1999 BF50 Propeller Fitment

[msoboatdude99]

Hello!

When I bought this motor it had no propeller. I bought a used one from eBay that was supposedly the right part #. Well, it appears to be wrong.

I believe I have a BF50AXLRTA.

When installed, and the prop is against the splined spacer, there's a big gap between the prop and the lower unit. The prop can slide back and rub on the lower unit. Unfortunately I didn't notice this in my rush to get out on the water and it damaged the prop and lower unit.

Am I missing another spacer that goes behind the prop? Or is this just the wrong propeller?

See attached .

 

[jgmo]

It appears to me that you have the thrust washer installed incorrectly.
It's supposed to be between the prop and the gearcase.

See item 16 in the link for reference.

https://www.boats.net/catalog/honda/outboard/1999/50hp/bf50ax-lrta-vin-bazl-3000001-to-bazl-3099999/propeller

Good luck.

 

[msoboatdude99]

After further investigation, you were right that I'm missing #16 in the diagram. Parts ordered.

I also ordered a cheapo propeller to get me by for a few trips and the comparison is shocking. I'm lucky things didn't go wrong out on the water. Now I'm curious how much material I lost from the lower unit...

 

[racerone]

You have to make sure you fit the CORRECT pitch propeller for the boat that the motor is used on.

 

[msoboatdude99]

Yep that's another reason I went cheap. This is a bit of an experiment.

 

[jgmo]

Weeeeell....

....I hate to say this to you...and....

....I sincerely HOPE that I'm wrong...

....I often am after all.

But in your first photo at the top of the the thread, it looks as if the portion of the gearcase that the propshaft holder bolts to is no longer there!
I also don't see the holder retainer bolts OR the end flange of the propshaft holder where the bolts go through!

However, if that is actually true, I have NO explanation for how you could have been using the outboard because I would think that MOST of the transmission would simply fall out and sink the INSTANT you put it in reverse. It would also make one HECK of a racket in forward gear that you couldn't have possibly missed and not stopped to investigate!

So... ...again... ...I hope that isn't correct and that my old eyes and mind are playing tricks!

You can Google "Honda outboard motor photos" and there are sites selling pictures of outboards where you might find a sample shot of what that area on the outboard is supposed to look like.

Good luck.

 

[jgmo]

Well, after looking at the parts page I sent you, it does appear that I was WRONG about the propshaft holder and bolts.
It looks like your outboard has a different gearcase than the one I was thinking of. NO BOLTS, NO FLANGE.

My confusion stems from what I believe is that Honda used.Mercury gearcases in the early days of some of their outboard models and I have never seen one of those in person.

Your propshaft holder is held in by a large nut with external threads. So, disregard my mistaken "musings" in post #6 of this thread. The penalty I pay for "shooting from the hip" so to speak.

I really can't say if  any damage occurred due to the missing thrust washer, Maybe nothing significant at all might be the case. I don't know.

Due to the much longer hub of your latest replacement prop's hub though, be very observant and cautious about how it fits before running it.

Sorry for any confusion I may have caused you.

Good luck.