Stock servo fails
Owners keep hitting stripped gears, weak steering, and early failure on the stock FCX24M servo.
Steering Servo Fix
Available now
FCX24M Servo Mount for Emax ES08MA II
If your stock FCX24M steering servo failed, this mount gives you a clean path to a real micro servo without cutting the stock mount or guessing fitment.
Fits FCX24M chassis
Built for Emax ES08MA II size
Stock users need 1.25mm JST → JR adapter
Standard JR receiver users plug straight in
Available now
Why FCX24M Servo Upgrades Get Confusing
Across FCX24 and FCX24M owner discussions, the same pattern keeps showing up: the stock servo fails, normal micro servos do not line up cleanly, and stock-electronics users get caught by the plug mismatch.
Normal micro servos do not fit
The stock FCX24M mount is the blocker. That is why people end up trimming mounts, cutting plastic, or forcing one-screw installs.
Stock users also have plug mismatch
The stock FCX24M electronics use the small JST-style servo plug, so a standard JR servo needs the adapter too.
Why I built this page
When the stock servo failed, I could not find a proper FCX24M replacement mount to buy anywhere. I had to source the 3D print file and get it printed elsewhere because I do not own a 3D printer. After that, whenever someone asked how I did it, I had to point them to the same vendor. So I asked the seller to make a separate mount listing using the file I shared, so the next person would have a cleaner path.
- Started with the stock servo failure
- No easy mount listing existed at the time
- Now there is a cleaner buy path for the same fix
What This Servo Mount Actually Fixes
This mount solves the fitment problem first. It gives the Emax ES08MA II a proper FCX24M mounting path, so you stop guessing around screw placement, alignment, and hacked installs.
- No cutting the stock mount
- No one-screw hack installs
- No guessing whether an Emax-size servo will line up
- Clean path for both stock electronics and standard JR receiver users
Real On-Truck Steering Proof
Short on-truck proof that the mount and Emax fit cleanly and keep working in real use.
- Shows the installed steering sweep on the truck
- Confirms the mount and servo work together cleanly
- Same setup still running after three months
Choose Your FCX24M Steering Path
This is the part most product pages fail to explain. The servo mount path is the same, but the plug path changes depending on your receiver.
Still on stock FCX24M electronics
Stock FCX24M path
- FCX24M servo mount Required
- Emax ES08MA II servo Required
- 1.25mm JST 1.25 Male to JR Adapter Required
- 15T metal servo horn Optional
The stock FCX24M electronics use the small JST-style servo plug, so the adapter is required.
Already on a standard JR receiver
Standard receiver path
- FCX24M servo mount Required
- Emax ES08MA II servo Required
- 15T metal servo horn Optional
The Emax already comes with the normal JR plug, so any standard receiver path can use it directly.
Already on a standard receiver from Flysky, Radiolink, Futaba, DumboRC etc.?
Then the plug problem is already solved. The Emax ES08MA II comes with the normal JR plug, so it connects straight to a standard receiver.
Project24M is the full FCX24M brushless, steering, and lighting path. If you already followed that receiver upgrade or use any other standard JR receiver, skip the adapter. The 1.25mm JST 1.25 Male to JR Adapter is only for the stock FCX24M ESC/receiver combo. Some sellers also call this the ZH version.
How this path compares
Most FCX24M servo pages still make you guess the real cost and fitment story. This table keeps the tradeoff obvious.
| Path | Current price | What you are really buying | Main drawback |
|---|---|---|---|
| Stock FCX24M steering servo |
$9.99 | Cheapest direct replacement on paper | Repeats the same weak stock path |
| RCAWD FCX24M servo set | $19.99 | Servo, horn, and adapter in one set | Still locks you into that specific FCX24M servo path |
| 3Flow9 Cascade servo + mount | $55-70 | Direct-fit premium path with custom servo and mount | Much higher price before horn or extra parts |
| This mount + Emax path | About $15 once for the mount, then about $3–4 per Emax servo | Fixed FCX24M mount cost, then cheap standard servo replacements forever | Stock users still need the JST-to-JR adapter once |
Live reference points checked on April 3, 2026: FMS stock servo at $9.99, RCAWD FCX24M servo set at $19.99, and the 3Flow9 Cascade path generally lands around $55-70 depending on bundle and mount pricing. AliExpress pricing for the Emax path moves more often, so that row uses the current working range rather than pretending it is fixed.
