Ok, now this boat is really starting to annoy the CRAP out of me. Horizon was kind enough to replace my motor recently at no charge. Got the motor installed and then I accidentally cracked the coupler.

Got another one and now it spun the shaft loose again. This was even a fairly new shaft that I recently replaced from the last time I had this happen.

The problem is these 2 parts seem to be of very low quality especially the coupler. I read a review on Horizon's website that another individual had the same problems that I'm currently having. Seems like they can't take the strain this boat puts on them for long.

I am however getting really tired of having to replace these parts almost regularly as it is starting to add up $$$ wise. I will be on my 4th flex shaft and 3rd coupler assembly.

2000kv motor on 3S equals about 25,200 RPM. That is pretty significant.

I plan to replace the stock flex shaft with the one that OSE sells as an upgrade but the coupler I'm not sure of. I'd like to try the Octura short length 5mm to .150 coupler that is recommended but I'm not sure if it would fit. At 24mm, it is a bit longer than the stock one. If I had to, I could always drill new holes in the mounting plate and move the motor back a bit.

I'd love to try one of the Aeromarine couplers but at 30mm in length, I think these would be way too long.

It's really a shame that this is happening. I love this boat when it runs properly.