How to Open a Pro-Boat 1500Kv Motor

[Ken Haines]

Does anyone know how to open a Pro Boat 1500Kv Motor.
Sounds like I have a bad bearing in one that needs replacing.
I have an old burnt 1500, but when I looked at them today
I am really not sure how they come apart.
Looks like the endbells may be threaded, but I am not sure.
Thx,
Ken

[RandyatBBY]

If there is no screws they are glued. I just tap on the shaft while holding firm and the end bell pops off. Then I use CA to glue back on.

[ray schrauwen]

If you don't mind me asking Ken, how do you tell or what signs do you see that can indicate a bad bearing while motors is still assembled?

Usually I can only tell once it's apart.

[RandyatBBY]

The bearing will make noise or move a little sideways.

[Fluid]

Note that if you remove the endbell by tapping on the shaft you will flatspot the balls and/or dent the races in the endbell bearing. It will need to be replaced regardless if its condition prior to removing the endbell.


.

[Ken Haines]

If you don't mind me asking Ken, how do you tell or what signs do you see that can indicate a bad bearing while motors is still assembled?

Usually I can only tell once it's apart.

This motor is making a very odd sound when running in the boat.
It also has an odd faint metal sound when simply turning the motor by hand.
Could be a rotor rub, but I suspect just a bearing. Either way it needs
to come apart to try to figure it out. I hate to just pitch it even though
these motors are relatively inexpensive.

[Ken Haines]

If there is no screws they are glued. I just tap on the shaft while holding firm and the end bell pops off. Then I use CA to glue back on.

I will assume the endbell only opens at the lead wire end like the AQ motors ?
I only ask as the recent Neu and TP motors open on both ends.

[ray schrauwen]

Most likely. I know AQ gold motors are threaded and glued up front.

[ray schrauwen]

Note that if you remove the endbell by tapping on the shaft you will flatspot the balls and/or dent the races in the endbell bearing. It will need to be replaced regardless if its condition prior to removing the endbell.


.

Thanks buddy. I recently dropped a motor on it's shaft and it pushed out the endbell. I better order some bearings.

[785boats]

Ken.
It is not the rear endbell that you remove. It is the front endbell. It unscrews.

One bearing has a flange on it & the other one doesn't.
Pay attention to which end each bearing goes & please let me know.
I pulled one apart ages ago & have forgotten. It is still in pieces.
Also could you let me know where you get the bearing set from as I haven't been able to find them.
Thanks.
Paul.

[Ken Haines]

Ken.
It is not the rear endbell that you remove. It is the front endbell. It unscrews.

One bearing has a flange on it & the other one doesn't.
Pay attention to which end each bearing goes & please let me know.
I pulled one apart ages ago & have forgotten. It is still in pieces.
Also could you let me know where you get the bearing set from as I haven't been able to find them.
Thanks.
Paul.

Hi Paul,
I had already tried tapping the shaft on the burnt motor
and the shaft moved inside the rotor.
If you are correct I may need to build a little make shift jig to
safely enable me to unscrew the outboard endbell plate.
I am leaving soon and will give it a try tomorrow and let you know.
Thx,
Ken

[Hydrocarbon82]

The shaft will turn with more effort, sometimes lots of effort. The bearing will be "crunchy", or not smooth when turned, or simply seized up. My proboat 3650 had a seized bearing on the output shaft side. It made no noise but was very stiff, still ran okay. To be fair with Proboat, the boat had been fully submerged multiple times all summer, lol.

You can usually find the bearings on ebay (they use generic size), just don't go too cheap. Some china bearings are utter crap.

[T.S.Davis]

Ken, keep in mind that if you repair the motor with new bearings it's no longer legal for NAMBA competition. Works up here and in Atlanta but if you trek to Vegas you're screwed.

[Ken Haines]

Ken, keep in mind that if you repair the motor with new bearings it's no longer legal for NAMBA competition. Works up here and in Atlanta but if you trek to Vegas you're screwed.

Hey Terry,
Still can't get the rubix cube to open,
but if I do I was simply planning to use the bearings from another
pro-boat motor that gave up last fall. Pretty sure that is legal,
but if not I will just simply chuck both of them.
Btw....all 19 boats are ready and loaded ready for the trip to Atlanta.

[T.S.Davis]

Ours aren't loaded but there are 21 of them. I have 3 more props to do tonight.