Required Parts Kit
This is the exact steering conversion stack. Product first, role second, platform condition third.
FCX24M Custom Servo Mount Required
The missing conversion part. Makes the Emax fit FCX24M correctly instead of forcing a bad install.
Emax ES08MA II Metal Gear Servo Required
Reliable direct steering upgrade. Standard JR plug. Better path than repeating the stock servo problem.
1.25mm JST 1.25 Male to JR Adapter Required for stock electronics
Needed only if you still use the stock FCX24M ESC/receiver. DumboRC and other JR receivers do not need it.
15T Metal Servo Horn Optional
The Emax already comes with a plastic horn. This is a cleaner-looking optional upgrade with a bit of extra low-down front-end weight.
Product Details
The conversion part that makes the FCX24M steering upgrade path finally make sense.
FCX24M Servo Conversion Mount for EMAX-Style Micro Servo
FCX24M Servo Conversion Mount for EMAX-Style Micro Servo | MJF PA12 3D Printed Upgrade Part
Built for FCX24M owners who want a clean EMAX-style micro servo conversion path instead of forcing a bad stock-mount fit.
Vehicle fitment
FMS FCX24M
Process / material
MJF PA12 Black
Best used with
Emax ES08MA II and the FCX24M steering conversion path on this page
Stock electronics note
Stock FCX24M ESC/receiver users also need the 1.25mm JST 1.25 Male to JR Adapter
Designed for FMS FCX24M
Built for the FCX24M steering conversion path, not a generic one-screw workaround.
Black MJF PA12
Cleaner and more consistent than typical hobby FDM prints, with a tougher nylon feel and no obvious filament lines.
Cleaner upgrade path
Pairs the FCX24M with a standard EMAX-style micro servo without the usual hacked fitment compromises.
Fitment note
Designed for FCX24M users performing a steering servo conversion with an EMAX-style micro servo layout. Confirm your servo, linkage, wiring, and electronics compatibility before ordering.
3D printing note
Minor surface texture and small print irregularities are normal with black MJF PA12 parts. That is part of the process, not a defect by itself.
Visual Proof
Use these proof cards when you want a closer look. Every image opens larger so the fitment details stay readable.
FAQs
No. This is the replacement mount you use when upgrading to an Emax-style micro servo on FCX24M.
The stock FCX24M mount and fitment pattern are different. That is why owners end up trimming plastic, forcing one-screw installs, or trying to make unrelated servo mounts work.
Yes if you still use the stock FCX24M electronics. No if you already run DumboRC or another JR-style receiver.
Yes. The Emax already includes a plastic horn. The 15T metal horn is optional.
They all share the FCX24M platform, so the steering conversion path is fundamentally the same. Electronics routing and body clearance can still vary a bit.
Yes. The stock FCX24M servo screws fit this custom servo mount, so you do not need a separate screw set for the mount swap.
You can buy the stock FCX24M servo again if you want to repeat the original path. The common stock replacement is FMS SKU: C3435. This page exists because the cleaner long-term path is a stronger standard micro servo with the correct FCX24M mount.
What the upgrade feels like in use
Short driving proof so you can see how the upgraded steering feels once it is actually on the truck.
- Smooth steering response under load
- Tracks cleanly without the old stock-servo weakness
- Same mount and servo path after three months
Buy the Exact Steering Conversion Path
Pick the path that matches your receiver so you do not buy half the solution.
Stock FCX24M path
Servo mount + servo + adapter
Best if your truck still uses the stock FCX24M ESC/receiver and stock servo plug.
Available now
Standard JR receiver path
Servo mount + servo
Best if you already use a standard receiver and only need the fitment pieces.
Available now