I’ve gone through the same exercise, although my model is earlier (6026) and there was lots of grease in the lower unit and nothing was too stuck. That said, I have yet to remove the cups. As for the bearings (cones & cups), I determined that the drive shaft on mine is 3/4″ dia. The forward end of the prop shaft is also 3/4″. In old bearing speak, that is a 05075 cone. The corresponding cup is 05185. My prop shaft is smaller on the prop end. It’s .66″ therefore the corresponding bearing cone 05066. It also uses the 05185 cup. Imperial taper bearings use a common numbering system so a “05075 cone is the same number in Timken, National, SKF. You can look up bearing dimensions in the CAD drawings available online from Timken. There are a few different 05185 variations, depending on if the outer edge of the cup is chamfered and if so, how much. Therefore it could be an 05185S or other. I am not a bearing expert – this is from my research. I believe your motor is the same from the comparisons I’ve made (by part number) while trying to find my own parts. Your prop shaft is probably straight and therefore 3/4”. If so, you need the 05075 not the 05066.
I hope this is helpful.
Thanks for the “helpful” information on bearings. It sounds like my new
Speeditwin has bigger shafts than yours.
The major part of the prop shaft (which the ball bearing rides) is 25 mm, .984, or 63/64″ inch
The small end of the prop shaft that the tapered roller bearing goes is 15.5 mm, or 669″
My drive shaft is .785″
From researching, I believe the correct prop shaft ball bearing I need is a 6205.
The two tapered roller bearing cups are 05185
I still need to do more research on the two tapered roller bearing cones. I’m not sure
how to measure them to match up online specs, so I’ll have to study those CAD drawings.
You say that a 05075 cone translates into fitting a 3/4″ shaft. Is the 75 on the end of
the number telling me this, that “75” = .750″
If so, what would one conclude the numbers to be for a .669″ (or 15.5mm) shaft be?
050 _ _ ?
Thanks again for the help!
Prepare to be boarded!
