Surpass Hobby 4074 1550 KV Brushless Motor 4Pole Shaft 5mm RC Boat Motor with Water Cooling Jacket for RC Boat (1550kv)

Fair price and work good!

This is a great motor. Ran test on 6S. Very quiet. Easy to install. Look to get in water next week. Great value.

I dropped the 2250kV 4074 as an upgrade in my sonicwake v2. Hits mid 60s mph now with this motor and a 4519 prop on 6S.

Worked well for month and a half then it failed not very impressed. A motor of this size should have larger bullet connecters and wires.

Motor ran great took it out today hope it keeps running this summer

This is by far the largest BLDC motor I own. I build model RC machines, including boats and this motor will be perfect for my larger builds. I tested this with a 40mm prop on a 3s pack and it performed well. The included water cooling jacket is a nice bonus and even comes with spare O-Rings. Be sure to use at the very least an 80a ESC, preferably 100a+ with this motor. I'm running an 80a ESC, which should be fine as long as I don't WOT this motor for extended periods.

The motor itself is great. It's very powerful, only the 1350kv version isn't very fast for a boat. Something in the 3-4000kv is way better. It seems to be of pretty good quality but the cooling sleeve leaks. It was sort of halfway stuck on when I got it. I pressed it all the way on with a lot of effort. After running for 10 minutes the boat was full of water. It was previously water tight. It does come with an extra set of o-rings for the sleeve but it was way too slow for a 23" stealthwake 3s so I don't really want to bother with trying a new set of rings.

Gives good performance on a budget. The case is all aluminum with included extra o rings for the water jacket. The bullet connectors fit like they should and this is serviceable. This is a 5mm shaft so an adapter was needed in my case but other than that cooling hoses were a direct fit along with mounting hole spacing lined up perfectly.