, last...!

[OlivNewCal]

I am guessing so. Heavy emphasis on the guessing.

the size of this part, with same code, is not the same than the one I have... looks strange.

[panasonic]

4 x 6.5 x 21mm in imperial is:

4mm = 0.157" or close to 5/32" (.001" over)

6.5mm = 0.256" or close to 1/4" (.006" over)

21mm= 0.826" or close to 53/64" (.002" over)

It's a metric key.

[pstephens46]

Brilliant minds think alike. I was thinking the same. Learned something nonetheless.

You get any rain over your way? All around me. I got nada. Nothing. Zip. Squat. Dry as a bone here.

Just a slight pee. Hoping for more as I just put down a second fertilization for the year. Centipede grass is the worst.....

[pstephens46]

Thanks for your thoughts guys! Matter is not the price of the key but its availability here. I was just wondering if someone knew this key's measures to try to find the same, out of Yamaha service where the part is on backorder. As far as I could measure it, it's not standard, and the part code doesn't give a good clue, it's not 4x5 (would be to easy!). 4 x 6.5 x 21 doesn't look standard (to me, perhaps someone with more experience with mechanics knows), my caliper is not digital and only metric, that's why I was asking if someone could tell me if the part measures are imperial.
Just a small part I can't remove without destroying it, jammed in the drive shaft, makes the simple water pump maintenance last, last, last...!

You can certainly remove without destroying. And I used to think the same.....

[TownsendsFJR1300]

I've made my own keys for different engines (not designed for a separate key-key was part of the aluminum flywheel).

I have key way rod (rectangular and long) , you can use a slightly larger key.

I cut the rough dimensions with a cut off wheel. Then, holding it with a vise grip, trimmed the width with a bench mounted grinder. Mine happens to have a 40 grit sanding disc but a stone wheel would work fine.

Just sneak up slowly, especially on the width, as you know, it fits very snug...


I forgot how Rodbolt removes them, if someone remembers, re-posting may help...