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  1. #1
    RC Enthusiast
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    Motor Help: Leopard 4074 1774KV or 4082 1600KV

    So after watching my buddy blow up his stock motor using 6s lipos on Saturday afternoon, I'm searching for a new setup for my Spartan. I've only run the stock batteries on mine, but will be receiving 2 3s Lipos tomorrow. I'm scared to run them after I saw my friends bind up after only 3 runs. And he never had it WOT, the pond was too small for that.

    So I was looking at these 2 motors and was wondering what thoughts were from other members that have upgraded. I know the 4074 will spin more RPM's (39,737) vs the 4082 (35,840) on 6S Lipos. But the 4074 is $15 less on the site I'm looking at. Trying to understand why. And the 4074 is 8S capable whereas the 4082 is 6S max. But is the 4074 going to turn too many RPM's for the stock drive shaft? I wasn't planning on changing that. Or the stock prop right now.

    Either I go with will be paired with a Seaking 180A ESC once I can find one in stock.

  2. #2
    RC Competitor
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    Get the 4082 1500kv.... It will have more torque and will probably run cooler...very efficient. Pair it up with a nice prop and the 180 esc and you will have one sick boat. Don't bother running 6s with the stick set up. eBay it before you fry it like your friend did !! Check out my video on YouTube... Search for Yankphan100

  3. #3
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    4082 1600KV? Where at? Most have only the 1500KV and the 4082 series is rated for 9S I believe. Definately 8s but i think its 9S. More RPMs doesnt always mean faster. Id go with the 4082 1500 or 1600KV. I have thge 1500KV in my Spartan

  4. #4
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    I believe they rebranded the 1500KV as the 1600KV:

    http://www.kershawdesigns.com/

    And it's rated for 8S here, thanks for the correction. And thanks for the responses guys. I will go with the 4082. Cooler and more efficient is what I'm looking for. I don't need to go 70. If I can go 50 without worrying about frying a motor, that's cool with me.

  5. #5
    RC Competitor
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    Apr 2011
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    Watch out for Kershaw. Had a bad experience getting mine from him. Took over a a month to get it and caught him lying to me. But I did finally get it after lodging a dispute with paypal. Not saying he's always that bad, but I won't buy from him again.

    You will LOVE the 4082 1600kv with the 180 esc. Way more motor than anyone should ever need in this boat. You'll break 50 with no problem. Get aggressive with the prop (i'm running the x645) and it will break 60. No heat problems at all, everything running cool as a cucumber. Then the only issue will be keeping it in the water! LOL
    Last edited by spartanonfire; 05-23-2011 at 11:42 PM.

  6. #6
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    spartan, i tried an x645 and every time i feel that the cable is binding and it runs like crap with rt lean and torque roll and slow speeds. did u change flex cables or anything?

    I ran 58 with an M445 and 1 time i put the 645 on it ran CRAZY fast and had to be over 60mph but only 1 time i got it to run smooth on the 645

  7. #7
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    Had to make a different choice on motors today. Can't find the Leopard 4082 anywhere. So have decided to go with the CC1515 2200KV. I know that's a LOT of RPM on 6S. But I'm planning on getting a smaller prop than the stock one to try to offset. Thinking a P215 or P220. And will run on 4S as a test with stock stuff to see the difference.

  8. #8
    RC Competitor
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    Hey snafu.... Offshoreelectrics . Com has the leopard 4082 1500kv in stock... 16 of them. If that's the motor you want, I'd order right away because they just got them in stock. It's where I bought mine... They are great to deal with. I bought an m645 Octura prop from them also.... Awesome setup.

  9. #9
    RC Racer
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    Mar 2011
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    Dandridge Tn
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    i run the cc1515 on mine with stock prop and im getting a p220 but this boat will run very fast with this motor and a seaking 180you will not regret your decision

  10. #10
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    nobuddy help snafujg, i cannot let him be faster than me!!!!! lol jk im curious about the m645 prop issues?? i ordered mine sunday night after my boat fried saturday like snafujg mentioned. ill e running the 4082 1600 seaking 180a with the m645 as my first prop!

  11. #11
    RC Competitor
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    I use an m645 with my 1500kv leopard with no issues.

  12. #12
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    I must have just missed the Leopard's on OSE. I ordered my ESC, Water Cooling Jacket and Prop from there earlier today and they definitely didn't have any then. Oh well. I'm happy with my decision. A little more money, but I know I got a good setup.
    Now, make sure to blast on Snow4664 a little bit. Tell him his boat will be slower than mine.

  13. #13
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    Willa m645 work good witha leopard 1400kv motor? What would be the best prop for that motor with 6s?
    spartan1 castle ice 240 castle 2200 Prather 220

  14. #14
    RC Competitor
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    Quote Originally Posted by Shaun78 View Post
    spartan, i tried an x645 and every time i feel that the cable is binding and it runs like crap with rt lean and torque roll and slow speeds. did u change flex cables or anything?

    I ran 58 with an M445 and 1 time i put the 645 on it ran CRAZY fast and had to be over 60mph but only 1 time i got it to run smooth on the 645

    I put in an aftermarket flex cable and teflon liner and have had no binding issues. Since others have had issues with the .150 cable drive on this setup I ordered a wire drive, coupler and matching liner just to play it safe. My goal is a wicked fast, bulletproof spartan. The way I expected it to be in the first place.

  15. #15
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    what kind of coupler do i need and this wire drive?? i may have to order it like you said to be on the safe side!

  16. #16
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    Quote Originally Posted by Snafujg View Post
    Had to make a different choice on motors today. Can't find the Leopard 4082 anywhere. So have decided to go with the CC1515 2200KV. I know that's a LOT of RPM on 6S. But I'm planning on getting a smaller prop than the stock one to try to offset. Thinking a P215 or P220. And will run on 4S as a test with stock stuff to see the difference.
    2200KV is way too high with 6 cells - the 4 cell will get you about 40,000 rpm. Just about stock rpm. With a 6 cell (about 25 volts) times 2200 = 55,000 rpm . OSE actually recommends 35,000 as the max RPM. Probably the props start to get less and less efficient as you go past 30-35K. I would expect broken cables at the higher RPM.

    Replaced stock system with the Lepopard 4082 1600kv and the SeaKing 180 esc. 4082 - Watts: 2000 with Over 3500 Burst. 3500 at 25 volts is 140 amps.

    Programming the SeaKing. I use a cutoff of 3.4 volts per cell. That allows me to bring in the boat with just under 3.8 volts per cell (6 cell about 22.8). Why so high? You get maximum recharges if you don't take the Lipo below 20% charge remaining. We are using one or two steps lower timing than default. This keeps the motor very cool. Longevity vice ultimate speed.

    We will bring the timing up to default or so in steps while we monitor the motor temp. So far with this setup the hottest item in the boat was the connectors to the motor. Motor and ESC were only up to 115 degrees. Heck the air here gets hotter than that in the summer. Too much resistance with the stock connectors. So we will be replacing them with the 8 mm connectors available from Hobby City.

  17. #17
    RC Racer
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    i have been running a cc1515 2200KV for months on a stock drive shaft and on 6s and have had no problem with 2200KV motorin this boat

  18. #18
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    Did not say you can't do it but it is too high for the setup in this boat. The resulting rpms on the shaft will result in pre-mature wear on the lining. The RPM also results in a less efficient prop. The experts such as OSE use 35000 rpm as the top. If one wants more speed then use a bigger higher pitched prop. Personally I prefer that my boats last longer so I try to say with the lower RPMs

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