’83 Johnson—water pump mystery part???

[Moults]

Hey guys. Need some help. I was taking a look at my water pump impeller to see its condition. When I lifted the housing up the shaft this little pin fell out and I wasn’t able to see where it came from. I don’t see any intuitive home for it and I’m at a standstill as far as putting things back together until I figure out where it belongs!

The service manual doesn’t show it and I can’t find it online.

Thanks

Dave

 

[flyingscott]

Looks like the pin that drives the impeller.

 

[CatTwentyTwo]

I'm pretty sure that's the pin that locks the impeller to the drive shaft. A dab of thick grease will hold it on the flat of the shaft while you slide the impeller down over it.

 

[jimmbo]

Did the impeller lift out with the housing? If so, is there a groove/flat in/on driveshaft at the impeller's location?

 

[Moults]

Bingo, yep it’s the key that locks the impeller. I didn’t expect it to be cylindrical like that but that’s how she is! Thanks guys.

 

[racerone]

Just did one the other day.-----Had the round pin.-----Impeller in it was for the plastic key.-----Now it has the impeller for the round pin again.----Moults , you did install a new impeller I hope ?

 

[Moults]

Not yet. I’m that guy that pulls it apart without the kit on hand. I have one on order. Would my taking it apart only this far and putting it back together mess it up? Would you advise against taking it out until I replace the impeller?

 

[kbait]

If it’s pumping/cooling, use it. Fairly quick replacement would be wise by the look of impeller.. Happy boating!